🔒 pin tests.yml actions to commit SHAs (#721)

* Bump vLLM and TRL

* Fix Makefile

.github/workflows/tests.yml

@@ -16,9 +16,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
       - name: Setup Python environment
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5
         with:
           python-version: 3.10.10
       - name: Install dependencies

.gitignore

@@ -177,4 +177,5 @@ logs/
 eval_results/
 results/
 
-.vscode/
+.vscode/
+.python-version

Makefile

@@ -8,10 +8,11 @@ check_dirs := src tests
 
 # dev dependencies
 install:
-	uv venv openr1 --python 3.11 && . openr1/bin/activate && uv pip install --upgrade pip
-	uv pip install vllm==0.7.2
-	uv pip install setuptools
-	uv pip install flash-attn --no-build-isolation
+	uv venv openr1 --python 3.11
+	. openr1/bin/activate && uv pip install --upgrade pip && \
+	uv pip install vllm==0.8.5.post1 && \
+	uv pip install setuptools && \
+	uv pip install flash-attn --no-build-isolation && \
 	GIT_LFS_SKIP_SMUDGE=1 uv pip install -e ".[dev]"
 
 style:
@@ -46,8 +47,7 @@ evaluate:
 			--use-chat-template \
 			--output-dir data/evals/$(MODEL); \
 	else \
-		lighteval vllm $$MODEL_ARGS "custom|$(TASK)|0|0" \
-			--custom-tasks src/open_r1/evaluate.py \
+		lighteval vllm $$MODEL_ARGS "lighteval|$(TASK)|0|0" \
 			--use-chat-template \
 			--output-dir data/evals/$(MODEL); \
 	fi

README.md

@@ -21,10 +21,9 @@
 The goal of this repo is to build the missing pieces of the R1 pipeline such that everybody can reproduce and build on top of it. The project is simple by design and mostly consists of:
 
 
-- `src/open_r1`: contains the scripts to train and evaluate models as well as generate synthetic data:
+- `src/open_r1`: contains the scripts to train models as well as generate synthetic data:
     - `grpo.py`: trains a model with GRPO on a given dataset.
     - `sft.py`: performs a simple SFT of a model on a dataset.
-    - `evaluate.py`: evaluates a model on the R1 benchmarks.
     - `generate.py`: generates synthetic data from a model using [Distilabel](https://github.com/argilla-io/distilabel).
 - `Makefile`: contains easy-to-run commands for each step in the R1 pipeline leveraging the scripts above.
 
@@ -42,6 +41,7 @@ We will use the DeepSeek-R1 [tech report](https://github.com/deepseek-ai/DeepSee
 
 ## News 🗞️
 
+* **🧑‍🍳 [2025/05/26] (Step 1 completed!)** We release [**Mixture-of-Thoughts**](https://huggingface.co/datasets/open-r1/Mixture-of-Thoughts)--a curated reasoning dataset of 350k verified traces distilled from R1. The dataset spans tasks in mathematics, coding, and science, and is designed to teach language models to reason step-by-step. We also provide a recipe to train [OpenR1-Distill-7B](https://huggingface.co/open-r1/OpenR1-Distill-7B), which replicates the reasoning capabilities of [deepseek-ai/DeepSeek-R1-Distill-Qwen-7B](https://huggingface.co/deepseek-ai/DeepSeek-R1-Distill-Qwen-7B) and marks the completion of step 1 in the Open R1 project.
 * **⚡️ [2025/03/11] [(update #3)](https://huggingface.co/blog/open-r1/update-3):** We release the [**CodeForces-CoTs**](https://huggingface.co/datasets/open-r1/codeforces-cots) dataset of 10k competitive programming problems and 100k solutions distilled from R1. We also release IOI24: a new benchmark of _very_ hard problems from international olympiads. A 7B Qwen model trained on CodeForces-CoTs can outperform Claude 3.7 Sonnet on IOI24, while a 32B model can outperform R1 itself.
 * **∞ [2025/02/10] [(update #2)](https://huggingface.co/blog/open-r1/update-2):** We release the [**OpenR1-Math-220k**](https://huggingface.co/datasets/open-r1/OpenR1-Math-220k) dataset of 220k traces distilled from R1 on a new version of NuminaMath. Models trained on this dataset match the performance of DeepSeek's distilled ones.
 * **🔥 [2025/02/02] [(update #1)](https://huggingface.co/blog/open-r1/update-1):** We implement the first parts of the [training](https://github.com/huggingface/open-r1?tab=readme-ov-file#training-models), [inference](https://github.com/huggingface/open-r1?tab=readme-ov-file#data-generation), and [evaluation](https://github.com/huggingface/open-r1?tab=readme-ov-file#reproducing-deepseeks-evaluation-results) pipelines. Let's go!  
@@ -69,11 +69,11 @@ uv venv openr1 --python 3.11 && source openr1/bin/activate && uv pip install --u
 Next, install vLLM and FlashAttention:
 
 ```shell
-uv pip install vllm==0.7.2
+uv pip install vllm==0.8.5.post1
 uv pip install setuptools && uv pip install flash-attn --no-build-isolation
 ```
 
-This will also install PyTorch `v2.5.1` and it is **very important** to use this version since the vLLM binaries are compiled for it. You can then install the remaining dependencies for your specific use case via `pip install -e .[LIST OF MODES]`. For most contributors, we recommend:
+This will also install PyTorch `v2.6.0` and it is **very important** to use this version since the vLLM binaries are compiled for it. You can then install the remaining dependencies for your specific use case via `pip install -e .[LIST OF MODES]`. For most contributors, we recommend:
 
 ```shell
 GIT_LFS_SKIP_SMUDGE=1 uv pip install -e ".[dev]"
@@ -100,25 +100,30 @@ sudo apt-get install git-lfs
 
 ## Training models
 
-We support training models with either DDP or DeepSpeed (ZeRO-2 and ZeRO-3). For example, to run SFT on a dataset distilled from DeepSeek-R1 with reasoning traces such as [open-r1/OpenR1-Math-220k](https://huggingface.co/datasets/open-r1/OpenR1-Math-220k), run:
+> [!NOTE]
+> The training commands below are configured for a node of 8 x H100s (80GB). For different hardware and topologies, you may need to tune the batch size and number of gradient accumulation steps.
+
+We support training models with either DDP or DeepSpeed (ZeRO-2 and ZeRO-3). For example, to perform SFT on a dataset distilled from DeepSeek-R1 with reasoning traces such as [open-r1/Mixture-of-Thoughts](https://huggingface.co/datasets/open-r1/Mixture-of-Thoughts), run:
 
 ```shell
 # Train via command line
 accelerate launch --config_file=recipes/accelerate_configs/zero3.yaml src/open_r1/sft.py \
-    --model_name_or_path Qwen/Qwen2.5-1.5B-Instruct \
-    --dataset_name open-r1/OpenR1-Math-220k \
-    --learning_rate 1.0e-5 \
-    --num_train_epochs 1 \
-    --packing \
-    --max_seq_length 16384 \
-    --per_device_train_batch_size 16 \
+    --model_name_or_path open-r1/Qwen2.5-Math-7B-RoPE-300k \
+    --dataset_name open-r1/Mixture-of-Thoughts \
+    --dataset_config all \
+    --eos_token '<|im_end|>' \
+    --learning_rate 4.0e-5 \
+    --num_train_epochs 5 \
+    --max_seq_length 32768 \
+    --per_device_train_batch_size 2 \
     --gradient_checkpointing \
     --bf16 \
-    --output_dir data/Qwen2.5-1.5B-Open-R1-Distill
+    --use_liger_kernel \
+    --output_dir data/OpenR1-Distill-7B
 
 # Train via YAML config
 accelerate launch --config_file recipes/accelerate_configs/zero3.yaml src/open_r1/sft.py \
-    --config recipes/Qwen2.5-1.5B-Instruct/sft/config_demo.yaml
+    --config recipes/OpenR1-Distill-7B/sft/config_distill.yaml
 ```
 
 Currently, the following tasks are supported:
@@ -132,62 +137,160 @@ Currently, the following tasks are supported:
 By default, these scripts will push each model to your Hugging Face Hub username, i.e. `{username}/{model_name}-{task}`. You can override the parameters in each YAML config by appending them to the command as follows: 
 
 ```shell
-# Change batch size, number of epochs etc
+# Change the base model to a smaller variant
 accelerate launch --config_file recipes/accelerate_configs/zero3.yaml src/open_r1/sft.py \
-    --config recipes/Qwen2.5-1.5B-Instruct/sft/config_demo.yaml
-    --per_device_train_batch_size=1 --num_train_epochs=5
+    --config recipes/OpenR1-Distill-7B/sft/config_distill.yaml \
+    --model_name_or_path Qwen/Qwen3-0.6B-Base \
+    --hub_model_id OpenR1-Distill-0.6B \
+    --output_dir data/OpenR1-Distill-0.6B
 ```
 
 If you also wish to override the Weights and Biases default settings, you can do so as follows:
 
 ```shell
 accelerate launch --config_file recipes/accelerate_configs/zero3.yaml src/open_r1/sft.py \
-    --config recipes/Qwen2.5-1.5B-Instruct/sft/config_demo.yaml
+    --config recipes/OpenR1-Distill-7B/sft/config_distill.yaml
     --wandb_entity huggingface --wandb_project open-r1 --run_name Qwen2.5-1.5B-GRPO
 ```
 
-> [!NOTE]
-> The training commands below are configured for a node of 8 x H100s (80GB). For different hardware and topologies, you may need to tune the batch size and number of gradient accumulation steps.
+**🚨 WARNING 🚨**
 
-### SFT
+Most base models like `meta-llama/Llama-3.2-1B` do not have a chat template, so we set ChatML as the default during training. However, for Qwen base models like `Qwen/Qwen2.5-1.5B`, a chat template is pre-defined in the tokenizer, so the EOS token must be set accordingly, e.g.
 
-To run SFT on a dataset distilled from DeepSeek-R1 with reasoning traces such as [open-r1/OpenR1-Math-220k](https://huggingface.co/datasets/open-r1/OpenR1-Math-220k), run:
+```diff
+# Align EOS token with chat template for Qwen base models
+accelerate launch --config_file=recipes/accelerate_configs/zero3.yaml src/open_r1/sft.py \
+    --model_name_or_path Qwen/Qwen2.5-1.5B \
++   --eos_token '<|im_end|>'
+    --dataset_name open-r1/Mixture-of-Thoughts \
+    --dataset_config all \
+    --learning_rate 4.0e-5 \
+    --num_train_epochs 1 \
+    --max_seq_length 32768 \
+    --per_device_train_batch_size 16 \
+    --gradient_checkpointing \
+    --bf16 \
+    --use_liger_kernel \
+    --output_dir data/Qwen2.5-1.5B-Open-R1-Distill
+```
+
+If you wish to use a custom chat template (e.g. Llama or Gemma), then the chat template and associated EOS token must be provided:
+
+```diff
+# Align EOS token with custom chat template
+accelerate launch --config_file=recipes/accelerate_configs/zero3.yaml src/open_r1/sft.py \
+    --model_name_or_path meta-llama/Llama-3.2-1B \
++   --chat_template "$(cat llama_chat_template.jinja)" \
++   --eos_token '<|eot_id|>' \
+    --dataset_name open-r1/Mixture-of-Thoughts \
+    --dataset_config all \
+    --learning_rate 4.0e-5 \
+    --num_train_epochs 1 \
+    --max_seq_length 32768 \
+    --per_device_train_batch_size 16 \
+    --gradient_checkpointing \
+    --bf16 \
+    --use_liger_kernel \
+    --output_dir data/Llama-3.2-1B-Open-R1-Distill
+```
+
+### SFT distillation
+
+We provide a recipe to reproduce the reasoning capabilities of [deepseek-ai/DeepSeek-R1-Distill-Qwen-7B](https://huggingface.co/deepseek-ai/DeepSeek-R1-Distill-Qwen-7B), starting from the same base model. To do so, run:
 
 ```shell
 ACCELERATE_LOG_LEVEL=info accelerate launch --config_file recipes/accelerate_configs/zero3.yaml \
     src/open_r1/sft.py \
-    --config recipes/Qwen2.5-1.5B-Instruct/sft/config_demo.yaml
+    --config recipes/OpenR1-Distill-7B/sft/config_distill.yaml
 ```
 
+The result will be a model like [open-r1/OpenR1-Distill-7B](https://huggingface.co/open-r1/OpenR1-Distill-7B), with the following downstream performance:
+
+| Model                       | AIME 2024 | MATH-500 | GPQA Diamond | LiveCodeBench v5 |
+|-----------------------------|-----------|----------|--------------|------------------|
+| OpenR1-Distill-7B           | 52.7      | 89.0     | 52.8         | 39.4             |
+| DeepSeek-R1-Distill-Qwen-7B | 51.3      | 93.5     | 52.4         | 37.4             |
+
+You can adjust the YAML config to train on a different base model or dataset.
+
 ### GRPO
-We use TRL's new distributed vLLM server and GRPOTraining in order to scale to larger >7B models. We provide an example slurm script:
+
+We use TRL's [vLLM backend](https://huggingface.co/docs/trl/speeding_up_training?vllm+examples=GRPO#vllm-for-fast-generation-in-online-methods) to scale training to large models across multiple nodes. For single-node training of smol models across 8 GPUs, use `vllm_mode="colocate"` to run vLLM in the same process as the training script:
+
 ```shell
-sbatch --job-name=trl-Qwen2.5-Math-7B-config_simple_rl --nodes=2 slurm/train.slurm Qwen2.5-Math-7B grpo config_simple_rl zero3 
+ACCELERATE_LOG_LEVEL=info \
+    accelerate launch --config_file recipes/accelerate_configs/zero3.yaml \
+    src/open_r1/grpo.py --config recipes/DeepSeek-R1-Distill-Qwen-1.5B/grpo/config_demo.yaml \
+    --vllm_mode colocate
 ```
 
-You will need to adapt the `slurm/train.slurm` script to match your cluster.
+> [!WARNING]
+> The chat template used in the distilled DeepSeek models omits the contents of the reasoning block within the `<think>` and `</think>` tags. It also prefills the assistant response with `<think>` which interferes with the format reward function. To handle that, it is important to override the chat template as done in e.g.  [recipes/DeepSeek-R1-Distill-Qwen-1.5B/grpo/config_demo.yaml](./recipes/DeepSeek-R1-Distill-Qwen-1.5B/grpo/config_demo.yaml).
 
-Our final [model](https://huggingface.co/Dongwei/Qwen-2.5-7B_Base_Math_smalllr), while using different learning rates, loss functions and reward structures, achieves 69.4% accuracy on MATH-500, demonstrating a 17%+ improvement over the base model.
+For multi-node training on N+1 nodes, with 1 node running the vLLM server and N nodes running training, we provide an example Slurm script. For example, to run the above example on 1+1 nodes with data parallelism, run:
+
+```shell
+sbatch --nodes=2 slurm/train.slurm --model Qwen2.5-1.5B-Instruct --task grpo --config demo --accelerator zero2 --dp 8 --tp 1
+```
+
+See the [Launching jobs on a Slurm cluster](#launching-jobs-on-a-slurm-cluster) section for more details.
+
+#### GRPO dataset filtering
+
+We provide support to filter datasets by generating and computing pass rate on veriable tasks, see this [README](scripts/pass_rate_filtering/README.md)
 
 #### 👨‍💻 Training with a code interpreter
 
-We provide a `code` reward function for executing code generated by the policy during training. Currently, this reward function targets code contests like [Codeforces](https://codeforces.com), where solutions are executed against a set of test cases and the overall success rate is returned as the final reward. To ensure safe execution, we use [E2B](https://e2b.dev) sandboxes, which are fast and cheap to run. To use this reward function, first install the necessary dependencies:
+We provide a `code` reward function for executing code generated by the policy during training. Currently, this reward function targets code contests like [Codeforces](https://codeforces.com), where solutions are executed against a set of test cases and the overall success rate is returned as the final reward. To ensure safe execution, we support multiple sandbox providers:
+
+1. [E2B](https://e2b.dev) - Fast, cloud-based sandboxes with focus on Python execution
+2. [Morph](https://cloud.morph.so/web/) - Cloud-based sandboxes with broader language support - Python/JS/C++/Rust
+
+To use the code reward function, first install the necessary dependencies:
 
 ```shell
 uv pip install -e '.[code]'
 ```
 
-Then create a `.env` file and place an API token from E2B within it:
+##### E2B Provider
+
+To use E2B sandboxes, create a `.env` file and add your E2B API token:
 
 ```
 E2B_API_KEY="e2b_xxx"
 ```
 
-Then make sure your dataset contains a `verification_info` column with the following schema (adopted from PrimeIntellect's excellent [datasets](https://huggingface.co/collections/PrimeIntellect/synthetic-1-67a2c399cfdd6c9f7fae0c37) of verifiable problems):
+##### Morph Provider
+
+To use Morph, first install the morphcloud package:
+
+```shell
+pip install morphcloud
+```
+
+Then add your Morph API token to the `.env` file:
+
+```
+MORPH_API_KEY="YOUR_MORPH_API_KEY"
+```
+
+To specify which provider to use, add the `provider_type` parameter in your configuration:
+
+```yaml
+# For E2B
+provider_type: e2b
+
+# For Morph
+provider_type: morph
+```
+
+##### Dataset Requirements
+
+Make sure your dataset contains a `verification_info` column with the following schema (adopted from PrimeIntellect's excellent [datasets](https://huggingface.co/collections/PrimeIntellect/synthetic-1-67a2c399cfdd6c9f7fae0c37) of verifiable problems):
 
 ```python
 {
-    "language": "python",
+    "language": "python",  # Morph supports more languages including C++, Java, etc.
     "test_cases": [
         {
             "input": "4\n4\n0001\n1000\n0011\n0111\n3\n010\n101\n0\n2\n00000\n00001\n4\n01\n001\n0001\n00001\n",
@@ -198,58 +301,94 @@ Then make sure your dataset contains a `verification_info` column with the follo
 }
 ```
 
-For example, to train a smol model on Python problems, run:
+For example, to train a smol model on Python problems, start the vLLM server:
 
 ```shell
-ACCELERATE_LOG_LEVEL=info accelerate launch --config_file recipes/accelerate_configs/zero2.yaml \
-    --num_processes=7 src/open_r1/grpo.py \
-    --config recipes/Qwen2.5-1.5B-Instruct/grpo/config_demo_code.yaml
+CUDA_VISIBLE_DEVICES=0 trl vllm-serve --model Qwen/Qwen2.5-1.5B-Instruct
 ```
 
-#### IOI problems
+Then run training with:
 
-We provide a `ioi_code_reward` reward function for executing problems from [IOI](https://hf.co/datasets/open-r1/ioi) using [piston](https://github.com/engineer-man/piston).
+```shell
+CUDA_VISIBLE_DEVICES=1,2,3,4,5,6,7 ACCELERATE_LOG_LEVEL=info \
+    accelerate launch --config_file recipes/accelerate_configs/zero2.yaml --num_processes=7 \
+    src/open_r1/grpo.py --config recipes/Qwen2.5-1.5B-Instruct/grpo/config_demo_code.yaml
+```
 
-To get piston workers running, see [slurm/piston/README.md](./slurm/piston/README.md).
-Set your environment variable `PISTON_ENDPOINTS` to `slurm` or to a list of piston worker endpoints.
+##### Using Router Services
+
+It is possible to be rate limited when too many scripts are executed on sandbox services. For both providers, we offer router scripts that can be launched on a CPU node:
+
+For E2B:
+```shell
+sbatch slurm/e2b_router.slurm
+```
+
+For Morph:
+```shell
+sbatch slurm/morph_router.slurm
+```
+
+Then add the router URL in your training YAML config:
+```yaml
+# For E2B
+e2b_router_url: 1.2.3.4:8000
+
+# For Morph
+morph_router_url: 1.2.3.4:8000
+```
+
+The port should match the one used when launching the router.
+All training jobs can share the same router IP which will ensure parallel executions are properly managed.
+
+#### Competitive Programming problems: IOI & CodeForces
+
+We provide `ioi_code_reward` and `cf_code_reward` reward functions for executing problems from [IOI](https://hf.co/datasets/open-r1/ioi) and [CodeForces](https://huggingface.co/datasets/open-r1/codeforces), respectively. You can use either [piston](https://github.com/engineer-man/piston) or Morph (currently IOI only) as your execution provider.
+
+##### Piston 
+
+To use Piston:
+1. Get piston workers running, see [slurm/piston/README.md](./slurm/piston/README.md)
+2. Set your environment variable `PISTON_ENDPOINTS` to `slurm` or to a list of piston worker endpoints
+
+For IOI:
+
+3. In your configuration, use `ioi_provider: "piston"`
+
+For CodeForces:
+
+3. Download the generated (hard) test cases:
+```
+# change PATH_TO_SAVE_TESTCASES. Increase --max-workers according to your machine's capacity
+huggingface-cli download open-r1/codeforces --repo-type=dataset --include='generated_tests/*.parquet' --max-workers=8 --local-dir PATH_TO_SAVE_TESTCASES 
+```
+4. Save the path in .env:
+```
+CF_TESTS_FOLDER=PATH_TO_SAVE_TESTCASES
+```
+
+##### Morph 
+
+Morph is a cloud-based solution that provides sandboxed environments for running code. To use it:
+1. Install the Morph client: `pip install morphcloud`
+2. Add your Morph API key to the `.env` file: `MORPH_API_KEY="your_key_here"`
+3. In your configuration, use `ioi_provider: "morph"`
+
+##### Example recipes
+For IOI:
+
+See the [example recipe](./recipes/Qwen2.5-1.5B-Instruct/grpo/config_demo_code_ioi.yaml) for how to use the IOI reward function:
 
-See the [example recipe](./recipes/Qwen2.5-1.5B-Instruct/grpo/config_demo_code_ioi.yaml) for how to use the reward function:
 ```shell
 ACCELERATE_LOG_LEVEL=info accelerate launch --config_file recipes/accelerate_configs/zero2.yaml \
     --num_processes=7 src/open_r1/grpo.py \
     --config recipes/Qwen2.5-1.5B-Instruct/grpo/config_demo_code_ioi.yaml
 ```
 
-
-#### Data decontamination
-
-Following [s1: Simple test-time scaling](https://arxiv.org/abs/2501.19393) the data can be decontaminated using the script at: [scripts/decontaminate.py](./scripts/decontaminate.py), which decontaminates a dataset using 8-grams and deduplicate the data. Sample run:
+For CodeForces:
 
 ```shell
-python scripts/decontaminate.py \
-    --dataset "open-r1/verifiable-coding-problems-python" \
-    --problem_column problem \
-    --cleanup
-```
-
-It will decontaminate against the benchmark datasets, and remove the contaminated samples afterwards. If no argument `--new_dataset_name` is provided, the same dataset will be reused, adding a `_decontaminated`. It runs against the prompt, which for this dataset is the column `problem`, but a different one can be provided.
-
-Arguments for the script:
-
-```shell
-usage: decontaminate.py [-h] --dataset DATASET [--split SPLIT] [--ngram_size NGRAM_SIZE] [--problem_column PROBLEM_COLUMN] [--cleanup] [--new_dataset_name NEW_DATASET_NAME]
-
-options:
-  -h, --help            show this help message and exit
-  --dataset DATASET     Name of the dataset to check for contamination.
-  --split SPLIT         Split to check for contamination, defaults to `train`.
-  --ngram_size NGRAM_SIZE
-                        Size of n-grams to build, defaults to 8.
-  --problem_column PROBLEM_COLUMN
-                        Name of the column containing the problem (prompt).
-  --cleanup           Whether to remove the contaminated rows before pushing the dataset.
-  --new_dataset_name NEW_DATASET_NAME
-                        New name for the dataset. If not provided, will reuse the name and add a `_decontaminated` to the name.
+sbatch --job-name=cf-grpo --nodes=2 slurm/train.slurm --model Qwen2.5-Coder-7B-Instruct --task grpo --config codeforces --accelerator zero3 --dp 8 --tp 1
 ```
 
 ### Launching jobs on a Slurm cluster
@@ -257,48 +396,76 @@ options:
 If you have access to a Slurm cluster, we provide a `slurm/train.slurm` script that will automatically queue training jobs for you. Here's how you can use it:
 
 ```shell
-sbatch --job-name=open_r1 --nodes=1 slurm/train.slurm {model_name} {task} {config_suffix} {accelerator}
+sbatch --job-name=open_r1 --nodes=1 slurm/train.slurm --model {model_name} --task {task} --config {config_suffix} --accelerator {accelerator}
 ```
 
 Here `{model_name}` and `{task}` are defined as above, while `{config_suffix}` refers to the specific config and `{accelerator}` refers to the choice of 🤗 Accelerate config in `recipes/accelerate_configs`. If you wish to override the default config parameters, you can provide them by appending a space-separated string like `'--arg1=value1 --arg2=value2'`. Here's a concrete example to run SFT on 1 node of 8 GPUs:
 
 ```shell
-# Launch on Slurm and override default hyperparameters
-sbatch --job-name=open_r1 --nodes=1 slurm/train.slurm Qwen2.5-1.5B-Instruct sft demo zero3 '--per_device_train_batch_size=1 --num_train_epochs=5'
+sbatch --job-name=open_r1 --nodes=1 slurm/train.slurm --model OpenR1-Distill-7B --task sft --config distill --accelerator zero3
 ```
 
 You can scale the number of nodes by increasing the `--nodes` flag.
 
+For GRPO, we use 1 node for the vLLM server and N nodes for training. For example, to run GRPO on 1+1 nodes with mixed data and tensor parallelism, run:
+
+```shell
+sbatch --job-name=open_r1 --nodes=2 slurm/train.slurm --model Qwen2.5-1.5B-Instruct --task grpo --config demo --accelerator zero2 --dp 4 --tp 2
+```
+
 > [!NOTE]
 > The configuration in `slurm/train.slurm` is optimised for the Hugging Face Compute Cluster and may require tweaking to be adapted to your own compute nodes.
 
+### Customising the dataset mixture
+
+To combine multiple datasets as a single training mixture, you can specify the `dataset_mixture` parameter in the YAML config file. Here's a template for how to do this:
+
+```yaml
+dataset_mixture:
+  datasets:                     # List of datasets to include in the mixture
+    - id: dataset_1             # Hub dataset ID
+      config: config_name_1     # Name of the dataset config
+      split: split_1            # Split to use from the dataset
+      columns:                  # Columns to keep
+        - column_1              
+        - column_2    
+      weight: 0.25              # Fraction of dataset to use
+    - id: dataset_2
+      config: config_name_2
+      split: split_2
+      columns:                  
+        - column_1              
+        - column_2   
+      weight: 0.5
+  seed: 42                      # Seed for shuffling the combined dataset
+  test_split_size: 0.1          # Fraction of mixture to use for a test split
+```
+
 ## Evaluating models
 
-We use `lighteval` to evaluate models, with custom tasks defined in `src/open_r1/evaluate.py`. For models which fit on a single GPU, run:
+We use `lighteval` to evaluate models. For models which fit on a single GPU, run:
 
 ```shell
+export VLLM_WORKER_MULTIPROC_METHOD=spawn # Required for vLLM
 MODEL=deepseek-ai/DeepSeek-R1-Distill-Qwen-1.5B
-MODEL_ARGS="pretrained=$MODEL,dtype=bfloat16,max_model_length=32768,gpu_memory_utilization=0.8,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
+MODEL_ARGS="model_name=$MODEL,dtype=bfloat16,max_model_length=32768,gpu_memory_utilization=0.8,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
 OUTPUT_DIR=data/evals/$MODEL
 
 # AIME 2024
 TASK=aime24
-lighteval vllm $MODEL_ARGS "custom|$TASK|0|0" \
-    --custom-tasks src/open_r1/evaluate.py \
+lighteval vllm $MODEL_ARGS "lighteval|$TASK|0|0" \
     --use-chat-template \
     --output-dir $OUTPUT_DIR
 
 # MATH-500
 TASK=math_500
-lighteval vllm $MODEL_ARGS "custom|$TASK|0|0" \
-    --custom-tasks src/open_r1/evaluate.py \
+lighteval vllm $MODEL_ARGS "lighteval|$TASK|0|0" \
     --use-chat-template \
     --output-dir $OUTPUT_DIR
 
 # GPQA Diamond
 TASK=gpqa:diamond
-lighteval vllm $MODEL_ARGS "custom|$TASK|0|0" \
-    --custom-tasks src/open_r1/evaluate.py \
+lighteval vllm $MODEL_ARGS "lighteval|$TASK|0|0" \
     --use-chat-template \
     --output-dir $OUTPUT_DIR
 
@@ -308,22 +475,18 @@ lighteval vllm $MODEL_ARGS "extended|lcb:codegeneration|0|0" \
     --output-dir $OUTPUT_DIR 
 ```
 
-> [!IMPORTANT]
-> You must set `max_model_length=32768` in the `vllm` command to align with the `max_new_tokens` we define per eval. Without this, `lighteval` will throw an error.
-
 To increase throughput across multiple GPUs, use _data parallel_ as follows:
 
 ```shell
 NUM_GPUS=8
 MODEL=deepseek-ai/DeepSeek-R1-Distill-Qwen-1.5B
-MODEL_ARGS="pretrained=$MODEL,dtype=bfloat16,data_parallel_size=$NUM_GPUS,max_model_length=32768,gpu_memory_utilization=0.8,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
+MODEL_ARGS="model_name=$MODEL,dtype=bfloat16,data_parallel_size=$NUM_GPUS,max_model_length=32768,gpu_memory_utilization=0.8,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
 TASK=aime24
 OUTPUT_DIR=data/evals/$MODEL
 
-lighteval vllm $MODEL_ARGS "custom|$TASK|0|0" \
-    --custom-tasks src/open_r1/evaluate.py \
+lighteval vllm $MODEL_ARGS "lighteval|$TASK|0|0" \
     --use-chat-template \
-    --output-dir $OUTPUT_DIR 
+    --output-dir $OUTPUT_DIR
 ```
 
 For large models which require sharding across GPUs, use _tensor parallel_ and run:
@@ -331,15 +494,14 @@ For large models which require sharding across GPUs, use _tensor parallel_ and r
 ```shell
 NUM_GPUS=8
 MODEL=deepseek-ai/DeepSeek-R1-Distill-Qwen-32B
-MODEL_ARGS="pretrained=$MODEL,dtype=bfloat16,tensor_parallel_size=$NUM_GPUS,max_model_length=32768,gpu_memory_utilization=0.8,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
+MODEL_ARGS="model_name=$MODEL,dtype=bfloat16,tensor_parallel_size=$NUM_GPUS,max_model_length=32768,gpu_memory_utilization=0.8,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
 TASK=aime24
 OUTPUT_DIR=data/evals/$MODEL
 
 export VLLM_WORKER_MULTIPROC_METHOD=spawn
-lighteval vllm $MODEL_ARGS "custom|$TASK|0|0" \
-    --custom-tasks src/open_r1/evaluate.py \
+lighteval vllm $MODEL_ARGS "lighteval|$TASK|0|0" \
     --use-chat-template \
-    --output-dir $OUTPUT_DIR 
+    --output-dir $OUTPUT_DIR
 ```
 
 You can also launch an evaluation with `make evaluate`, specifying the model, task, and optionally the parallelism technique and number of GPUs.
@@ -364,32 +526,40 @@ make evaluate MODEL=deepseek-ai/DeepSeek-R1-Distill-Qwen-32B TASK=aime24 PARALLE
 
 ## Reproducing Deepseek's evaluation results
 
-> [!NOTE]
-> The DeepSeek-R1 paper uses sampling with 64 responses per query to estimate `pass@1`. Below, we report the results from sampling 1 response per query, which likely explains the small 1-3σ discrepancies between our results and theirs.
+The DeepSeek-R1 paper uses sampling with 4-64 responses per query to estimate `pass@1` accuracy, but does not specify the specific number of responses per benchmark. In the tables below, we estimate `pass@1` accuracy with the following number of responses per query:
+
+|   Benchmark   | Number of responses per query |
+|:-------------:|:-----------------------------:|
+|   AIME 2024   |              64               |
+|   MATH-500    |               4               |
+| GPQA Diamond  |               8               |
+| LiveCodeBench |              16               |
+
+
+Note that for benchmarks like AIME24, it is important to sample many responses as there are only 30 problems and this can introduce high variance across repeated runs. The choice of how many responses to sample per prompt likely explains the small differences between our evaluation results and those reported by DeepSeek.
 
 ### AIME 2024
 
 We are able to reproduce Deepseek's reported results on the AIME 2024 benchmark within ~1-3 standard deviations:
 
 | Model                         | AIME 2024 (🤗 LightEval) | AIME 2024 (DeepSeek Reported) |
-|:------------------------------|:-----------------------:|:----------------------------:|
-| DeepSeek-R1-Distill-Qwen-1.5B |          26.7           |             28.9             |
-| DeepSeek-R1-Distill-Qwen-7B   |          56.6           |             55.5             |
-| DeepSeek-R1-Distill-Qwen-14B  |          60.0           |             69.7             |
-| DeepSeek-R1-Distill-Qwen-32B  |          73.2           |             72.6             |
-| DeepSeek-R1-Distill-Llama-8B  |          43.3           |             50.4             |
-| DeepSeek-R1-Distill-Llama-70B |          73.3           |             70.0             |
+|:------------------------------|:------------------------:|:-----------------------------:|
+| DeepSeek-R1-Distill-Qwen-1.5B |           30.7           |             28.9              |
+| DeepSeek-R1-Distill-Qwen-7B   |           50.8           |             55.5              |
+| DeepSeek-R1-Distill-Qwen-14B  |           65.9           |             69.7              |
+| DeepSeek-R1-Distill-Qwen-32B  |           69.7           |             72.6              |
+| DeepSeek-R1-Distill-Llama-8B  |           43.9           |             41.7              |
+| DeepSeek-R1-Distill-Llama-70B |           63.0           |             70.0              |
 
 To reproduce these results use the following command:
 
 ```shell
 NUM_GPUS=1 # Set to 8 for 32B and 70B models
 MODEL=deepseek-ai/{model_name}
-MODEL_ARGS="pretrained=$MODEL,dtype=bfloat16,max_model_length=32768,gpu_memory_utilization=0.8,data_parallel_size=$NUM_GPUS,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
+MODEL_ARGS="model_name=$MODEL,dtype=bfloat16,max_model_length=32768,gpu_memory_utilization=0.8,data_parallel_size=$NUM_GPUS,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
 OUTPUT_DIR=data/evals/$MODEL
 
-lighteval vllm $MODEL_ARGS "custom|aime24|0|0" \
-    --custom-tasks src/open_r1/evaluate.py \
+lighteval vllm $MODEL_ARGS "lighteval|aime24|0|0" \
     --use-chat-template \
     --output-dir $OUTPUT_DIR
 ```
@@ -406,23 +576,23 @@ We are able to reproduce Deepseek's reported results on the MATH-500 benchmark w
 
 | Model                         | MATH-500 (🤗 LightEval) | MATH-500 (DeepSeek Reported) |
 |:------------------------------|:-----------------------:|:----------------------------:|
-| DeepSeek-R1-Distill-Qwen-1.5B |          84.6           |             83.9             |
-| DeepSeek-R1-Distill-Qwen-7B   |          93.0           |             92.8             |
-| DeepSeek-R1-Distill-Qwen-14B  |          95.0           |             93.9             |
-| DeepSeek-R1-Distill-Qwen-32B  |          96.6           |             94.3             |
+| DeepSeek-R1-Distill-Qwen-1.5B |          83.1           |             83.9             |
+| DeepSeek-R1-Distill-Qwen-7B   |          94.5           |             92.8             |
+| DeepSeek-R1-Distill-Qwen-14B  |          94.1           |             93.9             |
+| DeepSeek-R1-Distill-Qwen-32B  |          95.6           |             94.3             |
 | DeepSeek-R1-Distill-Llama-8B  |          88.6           |             89.1             |
-| DeepSeek-R1-Distill-Llama-70B |          96.4           |             94.5             |
+| DeepSeek-R1-Distill-Llama-70B |          95.1           |             94.5             |
 
 To reproduce these results use the following command:
 
 ```shell
+export VLLM_WORKER_MULTIPROC_METHOD=spawn
 NUM_GPUS=1 # Set to 8 for 32B and 70B models
 MODEL=deepseek-ai/{model_name}
-MODEL_ARGS="pretrained=$MODEL,dtype=bfloat16,max_model_length=32768,gpu_memory_utilization=0.8,data_parallel_size=$NUM_GPUS,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
+MODEL_ARGS="model_name=$MODEL,dtype=bfloat16,max_model_length=32768,gpu_memory_utilization=0.8,data_parallel_size=$NUM_GPUS,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
 OUTPUT_DIR=data/evals/$MODEL
 
-lighteval vllm $MODEL_ARGS "custom|math_500|0|0" \
-    --custom-tasks src/open_r1/evaluate.py \
+lighteval vllm $MODEL_ARGS "lighteval|math_500|0|0" \
     --use-chat-template \
     --output-dir $OUTPUT_DIR
 ```
@@ -439,23 +609,23 @@ We are able to reproduce Deepseek's reported results on the GPQA Diamond benchma
 
 | Model                         | GPQA Diamond (🤗 LightEval) | GPQA Diamond (DeepSeek Reported) |
 |:------------------------------|:---------------------------:|:--------------------------------:|
-| DeepSeek-R1-Distill-Qwen-1.5B |            34.3             |               33.8               |
+| DeepSeek-R1-Distill-Qwen-1.5B |            35.8             |               33.8               |
 | DeepSeek-R1-Distill-Qwen-7B   |            50.5             |               49.1               |
-| DeepSeek-R1-Distill-Qwen-14B  |            59.6             |               59.1               |
-| DeepSeek-R1-Distill-Qwen-32B  |            63.6             |               62.1               |
-| DeepSeek-R1-Distill-Llama-8B  |            52.0             |               49.0               |
-| DeepSeek-R1-Distill-Llama-70B |            67.2             |               65.2               |
+| DeepSeek-R1-Distill-Qwen-14B  |            61.5             |               59.1               |
+| DeepSeek-R1-Distill-Qwen-32B  |            63.1             |               62.1               |
+| DeepSeek-R1-Distill-Llama-8B  |            46.7             |               49.0               |
+| DeepSeek-R1-Distill-Llama-70B |            67.4             |               65.2               |
 
 To reproduce these results use the following command:
 
 ```shell
+export VLLM_WORKER_MULTIPROC_METHOD=spawn
 NUM_GPUS=1 # Set to 8 for 32B and 70B models
-MODEL=deepseek-ai/{model_name}
-MODEL_ARGS="pretrained=$MODEL,dtype=bfloat16,max_model_length=32768,gpu_memory_utilization=0.8,data_parallel_size=$NUM_GPUS,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
+MODEL=deepseek-ai/DeepSeek-R1-Distill-Qwen-1.5B
+MODEL_ARGS="model_name=$MODEL,dtype=bfloat16,max_model_length=32768,gpu_memory_utilization=0.8,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
 OUTPUT_DIR=data/evals/$MODEL
 
-lighteval vllm $MODEL_ARGS "custom|gpqa:diamond|0|0" \
-    --custom-tasks src/open_r1/evaluate.py \
+lighteval vllm $MODEL_ARGS "lighteval|gpqa:diamond|0|0" \
     --use-chat-template \
     --output-dir $OUTPUT_DIR
 ```
@@ -469,20 +639,20 @@ python scripts/run_benchmarks.py --model-id {model_id}  --benchmarks gpqa
 We are able to reproduce Deepseek's reported results on the LiveCodeBench code generation benchmark within ~1-3 standard deviations:
 
 | Model                         | LiveCodeBench (🤗 LightEval) | LiveCodeBench (DeepSeek Reported) |
-|:------------------------------|:----------------------------:|:--------------------------------:|
-| DeepSeek-R1-Distill-Qwen-1.5B |             16.3             |               16.9               |
-| DeepSeek-R1-Distill-Qwen-7B   |             36.6             |               37.6               |
-| DeepSeek-R1-Distill-Qwen-14B  |             51.5             |               53.1               |
-| DeepSeek-R1-Distill-Qwen-32B  |             56.6             |               57.2               |
-| DeepSeek-R1-Distill-Llama-8B  |             37.0             |               39.6               |
-| DeepSeek-R1-Distill-Llama-70B |             54.5             |               57.5               |
+|:------------------------------|:----------------------------:|:---------------------------------:|
+| DeepSeek-R1-Distill-Qwen-1.5B |             16.1             |               16.9                |
+| DeepSeek-R1-Distill-Qwen-7B   |             37.4             |               37.6                |
+| DeepSeek-R1-Distill-Qwen-14B  |             51.3             |               53.1                |
+| DeepSeek-R1-Distill-Qwen-32B  |             56.0             |               57.2                |
+| DeepSeek-R1-Distill-Llama-8B  |             37.4             |               39.6                |
+| DeepSeek-R1-Distill-Llama-70B |             55.9             |               57.5                |
 
 To reproduce these results use the following command:
 
 ```shell
 NUM_GPUS=1 # Set to 8 for 32B and 70B models, or data_parallel_size=8 with the smaller models for speed
 MODEL=deepseek-ai/{model_name}
-MODEL_ARGS="pretrained=$MODEL,dtype=bfloat16,max_model_length=32768,gpu_memory_utilization=0.8,data_parallel_size=$NUM_GPUS,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
+MODEL_ARGS="model_name=$MODEL,dtype=bfloat16,max_model_length=32768,gpu_memory_utilization=0.8,data_parallel_size=$NUM_GPUS,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
 OUTPUT_DIR=data/evals/$MODEL
 
 lighteval vllm $MODEL_ARGS "extended|lcb:codegeneration|0|0" \
@@ -581,6 +751,38 @@ sbatch slurm/generate.slurm \
 > [!NOTE]  
 > While the job is running, you can setup an SSH tunnel through the cluster login node to access the Ray dashboard from your computer running `ssh -L 8265:ray_ip_head_node:8265 <login_node>`, then browsing `http://localhost:8265`
 
+
+### Data decontamination
+
+Following [s1: Simple test-time scaling](https://huggingface.co/papers/2501.19393) the data can be decontaminated using the script at: [scripts/decontaminate.py](./scripts/decontaminate.py), which decontaminates a dataset using 8-grams and deduplicate the data. Sample run:
+
+```shell
+python scripts/decontaminate.py \
+    --dataset "open-r1/verifiable-coding-problems-python" \
+    --problem_column problem \
+    --cleanup
+```
+
+It will decontaminate against the benchmark datasets, and remove the contaminated samples afterwards. If no argument `--new_dataset_name` is provided, the same dataset will be reused, adding a `_decontaminated`. It runs against the prompt, which for this dataset is the column `problem`, but a different one can be provided.
+
+Arguments for the script:
+
+```shell
+usage: decontaminate.py [-h] --dataset DATASET [--split SPLIT] [--ngram_size NGRAM_SIZE] [--problem_column PROBLEM_COLUMN] [--cleanup] [--new_dataset_name NEW_DATASET_NAME]
+
+options:
+  -h, --help            show this help message and exit
+  --dataset DATASET     Name of the dataset to check for contamination.
+  --split SPLIT         Split to check for contamination, defaults to `train`.
+  --ngram_size NGRAM_SIZE
+                        Size of n-grams to build, defaults to 8.
+  --problem_column PROBLEM_COLUMN
+                        Name of the column containing the problem (prompt).
+  --cleanup           Whether to remove the contaminated rows before pushing the dataset.
+  --new_dataset_name NEW_DATASET_NAME
+                        New name for the dataset. If not provided, will reuse the name and add a `_decontaminated` to the name.
+```
+
 ## Contributing
 
 Contributions are welcome. Please refer to https://github.com/huggingface/open-r1/issues/23.
@@ -597,7 +799,7 @@ If you find this project is useful in your own work, please consider citing as f
 @misc{openr1,
     title = {Open R1: A fully open reproduction of DeepSeek-R1},
     url = {https://github.com/huggingface/open-r1},
-    author = {Hugging Face},
+    author = {{Hugging Face}},
     month = {January},
     year = {2025}
 }

recipes/DeepSeek-R1-Distill-Qwen-1.5B/grpo/config_demo.yaml

@@ -8,6 +8,7 @@ attn_implementation: flash_attention_2
 # We edit the DeepSeek chat template to ensure (a) the reasoning block within <think> and </think> is included in the completion and (b) the <think> tag is not part of the prefill so that the format reward works
 chat_template: "{% if not add_generation_prompt is defined %}{% set add_generation_prompt = false %}{% endif %}{% set ns = namespace(is_first=false, is_tool=false, is_output_first=true, system_prompt='') %}{%- for message in messages %}{%- if message['role'] == 'system' %}{% set ns.system_prompt = message['content'] %}{%- endif %}{%- endfor %}{{bos_token}}{{ns.system_prompt}}{%- for message in messages %}{%- if message['role'] == 'user' %}{%- set ns.is_tool = false -%}{{'<｜User｜>' + message['content']}}{%- endif %}{%- if message['role'] == 'assistant' and message['content'] is none %}{%- set ns.is_tool = false -%}{%- for tool in message['tool_calls']%}{%- if not ns.is_first %}{{'<｜Assistant｜><｜tool▁calls▁begin｜><｜tool▁call▁begin｜>' + tool['type'] + '<｜tool▁sep｜>' + tool['function']['name'] + '\\n' + '```json' + '\\n' + tool['function']['arguments'] + '\\n' + '```' + '<｜tool▁call▁end｜>'}}{%- set ns.is_first = true -%}{%- else %}{{'\\n' + '<｜tool▁call▁begin｜>' + tool['type'] + '<｜tool▁sep｜>' + tool['function']['name'] + '\\n' + '```json' + '\\n' + tool['function']['arguments'] + '\\n' + '```' + '<｜tool▁call▁end｜>'}}{{'<｜tool▁calls▁end｜><｜end▁of▁sentence｜>'}}{%- endif %}{%- endfor %}{%- endif %}{%- if message['role'] == 'assistant' and message['content'] is not none %}{%- if ns.is_tool %}{{'<｜tool▁outputs▁end｜>' + message['content'] + '<｜end▁of▁sentence｜>'}}{%- set ns.is_tool = false -%}{%- else %}{% set content = message['content'] %}{{'<｜Assistant｜>' + content + '<｜end▁of▁sentence｜>'}}{%- endif %}{%- endif %}{%- if message['role'] == 'tool' %}{%- set ns.is_tool = true -%}{%- if ns.is_output_first %}{{'<｜tool▁outputs▁begin｜><｜tool▁output▁begin｜>' + message['content'] + '<｜tool▁output▁end｜>'}}{%- set ns.is_output_first = false %}{%- else %}{{'\\n<｜tool▁output▁begin｜>' + message['content'] + '<｜tool▁output▁end｜>'}}{%- endif %}{%- endif %}{%- endfor -%}{% if ns.is_tool %}{{'<｜tool▁outputs▁end｜>'}}{% endif %}{% if add_generation_prompt and not ns.is_tool %}{{'<｜Assistant｜>'}}{% endif %}"
 dataset_name: open-r1/OpenR1-Math-220k
+dataset_prompt_column: problem
 system_prompt: "You are a helpful AI Assistant that provides well-reasoned and detailed responses. You first think about the reasoning process as an internal monologue and then provide the user with the answer. Respond in the following format: <think>\n...\n</think>\n<answer>\n...\n</answer>"
 
 # GRPO trainer config
@@ -53,4 +54,5 @@ save_strategy: "epoch"
 save_total_limit: 1
 seed: 42
 temperature: 0.7
+use_liger_kernel: true
 warmup_ratio: 0.1

recipes/Mistral-Small-24B-Instruct-2501/sft/config_openr1_math.yaml

@@ -1,42 +0,0 @@
-# To start the training, run the following command:
-# sbatch -N 4 --job-name=mistral_sft slurm/train.slurm Mistral-Small-24B-Instruct-2501 sft numina zero3
-
-model_name_or_path: mistralai/Mistral-Small-24B-Instruct-2501
-model_revision: main
-torch_dtype: bfloat16
-attn_implementation: flash_attention_2
-
-# Data training arguments
-# dataset_name: yentinglin/s1K-1.1-trl-format
-dataset_name: yentinglin/OpenR1-Math-220k-trl-format
-preprocessing_num_workers: 8
-
-# SFT trainer config
-bf16: true
-do_eval: true
-eval_strategy: no
-gradient_accumulation_steps: 4
-gradient_checkpointing: true
-gradient_checkpointing_kwargs:
-  use_reentrant: false
-hub_model_id: Mistral-Small-24B-Instruct-2501-Open-R1-Distill
-hub_strategy: every_save
-learning_rate: 2.0e-05
-log_level: info
-logging_steps: 1
-logging_strategy: steps
-lr_scheduler_type: cosine
-packing: true
-max_length: 32768
-max_steps: -1
-num_train_epochs: 5
-output_dir: data/Mistral-Small-24B-Instruct-2501-Open-R1-Distill
-overwrite_output_dir: true
-per_device_eval_batch_size: 1
-per_device_train_batch_size: 1
-push_to_hub: true
-report_to:
-- wandb
-save_strategy: epoch
-seed: 42
-warmup_ratio: 0.1

recipes/OlympicCoder-32B/sft/config_v00.00.yaml

@@ -45,5 +45,5 @@ save_only_model: true # needed to bypass FSDP errors with saving paged optimizer
 save_strategy: epoch
 save_total_limit: 1
 seed: 42
-use_liger: false # fails on multi-node
+use_liger_kernel: false # fails on multi-node
 warmup_ratio: 0.03

recipes/OlympicCoder-7B/sft/config_v00.00.yaml

@@ -42,5 +42,5 @@ report_to:
 save_strategy: epoch
 save_total_limit: 1
 seed: 42
-use_liger: true
+use_liger_kernel: true
 warmup_ratio: 0.03

recipes/OpenR1-Distill-7B/sft/config_distill.yaml

@@ -0,0 +1,48 @@
+# Config for 1 node of 8 x H100s (80GB)
+# Model arguments
+model_name_or_path: open-r1/Qwen2.5-Math-7B-RoPE-300k
+model_revision: main
+torch_dtype: bfloat16
+attn_implementation: flash_attention_2
+
+# Data training arguments
+chat_template: "{%- if tools %}\n    {{- '<|im_start|>system\\n' }}\n    {%- if messages[0]['role'] == 'system' %}\n        {{- messages[0]['content'] }}\n    {%- else %}\n        {{- 'You are Open-R1, a language model trained by Hugging Face to help users. Your role as an assistant involves thoroughly exploring questions through a systematic thinking process before providing the final precise and accurate solutions. This requires engaging in a comprehensive cycle of analysis, summarizing, exploration, reassessment, reflection, backtracing, and iteration to develop well-considered thinking process. Please structure your response into two main sections: Thought and Solution using the specified format: <think> Thought section </think> Solution section. In the Thought section, detail your reasoning process in steps. Each step should include detailed considerations such as analysing questions, summarizing relevant findings, brainstorming new ideas, verifying the accuracy of the current steps, refining any errors, and revisiting previous steps. In the Solution section, based on various attempts, explorations, and reflections from the Thought section, systematically present the final solution that you deem correct. The Solution section should be logical, accurate, and concise and detail necessary steps needed to reach the conclusion. Now, try to solve the following question through the above guidelines.' }}\n    {%- endif %}\n    {{- \"\\n\\n# Tools\\n\\nYou may call one or more functions to assist with the user query.\\n\\nYou are provided with function signatures within <tools></tools> XML tags:\\n<tools>\" }}\n    {%- for tool in tools %}\n        {{- \"\\n\" }}\n        {{- tool | tojson }}\n    {%- endfor %}\n    {{- \"\\n</tools>\\n\\nFor each function call, return a json object with function name and arguments within <tool_call></tool_call> XML tags:\\n<tool_call>\\n{\\\"name\\\": <function-name>, \\\"arguments\\\": <args-json-object>}\\n</tool_call><|im_end|>\\n\" }}\n{%- else %}\n    {%- if messages[0]['role'] == 'system' %}\n        {{- '<|im_start|>system\\n' + messages[0]['content'] + '<|im_end|>\\n' }}\n    {%- else %}\n        {{- '<|im_start|>system\\nYou are Open-R1, a language model trained by Hugging Face to help users. Your role as an assistant involves thoroughly exploring questions through a systematic thinking process before providing the final precise and accurate solutions. This requires engaging in a comprehensive cycle of analysis, summarizing, exploration, reassessment, reflection, backtracing, and iteration to develop well-considered thinking process. Please structure your response into two main sections: Thought and Solution using the specified format: <think> Thought section </think> Solution section. In the Thought section, detail your reasoning process in steps. Each step should include detailed considerations such as analysing questions, summarizing relevant findings, brainstorming new ideas, verifying the accuracy of the current steps, refining any errors, and revisiting previous steps. In the Solution section, based on various attempts, explorations, and reflections from the Thought section, systematically present the final solution that you deem correct. The Solution section should be logical, accurate, and concise and detail necessary steps needed to reach the conclusion. Now, try to solve the following question through the above guidelines.<|im_end|>\\n' }}\n    {%- endif %}\n{%- endif %}\n{%- for message in messages %}\n    {%- if (message.role == \"user\") or (message.role == \"system\" and not loop.first) or (message.role == \"assistant\" and not message.tool_calls) %}\n        {{- '<|im_start|>' + message.role + '\\n' + message.content + '<|im_end|>' + '\\n' }}\n    {%- elif message.role == \"assistant\" %}\n        {{- '<|im_start|>' + message.role }}\n        {%- if message.content %}\n            {{- '\\n' + message.content }}\n        {%- endif %}\n        {%- for tool_call in message.tool_calls %}\n            {%- if tool_call.function is defined %}\n                {%- set tool_call = tool_call.function %}\n            {%- endif %}\n            {{- '\\n<tool_call>\\n{\"name\": \"' }}\n            {{- tool_call.name }}\n            {{- '\", \"arguments\": ' }}\n            {{- tool_call.arguments | tojson }}\n            {{- '}\\n</tool_call>' }}\n        {%- endfor %}\n        {{- '<|im_end|>\\n' }}\n    {%- elif message.role == \"tool\" %}\n        {%- if (loop.index0 == 0) or (messages[loop.index0 - 1].role != \"tool\") %}\n            {{- '<|im_start|>user' }}\n        {%- endif %}\n        {{- '\\n<tool_response>\\n' }}\n        {{- message.content }}\n        {{- '\\n</tool_response>' }}\n        {%- if loop.last or (messages[loop.index0 + 1].role != \"tool\") %}\n            {{- '<|im_end|>\\n' }}\n        {%- endif %}\n    {%- endif %}\n{%- endfor %}\n{%- if add_generation_prompt %}\n    {{- '<|im_start|>assistant\\n' }}\n{%- endif %}\n"
+dataset_name: open-r1/Mixture-of-Thoughts
+dataset_config: all
+dataset_num_proc: 12
+eos_token: <|im_end|>
+
+# SFT trainer config
+bf16: true
+do_eval: false
+eval_strategy: 'no'
+gradient_accumulation_steps: 8
+gradient_checkpointing: true
+gradient_checkpointing_kwargs:
+  use_reentrant: false
+hub_model_id: OpenR1-Distill-7B
+hub_strategy: every_save
+learning_rate: 4.0e-05
+log_level: info
+logging_steps: 1
+logging_strategy: steps
+lr_scheduler_type: cosine_with_min_lr
+lr_scheduler_kwargs:
+  min_lr_rate: 0.1
+packing: false
+max_grad_norm: 0.2
+max_length: 32768
+max_steps: -1
+num_train_epochs: 5
+output_dir: data/OpenR1-Distill-7B
+overwrite_output_dir: true
+per_device_eval_batch_size: 1
+per_device_train_batch_size: 2
+push_to_hub: true
+report_to:
+- wandb
+save_strategy: epoch
+save_total_limit: 1
+seed: 42
+use_liger_kernel: true
+warmup_ratio: 0.03

recipes/OpenR1-Qwen-7B/sft/config.yaml

@@ -1,48 +0,0 @@
-# Model arguments
-# You need to download the model and manually change the rope to 300k and max_position_embeddings to 32768
-# the config file should match https://huggingface.co/open-r1/OpenR1-Qwen-7B/blob/main/config.json
-model_name_or_path: Qwen/Qwen2.5-Math-7B-Instruct 
-model_revision: main
-torch_dtype: bfloat16
-attn_implementation: sdpa
-
-# Data training arguments
-dataset_name: open-r1/OpenR1-Math-220k
-dataset_num_proc: 48
-
-#SFT hyperparam
-max_length: 32768
-weight_decay: 0.0001
-optim: adamw_torch
-lr_scheduler_type: linear
-warmup_ratio: 0.1
-learning_rate: 5.0e-05
-gradient_accumulation_steps: 2
-per_device_eval_batch_size: 1
-per_device_train_batch_size: 1
-
-# SFT trainer config
-max_steps: -1
-num_train_epochs: 3
-bf16: true
-do_eval: false
-use_liger_kernel: true
-eval_strategy: 'no'
-gradient_checkpointing: true
-gradient_checkpointing_kwargs:
-  use_reentrant: false
-hub_model_id: OpenR1-Qwen-7B-SFT
-hub_strategy: every_save
-log_level: info
-logging_steps: 5
-logging_strategy: steps
-packing: true
-output_dir: data/OpenR1-Qwen-7B-SFT
-overwrite_output_dir: true
-push_to_hub: true
-report_to:
-- wandb
-save_strategy: "steps"
-save_steps: 500
-save_total_limit: 1
-seed: 42

recipes/Qwen2.5-1.5B-Instruct/grpo/config_demo.yaml

@@ -6,6 +6,7 @@ attn_implementation: flash_attention_2
 
 # Data training arguments
 dataset_name: open-r1/OpenR1-Math-220k
+dataset_prompt_column: problem
 system_prompt: "You are a helpful AI Assistant that provides well-reasoned and detailed responses. You first think about the reasoning process as an internal monologue and then provide the user with the answer. Respond in the following format: <think>\n...\n</think>\n<answer>\n...\n</answer>"
 
 # GRPO trainer config

recipes/Qwen2.5-1.5B-Instruct/grpo/config_demo_code.yaml

@@ -6,6 +6,7 @@ attn_implementation: flash_attention_2
 
 # Data training arguments
 dataset_name: open-r1/verifiable-coding-problems-python
+dataset_prompt_column: problem_statement
 system_prompt: "You are a helpful AI Assistant that provides well-reasoned and detailed responses. You first think about the reasoning process as an internal monologue and then provide the user with the answer. Respond in the following format: <think>\n...\n</think>\n<answer>\n...\n</answer>"
 
 # GRPO trainer config

recipes/Qwen2.5-1.5B-Instruct/grpo/config_demo_code_ioi.yaml

@@ -6,6 +6,7 @@ attn_implementation: flash_attention_2
 
 # Data training arguments
 dataset_name: open-r1/ioi
+dataset_prompt_column: problem
 system_prompt: "You are a helpful AI Assistant that provides well-reasoned and detailed responses. You first think about the reasoning process as an internal monologue and then provide the user with the answer. Respond in the following format: <think>\n...\n</think>\n<answer>\n...\n</answer>"
 
 # GRPO trainer config

recipes/Qwen2.5-1.5B-Instruct/sft/config_demo.yaml

@@ -1,44 +0,0 @@
-# Model arguments
-model_name_or_path: Qwen/Qwen2.5-1.5B-Instruct
-model_revision: main
-torch_dtype: bfloat16
-attn_implementation: flash_attention_2
-
-# Data training arguments
-dataset_name: open-r1/OpenR1-Math-220k
-dataset_num_proc: 48
-
-# SFT trainer config
-bf16: true
-do_eval: false
-eval_strategy: 'no'
-gradient_accumulation_steps: 1
-gradient_checkpointing: true
-gradient_checkpointing_kwargs:
-  use_reentrant: false
-hub_model_id: Qwen2.5-1.5B-Open-R1-Distill
-hub_strategy: every_save
-learning_rate: 5.0e-05
-log_level: info
-logging_steps: 5
-logging_strategy: steps
-lr_scheduler_type: cosine_with_min_lr
-lr_scheduler_kwargs:
-  min_lr_rate: 0.1
-packing: true
-max_length: 16384
-max_steps: -1
-num_train_epochs: 1
-output_dir: data/Qwen2.5-1.5B-Open-R1-Distill
-overwrite_output_dir: true
-per_device_eval_batch_size: 16
-per_device_train_batch_size: 16
-push_to_hub: true
-report_to:
-- wandb
-save_strategy: "steps"
-save_steps: 100
-save_total_limit: 1
-seed: 42
-use_liger: true
-warmup_ratio: 0.05

recipes/Qwen2.5-7B-Instruct/grpo/config_demo.yaml

@@ -1,54 +0,0 @@
-# Model arguments
-model_name_or_path: Qwen/Qwen2.5-7B-Instruct
-model_revision: main
-torch_dtype: bfloat16
-attn_implementation: flash_attention_2
-
-# Data training arguments
-dataset_name: open-r1/OpenR1-Math-cn_k12-86k
-system_prompt: "You are a helpful AI Assistant that provides well-reasoned and detailed responses. You first think about the reasoning process as an internal monologue and then provide the user with the answer. Respond in the following format: <think>\n...\n</think>\n<answer>\n...\n</answer>"
-
-# GRPO trainer config
-beta: 0.001
-bf16: true
-do_eval: false
-eval_strategy: "no"
-use_vllm: true
-do_eval: false
-gradient_accumulation_steps: 16
-gradient_checkpointing: true
-gradient_checkpointing_kwargs:
-  use_reentrant: false
-hub_model_id: Qwen2.5-7B-Instruct-GRPO
-hub_strategy: every_save
-learning_rate: 1.0e-06
-log_completions: true
-log_level: info
-logging_first_step: true
-logging_steps: 1
-logging_strategy: steps
-lr_scheduler_type: constant_with_warmup
-max_grad_norm: 0.2
-max_prompt_length: 1024
-max_completion_length: 4096
-max_steps: -1
-num_generations: 16
-num_train_epochs: 1
-output_dir: data/Qwen2.5-7B-Instruct-GRPO
-overwrite_output_dir: true
-per_device_train_batch_size: 4
-push_to_hub: true
-report_to:
-- wandb
-reward_funcs:
-- accuracy
-- format
-reward_weights:
-- 1.0
-- 0.2
-save_strategy: "steps"
-save_steps: 0.1
-save_total_limit: 1
-seed: 42
-temperature: 0.7
-warmup_ratio: 0.1

recipes/Qwen2.5-Coder-7B-Instruct/grpo/config_codeforces.yaml

@@ -0,0 +1,80 @@
+# Model arguments
+model_name_or_path: Qwen/Qwen2.5-Coder-7B-Instruct
+model_revision: main
+torch_dtype: bfloat16
+attn_implementation: flash_attention_2
+# Data training arguments
+dataset_name: open-r1/codeforces
+dataset_prompt_column: prompt
+dataset_config: verifiable-prompts
+dataset_test_split: test
+dataset_train_split: train
+
+system_prompt: "You are a helpful AI Assistant that provides well-reasoned and detailed responses. You first think about the reasoning process as an internal monologue and then provide the user with the answer. Respond in the following format: <think>\n...\n</think>\n<answer>\n...\n</answer>"
+
+# GRPO trainer config
+callbacks:
+- push_to_hub_revision
+benchmarks:
+- lcb_v4
+beta: 0.0
+loss_type: dr_grpo
+scale_rewards: false
+bf16: true
+do_eval: false
+eval_strategy: "no"
+use_vllm: true
+vllm_device: auto
+vllm_gpu_memory_utilization: 0.7
+gradient_accumulation_steps: 32
+gradient_checkpointing: true
+gradient_checkpointing_kwargs:
+  use_reentrant: false
+hub_model_id: open-r1/Qwen2.5-Coder-7B-Instruct-Codeforces-GRPO
+hub_model_revision: v01.00
+hub_strategy: every_save
+learning_rate: 1.0e-06
+log_completions: true
+log_level: info
+logging_first_step: true
+logging_steps: 1
+logging_strategy: steps
+lr_scheduler_type: constant_with_warmup
+max_grad_norm: 0.2
+max_prompt_length: 2000
+max_completion_length: 8192
+max_steps: -1
+num_generations: 16
+# aiming for 1k optimization steps
+# total_samples_per_batch = num_gpus * grad_accumulation_steps * per_device_batch_size = 8 * 32 * 4 = 1024
+# unique_prompts_per_batch = total_samples_per_batch / num_generations = 1024 / 16 = 64
+# #dataset ~= 16k (8k * 2, for python and cpp)
+# global_steps_per_epoch = #dataset / unique_prompts_per_batch = 16k / 64 ~= 250
+# epochs_for_1k_steps = 1000/250 = 4 epochs
+num_train_epochs: 4
+output_dir: data/Qwen2.5-Coder-7B-Instruct-Codeforces-GRPO_v01.00
+overwrite_output_dir: true
+per_device_train_batch_size: 4
+push_to_hub: true
+report_to:
+- wandb
+reward_funcs:
+- cf_code
+- code_format
+reward_weights:
+- 1.0
+- 0.1
+save_strategy: "steps"
+save_steps: 0.05
+save_total_limit: 1
+seed: 42
+temperature: 0.7
+wandb_entity: huggingface
+wandb_project: open-r1
+warmup_ratio: 0.1
+
+mask_truncated_completions: true
+# for each generation, evaluate these many test cases in parallel, then check if any of them failed (0 score): if so stop evaluating
+# otherwise continue with the next batch of test cases. Useful to avoid overloading the eval server + save time on wrong solutions
+code_eval_test_batch_size: -1
+code_eval_scoring_mode: weighted_sum

recipes/Qwen2.5-Math-7B/grpo/config_simple_rl.yaml

@@ -1,51 +0,0 @@
-# Model arguments
-model_name_or_path: Qwen/Qwen2.5-Math-7B
-model_revision: main
-torch_dtype: bfloat16
-attn_implementation: flash_attention_2
-
-# Data training arguments
-dataset_name: DigitalLearningGmbH/MATH-lighteval
-dataset_config: default
-system_prompt: "You are a helpful AI Assistant, designed to provided well-reasoned and detailed responses. You FIRST think about the reasoning process as an internal monologue and then provide the user with the answer. The reasoning process MUST BE enclosed within <think> and </think> tags."
-
-# GRPO trainer config
-bf16: true
-use_vllm: true
-do_eval: true
-eval_strategy: steps
-eval_steps: 100
-gradient_accumulation_steps: 8
-gradient_checkpointing: true
-gradient_checkpointing_kwargs:
-  use_reentrant: false
-hub_model_id: Qwen-2.5-7B-Simple-RL
-hub_strategy: every_save
-learning_rate: 3.0e-06
-log_completions: true
-log_level: info
-logging_first_step: true
-logging_steps: 5
-logging_strategy: steps
-lr_scheduler_type: cosine
-max_prompt_length: 512
-max_completion_length: 1024
-max_steps: -1
-num_generations: 7
-num_train_epochs: 1
-output_dir: data/Qwen-2.5-7B-Simple-RL
-overwrite_output_dir: true
-per_device_eval_batch_size: 16
-per_device_train_batch_size: 16
-push_to_hub: true
-report_to:
-- wandb
-reward_funcs:
-- accuracy
-- format
-reward_weights:
-- 1.0
-- 1.0
-save_strategy: "no"
-seed: 42
-warmup_ratio: 0.1

recipes/README.md

@@ -1,15 +1,23 @@
 # Post-training recipes
 
+## OpenR1 Distill 7B
+
+To train the OpenR1 Distill 7B model, run:
+
+```
+sbatch --nodes=1 slurm/train.slurm --model OpenR1-Distill-7B --task sft --config distill --accelerator zero3
+```
+
 ## OlympicCoder
 
 To train the OlympicCoder models, run:
 
 ```
 # 7B
-sbatch --nodes=1 slurm/train.slurm OlympicCoder-7B sft v00.00 zero3
+sbatch --nodes=1 slurm/train.slurm --model OlympicCoder-7B --task sft --config v00.00 --accelerator zero3
 
 # 32B
-sbatch --nodes=16 slurm/train.slurm OlympicCoder-32B sft v00.00 fsdp
+sbatch --nodes=16 slurm/train.slurm --model OlympicCoder-32B --task sft --config v00.00 --accelerator fsdp
 ```
 
 Note that we found it necessary to switch to FSDP1 and paged AdamW 8-bit for the 32B model in order to fit the largest possible context size.

recipes/SmolLM2-1.7B-Instruct/sft/config.yaml

@@ -1,46 +0,0 @@
-# Model arguments
-# You can download the model and manually change the rope to 300k/500k and max_position_embeddings to 32768
-model_name_or_path: HuggingFaceTB/SmolLM2-1.7B-Instruct
-model_revision: main
-torch_dtype: bfloat16
-attn_implementation: sdpa
-
-# Data training arguments
-dataset_name: open-r1/OpenR1-Math-220k
-dataset_num_proc: 48
-
-#SFT hyperparam
-max_length: 8192 # You can set this to 32768 if you change the rope, but you need to change the config.json file 
-weight_decay: 0.0001
-optim: adamw_torch
-lr_scheduler_type: linear
-warmup_ratio: 0.1
-learning_rate: 5.0e-05
-gradient_accumulation_steps: 2
-per_device_eval_batch_size: 4
-per_device_train_batch_size: 4 # Change this depending on the context length of the model to keep a 500M GBS. 
-
-# SFT trainer config
-max_steps: -1
-num_train_epochs: 3
-bf16: true
-do_eval: false
-eval_strategy: 'no'
-gradient_checkpointing: true
-gradient_checkpointing_kwargs:
-  use_reentrant: false
-hub_model_id: OpenR1-Qwen-7B-SFT
-hub_strategy: every_save
-log_level: info
-logging_steps: 5
-logging_strategy: steps
-packing: true
-output_dir: data/OpenR1-Qwen-7B-SFT
-overwrite_output_dir: true
-push_to_hub: true
-report_to:
-- wandb
-save_strategy: "steps"
-save_steps: 500
-save_total_limit: 1
-seed: 42

recipes/SmolLM2-1.7B/sft/config.yaml

@@ -1,46 +0,0 @@
-# Model arguments
-# You can download the model and manually change the rope to 300k/500k and max_position_embeddings to 32768
-model_name_or_path: HuggingFaceTB/SmolLM2-1.7B
-model_revision: main
-torch_dtype: bfloat16
-attn_implementation: sdpa
-
-# Data training arguments
-dataset_name: open-r1/OpenR1-Math-220k 
-dataset_num_proc: 48
-
-#SFT hyperparam
-max_length: 8192 # You can set this to 32768 if you change the rope, but you need to change the config.json file 
-weight_decay: 0.0001
-optim: adamw_torch
-lr_scheduler_type: linear
-warmup_ratio: 0.1
-learning_rate: 5.0e-05
-gradient_accumulation_steps: 2
-per_device_eval_batch_size: 4
-per_device_train_batch_size: 4 # Change this depending on the context length of the model to keep a 500M GBS. 
-
-# SFT trainer config
-max_steps: -1
-num_train_epochs: 3
-bf16: true
-do_eval: false
-eval_strategy: 'no'
-gradient_checkpointing: true
-gradient_checkpointing_kwargs:
-  use_reentrant: false
-hub_model_id: OpenR1-Qwen-7B-SFT
-hub_strategy: every_save
-log_level: info
-logging_steps: 5
-logging_strategy: steps
-packing: true
-output_dir: data/OpenR1-Qwen-7B-SFT
-overwrite_output_dir: true
-push_to_hub: true
-report_to:
-- wandb
-save_strategy: "steps"
-save_steps: 500
-save_total_limit: 1
-seed: 42

recipes/dataset_filtering/config_demo.yaml

@@ -0,0 +1,28 @@
+# Model arguments
+model_name_or_path: deepseek-ai/DeepSeek-R1-Distill-Qwen-1.5B
+model_revision: main
+torch_dtype: bfloat16
+attn_implementation: flash_attention_2
+
+# Data training arguments
+# We edit the DeepSeek chat template to ensure (a) the reasoning block within <think> and </think> is included in the completion and (b) the <think> tag is not part of the prefill so that the format reward works
+chat_template: "{% if not add_generation_prompt is defined %}{% set add_generation_prompt = false %}{% endif %}{% set ns = namespace(is_first=false, is_tool=false, is_output_first=true, system_prompt='') %}{%- for message in messages %}{%- if message['role'] == 'system' %}{% set ns.system_prompt = message['content'] %}{%- endif %}{%- endfor %}{{bos_token}}{{ns.system_prompt}}{%- for message in messages %}{%- if message['role'] == 'user' %}{%- set ns.is_tool = false -%}{{'<｜User｜>' + message['content']}}{%- endif %}{%- if message['role'] == 'assistant' and message['content'] is none %}{%- set ns.is_tool = false -%}{%- for tool in message['tool_calls']%}{%- if not ns.is_first %}{{'<｜Assistant｜><｜tool▁calls▁begin｜><｜tool▁call▁begin｜>' + tool['type'] + '<｜tool▁sep｜>' + tool['function']['name'] + '\\n' + '```json' + '\\n' + tool['function']['arguments'] + '\\n' + '```' + '<｜tool▁call▁end｜>'}}{%- set ns.is_first = true -%}{%- else %}{{'\\n' + '<｜tool▁call▁begin｜>' + tool['type'] + '<｜tool▁sep｜>' + tool['function']['name'] + '\\n' + '```json' + '\\n' + tool['function']['arguments'] + '\\n' + '```' + '<｜tool▁call▁end｜>'}}{{'<｜tool▁calls▁end｜><｜end▁of▁sentence｜>'}}{%- endif %}{%- endfor %}{%- endif %}{%- if message['role'] == 'assistant' and message['content'] is not none %}{%- if ns.is_tool %}{{'<｜tool▁outputs▁end｜>' + message['content'] + '<｜end▁of▁sentence｜>'}}{%- set ns.is_tool = false -%}{%- else %}{% set content = message['content'] %}{{'<｜Assistant｜>' + content + '<｜end▁of▁sentence｜>'}}{%- endif %}{%- endif %}{%- if message['role'] == 'tool' %}{%- set ns.is_tool = true -%}{%- if ns.is_output_first %}{{'<｜tool▁outputs▁begin｜><｜tool▁output▁begin｜>' + message['content'] + '<｜tool▁output▁end｜>'}}{%- set ns.is_output_first = false %}{%- else %}{{'\\n<｜tool▁output▁begin｜>' + message['content'] + '<｜tool▁output▁end｜>'}}{%- endif %}{%- endif %}{%- endfor -%}{% if ns.is_tool %}{{'<｜tool▁outputs▁end｜>'}}{% endif %}{% if add_generation_prompt and not ns.is_tool %}{{'<｜Assistant｜>'}}{% endif %}"
+dataset_name: open-r1/OpenR1-Math-220k
+dataset_prompt_column: problem
+system_prompt: "You are a helpful AI Assistant that provides well-reasoned and detailed responses. You first think about the reasoning process as an internal monologue and then provide the user with the answer. Respond in the following format: <think>\n...\n</think>\n<answer>\n...\n</answer>"
+
+# Generation arguments
+max_completion_length: 2048
+num_generations: 8
+temperature: 0.7
+top_p: 0.95
+
+# Reward func arguments
+reward_funcs:
+- accuracy
+reward_weights:
+- 1.0
+
+# Filtering arguments. Samples with a pass rate outside the interval `pass_rate_min < x < pass_rate_max` will be filtered.  
+pass_rate_min: 0.2
+pass_rate_max: 0.8

recipes/dataset_filtering/filter_dapo.yaml

@@ -0,0 +1,28 @@
+# Model arguments
+model_name_or_path: open-r1/R1-Distill-Qwen-Math-7B
+model_revision: v03.00-step-000008190
+torch_dtype: bfloat16
+attn_implementation: flash_attention_2
+
+# Data training arguments
+# We edit the DeepSeek chat template to ensure (a) the reasoning block within <think> and </think> is included in the completion and (b) the <think> tag is not part of the prefill so that the format reward works
+dataset_name: open-r1/DAPO-Math-17k-Processed
+dataset_config: all
+dataset_split: train
+
+# Generation arguments
+max_completion_length: 32000
+num_generations: 8
+temperature: 1.0
+
+# Reward func arguments
+reward_funcs:
+- accuracy
+reward_weights:
+- 1.0
+
+# Filtering arguments. Samples with mean reward outside of low / high will be filtered
+pass_rate_min: 0.1
+pass_rate_max: 0.6
+
+output_dataset_name: open-r1/DAPO-Math-17k-Processed-R1-Distill-Qwen-Math-7B-v03.00-step-000008190-filter

recipes/dataset_filtering/filter_python.yaml

@@ -0,0 +1,26 @@
+# Model arguments
+model_name_or_path: open-r1/R1-Distill-Qwen-Math-7B-Merges
+model_revision: v00.00-step-000003660_v01.00-step-000002600_weights-0.50-0.50
+torch_dtype: bfloat16
+attn_implementation: flash_attention_2
+
+# Data training arguments
+# We edit the DeepSeek chat template to ensure (a) the reasoning block within <think> and </think> is included in the completion and (b) the <think> tag is not part of the prefill so that the format reward works
+dataset_name: open-r1/verifiable-coding-problems-python_decontaminated-tested-shuffled
+dataset_prompt_column: problem
+
+# Generation arguments
+max_completion_length: 16000
+num_generations: 8
+temperature: 0.7
+
+# Reward func arguments
+reward_funcs:
+- binary_code
+reward_weights:
+- 1.0
+e2b_router_url: ip-10-53-85-92:8000
+
+# Filtering arguments. Samples with mean reward outside of low / high will be filtered
+pass_rate_min: 0.1
+pass_rate_max: 0.6

scripts/benchmark_e2b.py

@@ -0,0 +1,85 @@
+# coding=utf-8
+# Copyright 2025 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+Benchmark script for the code_reward function with E2B.
+
+This script measures the performance of the code_reward function with varying numbers
+of samples and parallelization levels.
+
+Each sample is a CodeForces problem with a gold standard solution that is executed against a set of public test cases.
+"""
+
+from datasets import load_dataset
+import time
+from tqdm.auto import tqdm
+
+from dotenv import load_dotenv
+load_dotenv()
+
+from open_r1.rewards import code_reward
+
+def benchmark_code_reward(example):
+    start_time = time.time()
+    test_completions = [[{"content": example["gold_standard_solution"]}]]
+    reward_kwargs = {"verification_info": [example["verification_info"]]}
+    rewards = code_reward(test_completions, **reward_kwargs)
+    end_time = time.time()
+    example["test_reward"] = rewards[0]
+    example["reward_time"] = end_time - start_time
+    return example
+
+if __name__ == "__main__":
+    parallel_dict = {
+        16:[1,4,16],
+        64:[4,16, 64],
+        256:[16, 64, 96], # cap at 96 as PRO account is limited to 100
+    }
+    # Store results for table formatting
+    results = []
+    
+    for num_samples in tqdm([16, 64,256], desc="Benchmarking samples"):
+        for num_parallel in parallel_dict[num_samples]:
+            code_dataset = load_dataset("open-r1/verifiable-coding-problems-python_decontaminated")
+            code_dataset = code_dataset["train"].shuffle(seed=42).select(range(num_samples))
+
+            test_completions = [[{"content": example["gold_standard_solution"]}] for example in code_dataset]
+            reward_kwargs = {"verification_info": [example["verification_info"] for example in code_dataset]}
+
+            start_time = time.time()
+            rewards = code_reward(test_completions, num_parallel=num_parallel, **reward_kwargs)
+            execution_time = time.time() - start_time
+            
+            # Calculate some statistics about rewards
+            mean_reward = sum(rewards) / len(rewards)
+            min_reward = min(rewards)
+            max_reward = max(rewards)
+            
+            # Store results
+            results.append({
+                "num_samples": num_samples,
+                "num_parallel": num_parallel,
+                "execution_time": execution_time,
+                "mean_reward": mean_reward,
+                "min_reward": min_reward,
+                "max_reward": max_reward
+            })
+    
+    print("\n## Benchmark Results\n")
+    print("| Sample Size | Parallelization | Execution Time (s) | Mean Reward | Min Reward | Max Reward |")
+    print("|:-----------:|:---------------:|------------------:|:-----------:|:-----------:|:-----------:|")
+    
+    for result in results:
+        print(f"| {result['num_samples']:^11} | {result['num_parallel']:^15} | {result['execution_time']:17.2f} | {result['mean_reward']:^11.4f} | {result['min_reward']:^11.4f} | {result['max_reward']:^11.4f} |")
+    

scripts/decontaminate.py

@@ -15,7 +15,7 @@
 # limitations under the License.
 """
 This script is used to decontaminate a dataset by checking for n-gram overlap with other datasets.
-It uses the same approach presented in https://arxiv.org/abs/2501.19393,
+It uses the same approach presented in https://huggingface.co/papers/2501.19393,
 as found in: https://github.com/simplescaling/s1/blob/main/data/decontaminate_util.py
 
 Usage:

scripts/e2b_router.py

@@ -0,0 +1,161 @@
+# coding=utf-8
+# Copyright 2025 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import argparse
+import asyncio
+from fastapi import FastAPI
+from pydantic import BaseModel, ConfigDict
+from typing import  Optional
+from fastapi import FastAPI, Request
+import argparse
+import asyncio
+from fastapi import FastAPI
+import uvicorn
+from e2b_code_interpreter.models import Execution
+from dotenv import load_dotenv
+from e2b_code_interpreter import AsyncSandbox
+
+load_dotenv()
+
+class BatchRequest(BaseModel):
+    """
+    BatchRequest is a data model representing a batch processing request.
+
+    Attributes:
+        scripts (list[str]): A list of script names or paths to be executed.
+        languages (list[str]): The programming languages for each script in the list.
+        timeout (int): The maximum allowed execution time for each script in seconds.
+        request_timeout (int): The maximum allowed time for the entire batch request in seconds.
+    """
+    scripts: list[str]
+    languages: list[str]
+    timeout: int
+    request_timeout: int
+
+class ScriptResult(BaseModel):
+    """
+    ScriptResult is a Pydantic model that represents the result of a script execution.
+    Attributes:
+        execution (Optional[Execution]): An optional instance of the `Execution` class 
+            that contains details about the script's execution, such as status, output, 
+            or any other relevant metadata.
+        exception_str (Optional[str]): An optional string that captures the exception 
+            message or details if an error occurred during the script's execution.
+        model_config (ConfigDict): A configuration dictionary that allows arbitrary 
+            types to be used within the Pydantic model. This is necessary to support 
+            custom types like `Execution` within the model.
+    """
+    execution: Optional[Execution]
+    exception_str: Optional[str]
+    
+    # required to allow arbitrary types in pydantic models such as Execution
+    model_config = ConfigDict(arbitrary_types_allowed=True)
+    
+def create_app(args):
+    """
+    Creates and configures a FastAPI application instance.
+    Args:
+        args: An object containing configuration parameters for the application.
+              - num_sandboxes (int): The maximum number of concurrent sandboxes allowed.
+    Returns:
+        FastAPI: A configured FastAPI application instance.
+    The application includes the following endpoints:
+        1. GET /health:
+            - Returns the health status of the application.
+            - Response: {"status": "ok"}
+        2. POST /execute_batch:
+            - Executes a batch of scripts in an isolated sandbox environment.
+            - Request Body: BatchRequest object containing:
+                - languages (list[str]): The programming languages of the scripts (python or javascript).
+                - timeout (int): The maximum execution time for each script.
+                - request_timeout (int): The timeout for the request itself.
+                - scripts (List[str]): A list of scripts to execute.
+            - Response: A list of ScriptResult objects for each script, containing:
+                - execution: The result of the script execution.
+                - exception_str: Any exception encountered during execution.
+    Notes:
+        - A semaphore is used to limit the number of concurrent sandboxes.
+        - Each script execution is wrapped in a timeout to prevent hanging.
+        - Sandboxes are cleaned up after execution, even in case of errors.
+    """
+    app = FastAPI()
+
+    # Instantiate semaphore and attach it to app state
+    app.state.sandbox_semaphore = asyncio.Semaphore(args.max_num_sandboxes)
+
+    @app.get("/health")
+    async def health():
+        return {"status": "ok"}
+
+    @app.post("/execute_batch")
+    async def execute_batch(batch: BatchRequest, request: Request):
+        semaphore = request.app.state.sandbox_semaphore
+        languages = batch.languages
+        timeout = batch.timeout
+        request_timeout = batch.request_timeout
+        asyncio_timeout = batch.timeout + 1
+        
+        async def run_script(script: str, language: str) -> ScriptResult:
+
+            async with semaphore:
+                try:
+                    sandbox = await AsyncSandbox.create(
+                        timeout=timeout,
+                        request_timeout=request_timeout,
+                    )
+                    execution = await asyncio.wait_for(
+                        sandbox.run_code(script, language=language),
+                        timeout=asyncio_timeout,
+                    )
+                    return ScriptResult(execution=execution, exception_str=None)
+
+                except Exception as e:
+                    return ScriptResult(execution=None, exception_str=str(e))
+                
+                finally:
+                    try:
+                        await sandbox.kill()
+                    except Exception:
+                        pass
+
+        tasks = [run_script(script, lang) for script, lang in zip(batch.scripts, batch.languages)]
+        return await asyncio.gather(*tasks)
+
+    return app
+
+
+def parse_args():
+    """
+    Parse command-line arguments for the e2b_router script.
+
+    Arguments:
+        --host (str): The hostname or IP address to bind the server to. Defaults to "0.0.0.0" (binds to all interfaces).
+        --port (int): The port number on which the server will listen. Defaults to 8000.
+        --max_num_sandboxes (int): The maximum number of sandboxes that can be created or managed simultaneously. Defaults to 20.
+
+    Returns:
+        argparse.Namespace: Parsed command-line arguments as an object.
+    """
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--host", default="0.0.0.0")
+    parser.add_argument("--port", type=int, default=8000)
+    parser.add_argument("--max_num_sandboxes", type=int, default=20)
+    return parser.parse_args()
+
+if __name__ == "__main__":
+    args = parse_args()
+    app = create_app(args)
+
+    uvicorn.run(app, host=args.host, port=args.port)

scripts/morph_router.py

@@ -0,0 +1,173 @@
+# coding=utf-8
+# Copyright 2025 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import argparse
+import asyncio
+from fastapi import FastAPI
+from pydantic import BaseModel, ConfigDict
+from typing import Optional, List
+from fastapi import FastAPI, Request
+import uvicorn
+from dotenv import load_dotenv
+import os
+
+load_dotenv()
+
+class BatchRequest(BaseModel):
+    """
+    BatchRequest is a data model representing a batch processing request.
+
+    Attributes:
+        scripts (list[str]): A list of script names or paths to be executed.
+        languages (List[str]): The programming languages for each script in the list.
+        timeout (int): The maximum allowed execution time for each script in seconds.
+        request_timeout (int): The maximum allowed time for the entire batch request in seconds.
+    """
+    scripts: List[str]
+    languages: List[str]
+    timeout: int
+    request_timeout: int
+
+class ScriptResult(BaseModel):
+    """
+    ScriptResult is a Pydantic model that represents the result of a script execution.
+    Attributes:
+        text (Optional[str]): The output text from the script execution.
+        exception_str (Optional[str]): An optional string that captures the exception 
+            message or details if an error occurred during the script's execution.
+        model_config (ConfigDict): A configuration dictionary that allows arbitrary 
+            types to be used within the Pydantic model.
+    """
+    text: Optional[str]
+    exception_str: Optional[str]
+    
+    
+    model_config = ConfigDict(arbitrary_types_allowed=True)
+    
+def create_app(args):
+    """
+    Creates and configures a FastAPI application instance for the MorphCloud router.
+    
+    Args:
+        args: An object containing configuration parameters for the application.
+              - max_num_sandboxes (int): The maximum number of concurrent sandboxes allowed.
+              - api_key (str): The MorphCloud API key to use.
+    
+    Returns:
+        FastAPI: A configured FastAPI application instance.
+    """
+    app = FastAPI()
+    
+    from morphcloud.api import MorphCloudClient
+    from morphcloud.sandbox import Sandbox
+    
+    app.state.client = MorphCloudClient(api_key=args.api_key)
+    app.state.Sandbox = Sandbox
+
+    app.state.sandbox_semaphore = asyncio.Semaphore(args.max_num_sandboxes)
+
+    @app.get("/health")
+    async def health():
+        return {"status": "ok"}
+
+    @app.post("/execute_batch")
+    async def execute_batch(batch: BatchRequest, request: Request):
+        semaphore = request.app.state.sandbox_semaphore
+        client = request.app.state.client
+        Sandbox = request.app.state.Sandbox
+        
+        languages = batch.languages
+        timeout = batch.timeout
+        request_timeout = batch.request_timeout
+        asyncio_timeout = batch.timeout + 1
+        
+        async def run_script(script: str, language: str) -> ScriptResult:
+            sandbox = None
+            sandbox_id = "unknown"
+
+            async with semaphore:
+                try:
+                    sandbox = await asyncio.to_thread(
+                        Sandbox.new,
+                        client=client,
+                        ttl_seconds=timeout
+                    )
+                    
+                    sandbox_id = getattr(sandbox, 'id', None) or getattr(sandbox._instance, 'id', 'unknown')
+                    
+                    execution = await asyncio.wait_for(
+                        asyncio.to_thread(
+                            sandbox.run_code,
+                            script,
+                            language=language,
+                            timeout=timeout * 1000  
+                        ),
+                        timeout=asyncio_timeout,
+                    )
+                    
+                    if hasattr(execution, 'text') and execution.text:
+                        return ScriptResult(text=execution.text, exception_str=None)
+                    elif hasattr(execution, 'stdout') and execution.stdout:
+                        return ScriptResult(text=execution.stdout, exception_str=None)
+                    else:
+                        return ScriptResult(text="", exception_str="No output from execution")
+
+                except Exception as e:
+                    return ScriptResult(text=None, exception_str=str(e))
+                
+                finally:
+                    if sandbox:
+                        try:
+                            await asyncio.to_thread(sandbox.close)
+                            await asyncio.to_thread(sandbox.shutdown)
+                        except Exception:
+                            pass
+
+        tasks = [run_script(script, lang) for script, lang in zip(batch.scripts, batch.languages)]
+        return await asyncio.gather(*tasks)
+
+    return app
+
+def parse_args():
+    """
+    Parse command-line arguments for the morph_router script.
+
+    Arguments:
+        --host (str): The hostname or IP address to bind the server to. Defaults to "0.0.0.0".
+        --port (int): The port number on which the server will listen. Defaults to 8001.
+        --max_num_sandboxes (int): The maximum number of sandboxes that can be created simultaneously. Defaults to 20.
+        --api_key (str): The MorphCloud API key. If not provided, it will be read from the MORPH_API_KEY environment variable.
+
+    Returns:
+        argparse.Namespace: Parsed command-line arguments as an object.
+    """
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--host", default="0.0.0.0")
+    parser.add_argument("--port", type=int, default=8001)
+    parser.add_argument("--max_num_sandboxes", type=int, default=20)
+    parser.add_argument("--api_key", default=os.getenv("MORPH_API_KEY"))
+    args = parser.parse_args()
+    
+    if not args.api_key:
+        raise ValueError("MorphCloud API key not provided. Please set MORPH_API_KEY environment variable or use --api_key.")
+    
+    return args
+
+if __name__ == "__main__":
+    args = parse_args()
+    app = create_app(args)
+    
+    print(f"Starting MorphCloud Router on {args.host}:{args.port}")
+    uvicorn.run(app, host=args.host, port=args.port)

scripts/pass_rate_filtering/README.md

@@ -0,0 +1,36 @@
+# Pass rate filtering
+
+We provide support to filter datasets by generating and computing pass rate on veriable tasks
+
+See `scripts/pass_rate_filtering/compute_pass_rate.py` and `scripts/pass_rate_filtering/launch_filtering.sh` (hardcoded for DAPO at the moment)
+
+By default the script chunks the dataset, merge can be run using the following snippet (example for DAPO) :
+
+from datasets import load_dataset, concatenate_datasets
+
+name = "open-r1/DAPO-Math-17k-Processed-R1-Distill-Qwen-Math-7B-Merges-v00.02-v01.02-0.3-0.7-filter"
+
+```python
+gen_datasets = []
+filt_datasets = []
+for start in range(0,17400,200):
+    end = start + 200
+    if start == 17200:
+        end = 17398
+    gen_config_name = f"gen-{start}-{end}"
+    gen_dataset = load_dataset(name, gen_config_name, revision="gen",  split="train")
+    gen_datasets.append(gen_dataset)
+    
+    filt_config_name = f"filt-0.1-0.6-{start}-{end}"
+    filt_dataset = load_dataset(name, filt_config_name, revision="pass_rate",  split="train")
+    filt_datasets.append(filt_dataset)
+    
+gen_dataset = concatenate_datasets(gen_datasets)
+gen_dataset.push_to_hub(name, config_name="gen", split="train")
+print(gen_dataset)
+
+filt_dataset = concatenate_datasets(filt_datasets)
+filt_dataset.push_to_hub(name, config_name="default", split="train")
+
+print(filt_dataset)
+```

scripts/pass_rate_filtering/compute_pass_rate.py

@@ -0,0 +1,205 @@
+# Copyright 2025 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# example usage python scripts/filter_dataset.py --config recipes/dataset_filtering/config_demo.yaml
+
+import logging
+from dataclasses import dataclass
+from git import Optional
+import torch
+import sys
+
+import datasets
+import transformers
+from datasets import load_dataset
+from transformers import set_seed
+
+from open_r1.configs import GRPOConfig, GRPOScriptArguments
+from open_r1.rewards import get_reward_funcs
+from open_r1.utils import get_tokenizer
+from trl import ModelConfig, TrlParser
+from trl.data_utils import apply_chat_template
+from vllm import LLM, SamplingParams
+
+logger = logging.getLogger(__name__)
+
+@dataclass
+class PassRateScriptArguments(GRPOScriptArguments):
+    # we can be lazy and just use the same script args as GRPO
+    output_dataset_name: Optional[str] = None
+    pass_rate_min: float = 0.1
+    pass_rate_max: float = 0.9
+    dataset_start_index: Optional[int] = None
+    dataset_end_index: Optional[int] = None
+    dataset_split: str = "train"
+
+
+def main(script_args, training_args, model_args):
+    # Set seed for reproducibility
+    set_seed(training_args.seed)
+
+    ###############
+    # Setup logging
+    ###############
+    logging.basicConfig(
+        format="%(asctime)s - %(levelname)s - %(name)s - %(message)s",
+        datefmt="%Y-%m-%d %H:%M:%S",
+        handlers=[logging.StreamHandler(sys.stdout)],
+    )
+    log_level = training_args.get_process_log_level()
+    logger.setLevel(log_level)
+    datasets.utils.logging.set_verbosity(log_level)
+    transformers.utils.logging.set_verbosity(log_level)
+    transformers.utils.logging.enable_default_handler()
+    transformers.utils.logging.enable_explicit_format()
+
+    logger.info(f"Model parameters {model_args}")
+    logger.info(f"Script parameters {script_args}")
+    logger.info(f"Training parameters {training_args}")
+
+    # Load the dataset
+    dataset = load_dataset(script_args.dataset_name, name=script_args.dataset_config, split=script_args.dataset_split)
+    if script_args.dataset_start_index is not None and script_args.dataset_end_index is not None:
+        dataset = dataset.select(range(script_args.dataset_start_index, script_args.dataset_end_index))
+
+    # Get reward functions from the registry
+    reward_funcs = get_reward_funcs(script_args)
+
+    # Format into conversation
+    def make_conversation(example, prompt_column: str = script_args.dataset_prompt_column):
+        example["prompt_backup"] = example[prompt_column]
+        
+        prompt = []
+
+        if training_args.system_prompt is not None:
+            prompt.append({"role": "system", "content": training_args.system_prompt})
+
+        if prompt_column not in example:
+            raise ValueError(f"Dataset Question Field Error: {prompt_column} is not supported.")
+
+        prompt.append({"role": "user", "content": example[prompt_column]})
+        return {"prompt": prompt}
+
+    dataset = dataset.map(make_conversation)
+    tokenizer = get_tokenizer(model_args, training_args)
+    
+    if "messages" in dataset.column_names:
+        dataset = dataset.remove_columns("messages")
+    
+    dataset = dataset.map(apply_chat_template, fn_kwargs={"tokenizer": tokenizer})
+    llm = LLM(
+        model=model_args.model_name_or_path,
+        revision=model_args.model_revision,
+        trust_remote_code=model_args.trust_remote_code,
+    )
+
+    sampling_params=SamplingParams(
+        temperature=training_args.temperature,
+        top_p=training_args.top_p,
+        top_k=training_args.top_k,
+        n=training_args.num_generations,
+        max_tokens=training_args.max_completion_length,
+    )
+    
+    def batch_score(examples):
+        prompts = examples["prompt"]
+        
+        outputs = llm.generate(
+            prompts,
+            sampling_params=sampling_params,
+            use_tqdm=False,
+        )
+        repeated_prompts = []
+        reward_completions = []
+        grouped_completions = []
+        for output in outputs:
+            prompt = output.prompt
+            group = []
+            for completion in output.outputs:
+                text = completion.text
+                group.append(text)
+                message = [{"role": "assistant", "content": text}]
+                repeated_prompts.append(prompt)
+                reward_completions.append(message)
+            grouped_completions.append(group)
+        
+        def repeat_each_element_k_times(list_to_repeat: list, k: int) -> list:
+            return [element for item in list_to_repeat for element in [item] * k]
+        
+        rewards_per_func = torch.zeros(len(repeated_prompts), len(reward_funcs))
+        for i, reward_func in enumerate(reward_funcs):
+            keys = [key for key in examples.data.keys() if key not in ["prompt", "completion"]]
+            reward_kwargs = {key: repeat_each_element_k_times(examples[key], training_args.num_generations) for key in keys}
+            output_reward_func = reward_func(prompts=repeated_prompts, completions=reward_completions, **reward_kwargs)
+            # Convert None values to NaN
+            output_reward_func = [reward if reward is not None else torch.nan for reward in output_reward_func]
+
+            rewards_per_func[:, i] = torch.tensor(output_reward_func, dtype=torch.float32)
+            
+        reshaped_rewards = rewards_per_func.view(-1, training_args.num_generations)
+        
+        examples["pass_rate_generations"] = grouped_completions
+        examples["pass_rate_rewards"] = reshaped_rewards.tolist()
+
+            
+        return examples
+    
+    dataset = dataset.map(batch_score, batched=True, batch_size=64)
+    
+    # we need to restore the prompt for the final dataset
+    def restore_prompt(example):
+        example["prompt"] = example["prompt_backup"]
+        return example
+    
+    dataset = dataset.map(restore_prompt)
+    dataset = dataset.remove_columns("prompt_backup")
+    
+    if script_args.output_dataset_name is not None:
+        output_dataset_name = script_args.output_dataset_name
+    else:
+        model_name = model_args.model_name_or_path
+        if "/" in model_name:
+            model_name = model_name.split("/")[-1]
+        model_revision = model_args.model_revision
+    
+        output_dataset_name = f"{script_args.dataset_name}-{model_name}-{model_revision}-gen"
+    
+    config_name="default"
+    filtered_config_name = f"filt-{script_args.pass_rate_min}-{script_args.pass_rate_max}"
+    
+    if script_args.dataset_start_index is not None and script_args.dataset_end_index is not None:
+        config_name = f"gen-{script_args.dataset_start_index}-{script_args.dataset_end_index}"
+        filtered_config_name = f"{filtered_config_name}-{script_args.dataset_start_index}-{script_args.dataset_end_index}"
+        
+    dataset.push_to_hub(output_dataset_name, config_name=config_name, revision="gen")
+    
+    def filter_func(example):
+        rewards = example["pass_rate_rewards"]
+        # get the mean of the rewards that are not None
+        mean_reward = torch.nanmean(torch.tensor(rewards, dtype=torch.float32))
+        
+        return script_args.pass_rate_min < mean_reward < script_args.pass_rate_max
+    
+    logger.info(f"Filtering dataset with low reward threshold {script_args.pass_rate_min} and high reward threshold {script_args.pass_rate_max}")
+    logger.info(f"Dataset size before filtering: {dataset}")
+    dataset = dataset.filter(filter_func)
+    logger.info(f"Dataset size after filtering: {dataset}")
+    dataset.push_to_hub(output_dataset_name, config_name=filtered_config_name, revision="pass_rate")
+    
+    
+
+if __name__ == "__main__":
+    parser = TrlParser((PassRateScriptArguments, GRPOConfig, ModelConfig))
+    script_args, training_args, model_args = parser.parse_args_and_config()
+    main(script_args, training_args, model_args)

scripts/pass_rate_filtering/launch_filtering.sh

@@ -0,0 +1,15 @@
+
+
+# a bash foor loop from 0 to 17,400 in chunks of 200
+
+for i in {0..17000..200}
+do
+  START=$i
+  END=$((i + 200))
+  echo "Processing chunk from $START to $END"
+  
+  # Submit the job to SLURM
+  sbatch slurm/compute_pass_rate.slurm recipes/dataset_filtering/filter_dapo.yaml $START $END
+done
+
+sbatch slurm/compute_pass_rate.slurm recipes/dataset_filtering/filter_dapo.yaml 17200 17398

setup.py

@@ -44,19 +44,21 @@ _deps = [
     "accelerate==1.4.0",
     "bitsandbytes>=0.43.0",
     "datasets>=3.2.0",
-    "deepspeed==0.15.4",
+    "deepspeed==0.16.8",
     "distilabel[vllm,ray,openai]>=1.5.2",
     "e2b-code-interpreter>=1.0.5",
     "einops>=0.8.0",
     "flake8>=6.0.0",
     "hf_transfer>=0.1.4",
-    "huggingface-hub[cli]>=0.19.2,<1.0",
+    "huggingface-hub[cli,hf_xet]>=0.30.2,<1.0",
     "isort>=5.12.0",
+    "jieba",  # Needed for Chinese language support
     "langdetect",  # Needed for LightEval's extended tasks
     "latex2sympy2_extended>=1.0.6",
-    "liger_kernel==0.5.3",
-    "lighteval @ git+https://github.com/huggingface/lighteval.git@ed084813e0bd12d82a06d9f913291fdbee774905",
+    "liger-kernel>=0.5.10",
+    "lighteval @ git+https://github.com/huggingface/lighteval.git@d3da6b9bbf38104c8b5e1acc86f83541f9a502d1",  # Critical bug fix for tokenizer revisions: https://github.com/huggingface/lighteval/pull/721
     "math-verify==0.5.2",  # Used for math verification in grpo
+    "morphcloud==0.1.67",
     "packaging>=23.0",
     "parameterized>=0.9.0",
     "peft>=0.14.0",
@@ -65,11 +67,13 @@ _deps = [
     "ruff>=0.9.0",
     "safetensors>=0.3.3",
     "sentencepiece>=0.1.99",
-    "torch==2.5.1",
-    "transformers==4.50.0",
-    "trl==0.16.0",
-    "vllm==0.7.2",
+    "torch==2.6.0",
+    "transformers==4.52.3",
+    "trl[vllm]==0.18.0",
     "wandb>=0.19.1",
+    "async-lru>=2.0.5",
+    "aiofiles>=24.1.0",
+    "pandas>=2.2.3",
 ]
 
 # this is a lookup table with items like:
@@ -86,12 +90,12 @@ def deps_list(*pkgs):
 
 
 extras = {}
-extras["tests"] = deps_list("pytest", "parameterized", "math-verify")
+extras["tests"] = deps_list("pytest", "parameterized", "math-verify", "jieba")
 extras["torch"] = deps_list("torch")
 extras["quality"] = deps_list("ruff", "isort", "flake8")
-extras["code"] = deps_list("e2b-code-interpreter", "python-dotenv")
+extras["code"] = deps_list("e2b-code-interpreter", "python-dotenv", "morphcloud", "jieba", "pandas", "aiofiles")
 extras["eval"] = deps_list("lighteval", "math-verify")
-extras["dev"] = extras["quality"] + extras["tests"] + extras["eval"]
+extras["dev"] = extras["quality"] + extras["tests"] + extras["eval"] + extras["code"]
 
 # core dependencies shared across the whole project - keep this to a bare minimum :)
 install_requires = [
@@ -105,13 +109,14 @@ install_requires = [
     deps["langdetect"],
     deps["latex2sympy2_extended"],
     deps["math-verify"],
-    deps["liger_kernel"],
+    deps["liger-kernel"],
     deps["packaging"],  # utilities from PyPA to e.g., compare versions
     deps["safetensors"],
     deps["sentencepiece"],
     deps["transformers"],
     deps["trl"],
     deps["wandb"],
+    deps["async-lru"],
 ]
 
 setup(

slurm/compute_pass_rate.slurm

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+#SBATCH --job-name=open-r1-compute-pass-rate
+#SBATCH --partition=hopper-prod
+#SBATCH --qos=normal
+#SBATCH --nodes=1
+#SBATCH --gpus-per-node=1
+#SBATCH --output=./logs/%x-%j.out
+#SBATCH --error=./logs/%x-%j.err
+#SBATCH --time=01-00:00:00
+#SBATCH --requeue
+
+# example usage: sbatch slurm/dataset_filter.slurm recipes/dataset_filtering/filter_dapo.yaml 0 500
+
+set -x -e
+
+source ~/.bashrc
+source openr1/bin/activate
+
+python scripts/pass_rate_filtering/compute_pass_rate.py --config $1 --dataset_start_index $2 --dataset_end_index $3

slurm/e2b_router.slurm

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+#SBATCH --partition=hopper-cpu
+#SBATCH --mem=16g
+#SBATCH --cpus-per-task=16
+#SBATCH --output=/fsx/open-r1/logs/e2b_router/%x-%j.out
+#SBATCH --error=/fsx/open-r1/logs/e2b_router/%x-%j.err
+#SBATCH --requeue
+#SBATCH --time=7-00:00:00
+
+echo "Starting job"
+set -x -e
+
+source ~/.bashrc
+source openr1/bin/activate
+
+srun python scripts/e2b_router.py

slurm/evaluate.slurm

@@ -3,13 +3,22 @@
 #SBATCH --gres=gpu:8
 #SBATCH --partition=hopper-prod
 #SBATCH --output=./logs/%x-%j.out
-#SBATCH --err=./logs/%x-%j.err
+#SBATCH --error=./logs/%x-%j.err
 #SBATCH --requeue
+#SBATCH --time=1-00:00:00
+
 
 # Specific configuration optimized for the Hugging Face Compute Cluster
 # Be ye warned this may not work on other clusters!
 module load cuda/12.4
 
+# Refresh Weka on h4 cache
+echo "Refreshing Weka filesystem..."
+find -L /fsx/h4/ -type f | xargs -d '\n' -r -n512 -P64 weka fs tier fetch
+
+# Needed for vLLM
+export VLLM_WORKER_MULTIPROC_METHOD=spawn
+
 set -x -e
 
 source ~/.bashrc
@@ -25,14 +34,11 @@ MODEL_REVISION=$4
 # $7 is reserved for system_prompt, see line 51
 NUM_GPUS=$(nvidia-smi -L | wc -l)
 
-# Set Whether to use tensor parallelism or data parallelism
+# Use TP to shard model across GPUs
 if [ "$TENSOR_PARALLEL" = "True" ]; then
-    # use TP to shard model across NUM_GPUS
-    export VLLM_WORKER_MULTIPROC_METHOD=spawn
-    # FIXME: lighteval now requires us to manually pass the generation params
-    MODEL_ARGS="pretrained=$MODEL_ID,revision=$MODEL_REVISION,trust_remote_code=$TRUST_REMOTE_CODE,dtype=bfloat16,tensor_parallel_size=$NUM_GPUS,max_model_length=32768,gpu_memory_utilization=0.8,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
+    MODEL_ARGS="model_name=$MODEL_ID,revision=$MODEL_REVISION,trust_remote_code=$TRUST_REMOTE_CODE,dtype=bfloat16,tensor_parallel_size=$NUM_GPUS,max_model_length=32768,gpu_memory_utilization=0.8,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
 else
-    MODEL_ARGS="pretrained=$MODEL_ID,revision=$MODEL_REVISION,trust_remote_code=$TRUST_REMOTE_CODE,dtype=bfloat16,data_parallel_size=$NUM_GPUS,max_model_length=32768,gpu_memory_utilization=0.8,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
+    MODEL_ARGS="model_name=$MODEL_ID,revision=$MODEL_REVISION,trust_remote_code=$TRUST_REMOTE_CODE,dtype=bfloat16,data_parallel_size=$NUM_GPUS,max_model_length=32768,gpu_memory_utilization=0.8,generation_parameters={max_new_tokens:32768,temperature:0.6,top_p:0.95}"
 fi
 
 LM_EVAL_REPO_ID="open-r1/open-r1-eval-leaderboard"
@@ -41,27 +47,14 @@ DETAILS_REPO_ID="open-r1/details-$MODEL_NAME"
 OUTPUT_DIR="eval_results/$MODEL_ID/$MODEL_REVISION/$TASK_NAME"
 # We need this flag since we run this script from training jobs that use DeepSpeed and the env vars get progated which causes errors during evaluation
 ACCELERATE_USE_DEEPSPEED=false
-# Enable fast downloads
-HF_HUB_ENABLE_HF_TRANSFER=1
 
 echo "Running lighteval script ..."
 echo "Eval results will be saved to $OUTPUT_DIR"
-# Check if "custom" is a substring of TASKS
-if [[ $TASKS == *"custom"* ]]; then
-    echo "Custom task detected. Running custom task evaluation script ..."
-    lighteval vllm "$MODEL_ARGS" $TASKS \
-    --custom-tasks "src/open_r1/evaluate.py" \
+lighteval vllm "$MODEL_ARGS" $TASKS \
     --use-chat-template \
     --output-dir $OUTPUT_DIR \
     --save-details \
-    ${7:+--system-prompt "$7"}
-else
-    lighteval vllm "$MODEL_ARGS" $TASKS \
-    --use-chat-template \
-    --output-dir $OUTPUT_DIR \
-    --save-details \
-    ${7:+--system-prompt "$7"}
-fi
+    ${7:+--system-prompt "$(echo "$7" | base64 --decode)"}
 
 OUTPUT_FILEPATHS=$(find $OUTPUT_DIR/results/ -type f \( -name "*.json" \))
 for filepath in $OUTPUT_FILEPATHS; do

slurm/generate.slurm

@@ -6,7 +6,7 @@
 #SBATCH --exclusive
 #SBATCH --gpus-per-node=8
 #SBATCH --output=./logs/%x-%j.out
-#SBATCH --err=./logs/%x-%j.err
+#SBATCH --error=./logs/%x-%j.err
 #SBATCH --time=04-00:00:00
 
 # Parse command line arguments

slurm/morph_router.slurm

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+#SBATCH --partition=hopper-cpu
+#SBATCH --mem=16g
+#SBATCH --cpus-per-task=16
+#SBATCH --output=/fsx/open-r1/logs/morph_router/%x-%j.out
+#SBATCH --err=/fsx/open-r1/logs/morph_router/%x-%j.err
+#SBATCH --requeue
+#SBATCH --time=7-00:00:00
+
+
+echo "Starting job"
+set -x -e
+
+source ~/.bashrc
+source openr1/bin/activate
+
+srun python scripts/morph_router.py --port 8001 --max_num_sandboxes 20

slurm/piston/README.md

@@ -17,10 +17,17 @@ slurm/piston/launch_piston_workers.sh 1
 ```
 
 2. Assuming it's running on `ip-10-53-86-146:1234`, send the package install request:
+
+For IOI:
 ```bash
 curl -X POST http://ip-10-53-86-146:1234/api/v2/packages -H "Content-Type: application/json" -d '{"language": "cms_ioi", "version": "1.0.0"}'
 ```
 
+For CodeForces:
+```bash
+curl -X POST http://ip-10-53-86-146:1234/api/v2/packages -H "Content-Type: application/json" -d '{"language": "codeforces", "version": "1.0.0"}'
+```
+
 3. You can now launch more workers and due to the shared mounted packages directory, they should already have the package installed.
 
 To have the main script find the workers automatically, you can export the following environment variable:
@@ -32,6 +39,7 @@ Alternatively your can add `PISTON_ENDPOINTS=slurm` to your .env file.
 You can also change `PISTON_MAX_REQUESTS_PER_ENDPOINT`, which tries to limit how many simultaneous requests each worker will handle (1 by default). Keep in mind that this is a local limit and in distributed setups, as there is no global limit, workers might sometimes be overwhelmed when some processes hit the same worker.
 
 If you would like to adapt the code to run without piston, please see the [ioi repo](https://github.com/huggingface/ioi).
+For CodeForces, you should implement the [`run`](https://github.com/guipenedo/piston/blob/master/packages/codeforces/1.0.0/run) and [`compile`](https://github.com/guipenedo/piston/blob/master/packages/codeforces/1.0.0/compile) scripts.
 
 # Piston workers (local docker)
 This will launch a single worker in a docker container. Consider launching multiple workers for better scalability. Replace 2000 with the port you want to use.
@@ -57,10 +65,16 @@ docker run -d \
 ```
 
 Install the package:
+For IOI:
 ```bash
 curl -X POST http://localhost:2000/api/v2/packages -H "Content-Type: application/json" -d '{"language": "cms_ioi", "version": "1.0.0"}'
 ```
 
+For CodeForces:
+```bash
+curl -X POST http://localhost:2000/api/v2/packages -H "Content-Type: application/json" -d '{"language": "codeforces", "version": "1.0.0"}'
+```
+
 Remember to set `PISTON_ENDPOINTS`:
 ```bash
 export PISTON_ENDPOINTS=http://localhost:2000/api/v2,http://localhost:2001/api/v2,http://localhost:2002/api/v2

slurm/train.slurm

@@ -1,12 +1,27 @@
 #!/bin/bash
-#SBATCH --job-name=open-r1-sft
+#SBATCH --job-name=open_r1
 #SBATCH --ntasks-per-node=1
 #SBATCH --exclusive
 #SBATCH --gres=gpu:8
 #SBATCH --partition=hopper-prod  # Adjust this for your cluster
 #SBATCH --output=./logs/%x-%j.out
-#SBATCH --err=./logs/%x-%j.err
+#SBATCH --error=./logs/%x-%j.err
 #SBATCH --requeue
+#SBATCH --time=3-00:00:00
+
+
+if [[ "$*" == *"--help"* ]]; then
+  echo "Usage: sbatch slurm/train.slurm [options]"
+  echo "Options:"
+  echo "  --model MODEL            Model name"
+  echo "  --task TASK              Task name (e.g. sft, grpo)"
+  echo "  --config SUFFIX          Configuration suffix (e.g. demo, v00.00)"
+  echo "  --accelerator CONFIG     Accelerator configuration name (e.g. zero3)"
+  echo "  --dp N                   Data parallelism for vLLM server (default: 1)"
+  echo "  --tp N                   Tensor parallelism for vLLM server (default: 1)"
+  echo "  --args \"ARGS\"          Optional arguments to pass to the training script"
+  exit 0
+fi
 
 # Specific configuration optimized for the Hugging Face Compute Cluster
 module load cuda/12.4
@@ -14,15 +29,85 @@ set -x -e
 
 source ~/.bashrc
 source openr1/bin/activate
+START_TIME=$(date +%s)
 echo "START TIME: $(date)"
 
-MODEL=$1
-TASK=$2
-CONFIG_SUFFIX=$3
-ACCELERATOR=$4
-OPTIONAL_ARGS=$5
+# Refresh Weka on h4 cache
+echo "Refreshing Weka filesystem..."
+find -L /fsx/h4/ -type f | xargs -d '\n' -r -n512 -P64 weka fs tier fetch
+
+# Default values
+MODEL=""
+TASK=""
+CONFIG_SUFFIX=""
+ACCELERATOR=""
+DP=1
+TP=1
+OPTIONAL_ARGS=""
+
+# Parse command line arguments
+while [[ $# -gt 0 ]]; do
+  case $1 in
+    --model)
+      MODEL="$2"
+      shift 2
+      ;;
+    --task)
+      TASK="$2"
+      shift 2
+      ;;
+    --config)
+      CONFIG_SUFFIX="$2"
+      shift 2
+      ;;
+    --accelerator)
+      ACCELERATOR="$2"
+      shift 2
+      ;;
+    --dp)
+      DP="$2"
+      shift 2
+      ;;
+    --tp)
+      TP="$2"
+      shift 2
+      ;;
+    --args)
+      OPTIONAL_ARGS="$2"
+      shift 2
+      ;;
+    *)
+      echo "Unknown option: $1"
+      echo "Use --help for usage information"
+      exit 1
+      ;;
+  esac
+done
+
+# Validate required arguments
+if [[ -z "$MODEL" || -z "$TASK" || -z "$CONFIG_SUFFIX" || -z "$ACCELERATOR" ]]; then
+  echo "Error: Missing required arguments"
+  echo "Run with --help for usage information"
+  exit 1
+fi
+
+
 CONFIG_FILE=recipes/$MODEL/$TASK/config_$CONFIG_SUFFIX.yaml
 GRAD_ACC_STEPS=$(grep 'gradient_accumulation_steps' $CONFIG_FILE | awk '{print $2}')
+
+# Split the string into individual arguments
+IFS=' ' read -ra ARGS <<< "$OPTIONAL_ARGS"
+# Loop through the arguments and find the one with "--gradient_accumulation_steps"
+for arg in "${ARGS[@]}"; do
+    if [[ "$arg" == "--gradient_accumulation_steps="* ]]; then
+        # Extract the value after the equals sign
+        GRAD_ACC_STEPS="${arg#*=}"
+        break  # Exit the loop once we find the desired argument
+    fi
+done
+
+echo "Gradient accumulation steps: $GRAD_ACC_STEPS"
+
 MODEL=$(grep 'model_name_or_path:' $CONFIG_FILE | awk '{print $2}')
 REVISION=$(grep 'model_revision:' $CONFIG_FILE | head -n 1 | awk '{print $2}')
 
@@ -43,10 +128,9 @@ fi
 if [[ "$USE_VLLM" == "true" ]]; then
      TRAIN_NODES=("${NODELIST[@]:0:$((NUM_NODES - 1))}")
      VLLM_NODE=${NODELIST[-1]} # Last node
-     TP=$(python scripts/get_tensor_parallel_size.py --model_name $MODEL --revision $REVISION --default_tp $GPUS_PER_NODE)
      WORLD_SIZE=$((WORLD_SIZE - GPUS_PER_NODE))
      NUM_NODES=$((NUM_NODES - 1))
-     srun --nodes=1 --ntasks=1 --nodelist=$VLLM_NODE trl vllm-serve --model $MODEL --revision $REVISION --tensor_parallel_size $TP &
+     srun --nodes=1 --ntasks=1 --nodelist=$VLLM_NODE trl vllm-serve --model $MODEL --revision $REVISION --tensor_parallel_size $TP --data_parallel_size $DP &
 
      OPTIONAL_ARGS="$OPTIONAL_ARGS --vllm_server_host=$VLLM_NODE"
 fi
@@ -63,7 +147,7 @@ export CMD=" \
     src/open_r1/$TASK.py --config $CONFIG_FILE $OPTIONAL_ARGS
     "
 
-export LAUNCHER="HF_HUB_ENABLE_HF_TRANSFER=1 ACCELERATE_LOG_LEVEL=info TRANSFORMERS_VERBOSITY=info accelerate launch \
+export LAUNCHER="ACCELERATE_LOG_LEVEL=info TRANSFORMERS_VERBOSITY=info accelerate launch \
     --config_file recipes/accelerate_configs/$ACCELERATOR.yaml  \
     --gradient_accumulation_steps $GRAD_ACC_STEPS \
     --num_machines $NUM_NODES \
@@ -73,19 +157,26 @@ export LAUNCHER="HF_HUB_ENABLE_HF_TRANSFER=1 ACCELERATE_LOG_LEVEL=info TRANSFORM
     --machine_rank $SLURM_PROCID \
     --rdzv_backend=c10d \
     --max_restarts 1 \
-    --role \$(hostname -s): \
     --tee 3 \
     "
 # srun error handling:
 # --wait=60: wait 60 sec after the first task terminates before terminating all remaining tasks
 # --kill-on-bad-exit=1: terminate a step if any task exits with a non-zero exit code
+NODELIST=$(IFS=,; echo "${TRAIN_NODES[*]}")
+
 SRUN_ARGS=" \
     --wait=60 \
     --kill-on-bad-exit=1 \
     --nodes=$NUM_NODES \
     --ntasks=$NUM_NODES \
-    --nodelist=$TRAIN_NODES
+    --nodelist=$NODELIST
     "
-clear; srun $SRUN_ARGS --jobid $SLURM_JOB_ID bash -c "$LAUNCHER --role \$SLURMD_NODENAME: $CMD" 2>&1
+srun $SRUN_ARGS bash -c "$LAUNCHER $CMD" 2>&1
 
-echo "END TIME: $(date)"
+END_TIME=$(date +%s)
+echo "END TIME: $(date)"
+ELAPSED_SECONDS=$((END_TIME - START_TIME))
+HOURS=$((ELAPSED_SECONDS / 3600))
+MINUTES=$(( (ELAPSED_SECONDS % 3600) / 60 ))
+SECONDS=$((ELAPSED_SECONDS % 60))
+echo "TOTAL JOB TIME: ${HOURS}h ${MINUTES}m ${SECONDS}s (${ELAPSED_SECONDS} seconds)"

src/open_r1/configs.py

@@ -14,11 +14,112 @@
 # limitations under the License.
 
 from dataclasses import dataclass, field
-from typing import Optional
+from typing import Any, Literal, Optional
 
 import trl
 
 
+@dataclass
+class DatasetConfig:
+    """Configuration for a dataset in a mixture."""
+
+    id: str
+    config: Optional[str] = None
+    split: str = "train"
+    columns: Optional[list[str]] = None
+    weight: Optional[float] = None
+
+
+@dataclass
+class DatasetMixtureConfig:
+    """Configuration for a mixture of datasets."""
+
+    datasets: list[DatasetConfig]
+    seed: int = 0
+    test_split_size: Optional[float] = None
+
+
+@dataclass
+class ScriptArguments(trl.ScriptArguments):
+    """
+    Extended version of ScriptArguments with support for dataset mixtures.
+
+    Args:
+        dataset_mixture (`dict[str, Any]` or `None`, *optional*, defaults to `None`):
+            Configuration for creating dataset mixtures with advanced options.
+            Format:
+              dataset_mixture:
+                datasets:
+                  - id: dataset_id1
+                    config: config_name
+                    columns:
+                      - col1
+                      - col2
+                    weight: 0.5
+                  - id: dataset_id2
+                    config: config_name
+                    columns:
+                      - col1
+                      - col2
+                    weight: 0.5
+                seed: 42
+                test_split_size: 0.1
+    """
+
+    # Override the dataset_name to make it optional
+    dataset_name: Optional[str] = field(
+        default=None, metadata={"help": "Dataset name. Can be omitted if using dataset_mixture."}
+    )
+    dataset_mixture: Optional[dict[str, Any]] = field(
+        default=None,
+        metadata={"help": "Configuration for creating dataset mixtures with advanced options like shuffling."},
+    )
+
+    def __post_init__(self):
+        if self.dataset_name is None and self.dataset_mixture is None:
+            raise ValueError("Either `dataset_name` or `dataset_mixture` must be provided")
+
+        if self.dataset_mixture is not None:
+            if not isinstance(self.dataset_mixture, dict) or "datasets" not in self.dataset_mixture:
+                raise ValueError(
+                    "dataset_mixture must be a dictionary with a 'datasets' key. "
+                    "Expected format: {'datasets': [...], 'seed': int}"
+                )
+
+            datasets_list = []
+            datasets_data = self.dataset_mixture.get("datasets", [])
+
+            if isinstance(datasets_data, list):
+                for dataset_config in datasets_data:
+                    datasets_list.append(
+                        DatasetConfig(
+                            id=dataset_config.get("id"),
+                            config=dataset_config.get("config"),
+                            split=dataset_config.get("split", "train"),
+                            columns=dataset_config.get("columns"),
+                            weight=dataset_config.get("weight", 1.0),
+                        )
+                    )
+            else:
+                raise ValueError("'datasets' must be a list of dataset configurations")
+
+            self.dataset_mixture = DatasetMixtureConfig(
+                datasets=datasets_list,
+                seed=self.dataset_mixture.get("seed", 0),
+                test_split_size=self.dataset_mixture.get("test_split_size", None),
+            )
+
+            # Check that column names are consistent across all dataset configs
+            columns_sets = [set(dataset.columns) for dataset in datasets_list if dataset.columns is not None]
+            if columns_sets:
+                first_columns = columns_sets[0]
+                if not all(columns == first_columns for columns in columns_sets):
+                    raise ValueError(
+                        "Column names must be consistent across all dataset configurations in a mixture. "
+                        f"Found different column sets: {[list(cols) for cols in columns_sets]}"
+                    )
+
+
 # TODO: add the shared options with a mixin to reduce code duplication
 @dataclass
 class GRPOConfig(trl.GRPOConfig):
@@ -27,21 +128,30 @@ class GRPOConfig(trl.GRPOConfig):
     """
 
     benchmarks: list[str] = field(
-        default_factory=lambda: [], metadata={"help": "The benchmarks to run after training."}
+        default_factory=lambda: [],
+        metadata={"help": "The benchmarks to run after training."},
     )
     callbacks: list[str] = field(
-        default_factory=lambda: [], metadata={"help": "The callbacks to run during training."}
+        default_factory=lambda: [],
+        metadata={"help": "The callbacks to run during training."},
     )
     chat_template: Optional[str] = field(default=None, metadata={"help": "The chat template to use."})
+    hub_model_revision: Optional[str] = field(
+        default="main", metadata={"help": "The Hub model branch to push the model to."}
+    )
+    num_completions_to_print: int = field(default=0, metadata={"help": "Number of completions to print."})
+    overwrite_hub_revision: bool = field(default=False, metadata={"help": "Whether to overwrite the Hub revision."})
+    push_to_hub_revision: bool = field(default=False, metadata={"help": "Whether to push to a Hub revision/branch."})
     system_prompt: Optional[str] = field(
         default=None,
         metadata={"help": "The optional system prompt to use."},
     )
-    hub_model_revision: Optional[str] = field(
-        default="main", metadata={"help": "The Hub model branch to push the model to."}
+    wandb_log_unique_prompts: bool = field(
+        default=True,
+        metadata={
+            "help": ("Whether to log the unique prompts to wandb. This will create a new run for each unique prompt.")
+        },
     )
-    overwrite_hub_revision: bool = field(default=False, metadata={"help": "Whether to overwrite the Hub revision."})
-    push_to_hub_revision: bool = field(default=False, metadata={"help": "Whether to push to a Hub revision/branch."})
     wandb_entity: Optional[str] = field(
         default=None,
         metadata={"help": ("The entity to store runs under.")},
@@ -50,6 +160,10 @@ class GRPOConfig(trl.GRPOConfig):
         default=None,
         metadata={"help": ("The project to store runs under.")},
     )
+    wandb_run_group: Optional[str] = field(
+        default=None,
+        metadata={"help": ("The group to store runs under.")},
+    )
 
 
 @dataclass
@@ -59,10 +173,12 @@ class SFTConfig(trl.SFTConfig):
     """
 
     benchmarks: list[str] = field(
-        default_factory=lambda: [], metadata={"help": "The benchmarks to run after training."}
+        default_factory=lambda: [],
+        metadata={"help": "The benchmarks to run after training."},
     )
     callbacks: list[str] = field(
-        default_factory=lambda: [], metadata={"help": "The callbacks to run during training."}
+        default_factory=lambda: [],
+        metadata={"help": "The callbacks to run during training."},
     )
     chat_template: Optional[str] = field(default=None, metadata={"help": "The chat template to use."})
     system_prompt: Optional[str] = field(
@@ -83,16 +199,20 @@ class SFTConfig(trl.SFTConfig):
         default=None,
         metadata={"help": ("The project to store runs under.")},
     )
+    wandb_run_group: Optional[str] = field(
+        default=None,
+        metadata={"help": ("The group to store runs under.")},
+    )
 
 
 @dataclass
-class GRPOScriptArguments(trl.ScriptArguments):
+class GRPOScriptArguments(ScriptArguments):
     """
     Script arguments for the GRPO training script.
 
     Args:
         reward_funcs (`list[str]`):
-            List of reward functions. Possible values: 'accuracy', 'format', 'reasoning_steps', 'cosine', 'repetition_penalty', 'length', 'tag_count', 'code', 'ioi_code', 'code_format'.
+            List of reward functions. Possible values: 'accuracy', 'format', 'reasoning_steps', 'cosine', 'repetition_penalty', 'length', 'tag_count', 'code', 'ioi_code', 'code_format', 'soft_overlong_punishment'.
         cosine_min_value_wrong (`float`):
             Minimum reward for cosine scaling for wrong answers.
         cosine_max_value_wrong (`float`):
@@ -105,6 +225,10 @@ class GRPOScriptArguments(trl.ScriptArguments):
             Maximum length for cosine scaling.
         code_language (`str`):
             Language for code format reward.
+        max_completion_len (`int`):
+            Maximum number of tokens in completion.
+        soft_punish_cache (`int`):
+            Minimum number of tokens in completion.
     """
 
     reward_funcs: list[str] = field(
@@ -143,6 +267,7 @@ class GRPOScriptArguments(trl.ScriptArguments):
     )
     code_language: str = field(
         default="python",
+        # '(?:python|cpp)'
         metadata={
             "help": "Language for code format reward. Based on E2B supported languages https://e2b.dev/docs/code-interpreting/supported-languages",
             "choices": ["python", "javascript", "r", "java", "bash", "cpp"],
@@ -154,3 +279,53 @@ class GRPOScriptArguments(trl.ScriptArguments):
             "help": "for each generation, evaluate these many test cases in parallel, then check if any of them failed (0 score): if so stop evaluating; otherwise continue with the next batch of test cases. Useful to avoid overloading the eval server + save time on wrong solutions"
         },
     )
+    code_eval_scoring_mode: Literal["pass_fail", "partial", "weighted_sum"] = field(
+        default="weighted_sum",
+        metadata={"help": "use fraction of passed test cases as reward. If false, use 0/1 scoring."},
+    )
+    parallel_code_exec_per_proc: int = field(
+        default=2,
+        metadata={
+            "help": "Number of parallel E2B code executions per process. Default of 2 is suitable for the Free Hobby tier of E2B with 8 GPUs used for training."
+        },
+    )
+
+    dataset_prompt_column: str = field(
+        default="prompt",
+        metadata={"help": "Column to use as prompts for training."},
+    )
+
+    e2b_router_url: Optional[str] = field(
+        default=None,
+        metadata={"help": "URL for the E2B router. See scripts/e2b_router.py"},
+    )
+
+    morph_router_url: Optional[str] = field(
+        default=None,
+        metadata={"help": "URL for the MorphCloud router. See scripts/morph_router.py"},
+    )
+
+    code_provider: Optional[str] = field(
+        default="e2b",
+        metadata={
+            "help": "Provider for code execution. Options: 'e2b', 'local', 'morph'.",
+            "choices": ["e2b", "local", "morph"],
+        },
+    )
+
+    ioi_provider: Optional[str] = field(
+        default="piston",
+        metadata={
+            "help": "Provider for IOI code execution. Options: 'piston', 'morph'.",
+            "choices": ["piston", "morph"],
+        },
+    )
+
+    max_completion_len: int = field(
+        default=16384,
+        metadata={"help": "Maximum number of characters in completion."},
+    )
+    soft_punish_cache: int = field(
+        default=4096,
+        metadata={"help": "Minimum number of characters in completion."},
+    )

src/open_r1/evaluate.py

@@ -1,185 +0,0 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Custom evaluation tasks for LightEval."""
-
-import random
-
-from lighteval.metrics.dynamic_metrics import (
-    ExprExtractionConfig,
-    IndicesExtractionConfig,
-    LatexExtractionConfig,
-    multilingual_extractive_match_metric,
-)
-from lighteval.tasks.lighteval_task import LightevalTaskConfig
-from lighteval.tasks.requests import Doc
-from lighteval.utils.language import Language
-
-
-# Prompt template adapted from
-# - simple-evals: https://github.com/openai/simple-evals/blob/6e84f4e2aed6b60f6a0c7b8f06bbbf4bfde72e58/math_eval.py#L17
-# - Llama 3: https://huggingface.co/datasets/meta-llama/Llama-3.2-1B-Instruct-evals/viewer/Llama-3.2-1B-Instruct-evals__math__details?views%5B%5D=llama_32_1b_instruct_evals__math__details
-# Note that it is important to have the final answer in a box for math-verify to work correctly
-MATH_QUERY_TEMPLATE = """
-Solve the following math problem efficiently and clearly.  The last line of your response should be of the following format: 'Therefore, the final answer is: $\\boxed{{ANSWER}}$. I hope it is correct' (without quotes) where ANSWER is just the final number or expression that solves the problem. Think step by step before answering.
-
-{Question}
-""".strip()
-
-# Prompt template from simple-evals: https://github.com/openai/simple-evals/blob/83ed7640a7d9cd26849bcb3340125002ef14abbe/common.py#L14
-GPQA_QUERY_TEMPLATE = """
-Answer the following multiple choice question. The last line of your response should be of the following format: 'Answer: $LETTER' (without quotes) where LETTER is one of ABCD. Think step by step before answering.
-
-{Question}
-
-A) {A}
-B) {B}
-C) {C}
-D) {D}
-""".strip()
-
-latex_gold_metric = multilingual_extractive_match_metric(
-    language=Language.ENGLISH,
-    fallback_mode="first_match",
-    precision=5,
-    gold_extraction_target=(LatexExtractionConfig(),),
-    # Match boxed first before trying other regexes
-    pred_extraction_target=(ExprExtractionConfig(), LatexExtractionConfig(boxed_match_priority=0)),
-    aggregation_function=max,
-)
-
-expr_gold_metric = multilingual_extractive_match_metric(
-    language=Language.ENGLISH,
-    fallback_mode="first_match",
-    precision=5,
-    gold_extraction_target=(ExprExtractionConfig(),),
-    # Match boxed first before trying other regexes
-    pred_extraction_target=(ExprExtractionConfig(), LatexExtractionConfig(boxed_match_priority=0)),
-    aggregation_function=max,
-)
-
-gpqa_metric = multilingual_extractive_match_metric(
-    language=Language.ENGLISH,
-    gold_extraction_target=[IndicesExtractionConfig(prefix_for_extraction="NativeLetters")],
-    pred_extraction_target=[IndicesExtractionConfig(prefix_for_extraction="NativeLetters")],
-    precision=5,
-)
-
-
-def math_prompt_fn(line, task_name: str = None):
-    return Doc(
-        task_name=task_name,
-        query=MATH_QUERY_TEMPLATE.format(Question=line["problem"]),
-        choices=[line["solution"]],
-        gold_index=0,
-    )
-
-
-def aime_prompt_fn(line, task_name: str = None):
-    return Doc(
-        task_name=task_name,
-        query=MATH_QUERY_TEMPLATE.format(Question=line["problem"]),
-        choices=[line["answer"]],
-        gold_index=0,
-    )
-
-
-def gpqa_prompt_fn(line, task_name: str = None):
-    gold_index = random.randint(0, 3)
-    choices = [line["Incorrect Answer 1"], line["Incorrect Answer 2"], line["Incorrect Answer 3"]]
-    choices.insert(gold_index, line["Correct Answer"])
-    query = GPQA_QUERY_TEMPLATE.format(
-        A=choices[0], B=choices[1], C=choices[2], D=choices[3], Question=line["Question"]
-    )
-    return Doc(
-        task_name=task_name,
-        query=query,
-        choices=["A", "B", "C", "D"],
-        gold_index=gold_index,
-        instruction=query,
-    )
-
-
-# Define tasks
-aime24 = LightevalTaskConfig(
-    name="aime24",
-    suite=["custom"],
-    prompt_function=aime_prompt_fn,
-    hf_repo="HuggingFaceH4/aime_2024",
-    hf_subset="default",
-    hf_avail_splits=["train"],
-    evaluation_splits=["train"],
-    few_shots_split=None,
-    few_shots_select=None,
-    generation_size=32768,
-    metric=[expr_gold_metric],
-    version=1,
-)
-aime25 = LightevalTaskConfig(
-    name="aime25",
-    suite=["custom"],
-    prompt_function=aime_prompt_fn,
-    hf_repo="yentinglin/aime_2025",
-    hf_subset="default",
-    hf_avail_splits=["train"],
-    evaluation_splits=["train"],
-    few_shots_split=None,
-    few_shots_select=None,
-    generation_size=32768,
-    metric=[expr_gold_metric],
-    version=1,
-)
-math_500 = LightevalTaskConfig(
-    name="math_500",
-    suite=["custom"],
-    prompt_function=math_prompt_fn,
-    hf_repo="HuggingFaceH4/MATH-500",
-    hf_subset="default",
-    hf_avail_splits=["test"],
-    evaluation_splits=["test"],
-    few_shots_split=None,
-    few_shots_select=None,
-    generation_size=32768,
-    metric=[latex_gold_metric],
-    version=1,
-)
-gpqa_diamond = LightevalTaskConfig(
-    name="gpqa:diamond",
-    suite=["custom"],
-    prompt_function=gpqa_prompt_fn,
-    hf_repo="Idavidrein/gpqa",
-    hf_subset="gpqa_diamond",
-    hf_avail_splits=["train"],
-    evaluation_splits=["train"],
-    few_shots_split=None,
-    few_shots_select=None,
-    generation_size=32768,  # needed for reasoning models like R1
-    metric=[gpqa_metric],
-    stop_sequence=[],  # no stop sequence, will use eos token
-    trust_dataset=True,
-    version=1,
-)
-
-
-# Add tasks to the table
-TASKS_TABLE = []
-TASKS_TABLE.append(aime24)
-TASKS_TABLE.append(aime25)
-TASKS_TABLE.append(math_500)
-TASKS_TABLE.append(gpqa_diamond)
-
-# MODULE LOGIC
-if __name__ == "__main__":
-    print([t["name"] for t in TASKS_TABLE])
-    print(len(TASKS_TABLE))

src/open_r1/generate.py

@@ -53,7 +53,7 @@ def build_distilabel_pipeline(
                 generation_kwargs=generation_kwargs,
             ),
             template=prompt_template,
-            input_mappings={"instruction": prompt_column} if prompt_column is not None else {},
+            input_mappings=({"instruction": prompt_column} if prompt_column is not None else {}),
             input_batch_size=input_batch_size,
             num_generations=num_generations,
             group_generations=True,

src/open_r1/grpo.py

@@ -17,15 +17,13 @@ import os
 import sys
 
 import datasets
-import torch
 import transformers
-from datasets import load_dataset
 from transformers import set_seed
 from transformers.trainer_utils import get_last_checkpoint
 
 from open_r1.configs import GRPOConfig, GRPOScriptArguments
 from open_r1.rewards import get_reward_funcs
-from open_r1.utils import get_tokenizer
+from open_r1.utils import get_dataset, get_model, get_tokenizer
 from open_r1.utils.callbacks import get_callbacks
 from open_r1.utils.wandb_logging import init_wandb_training
 from trl import GRPOTrainer, ModelConfig, TrlParser, get_peft_config
@@ -73,24 +71,33 @@ def main(script_args, training_args, model_args):
         init_wandb_training(training_args)
 
     # Load the dataset
-    dataset = load_dataset(script_args.dataset_name, name=script_args.dataset_config)
+    dataset = get_dataset(script_args)
 
     ################
     # Load tokenizer
     ################
     tokenizer = get_tokenizer(model_args, training_args)
 
+    ##############
+    # Load model #
+    ##############
+    logger.info("*** Loading model ***")
+    model = get_model(model_args, training_args)
+
     # Get reward functions from the registry
     reward_funcs = get_reward_funcs(script_args)
 
     # Format into conversation
-    def make_conversation(example):
+    def make_conversation(example, prompt_column: str = script_args.dataset_prompt_column):
         prompt = []
 
         if training_args.system_prompt is not None:
             prompt.append({"role": "system", "content": training_args.system_prompt})
 
-        prompt.append({"role": "user", "content": example["problem"]})
+        if prompt_column not in example:
+            raise ValueError(f"Dataset Question Field Error: {prompt_column} is not supported.")
+
+        prompt.append({"role": "user", "content": example[prompt_column]})
         return {"prompt": prompt}
 
     dataset = dataset.map(make_conversation)
@@ -99,28 +106,15 @@ def main(script_args, training_args, model_args):
         if "messages" in dataset[split].column_names:
             dataset[split] = dataset[split].remove_columns("messages")
 
-    logger.info("*** Initializing model kwargs ***")
-    torch_dtype = (
-        model_args.torch_dtype if model_args.torch_dtype in ["auto", None] else getattr(torch, model_args.torch_dtype)
-    )
-    model_kwargs = dict(
-        revision=model_args.model_revision,
-        trust_remote_code=model_args.trust_remote_code,
-        attn_implementation=model_args.attn_implementation,
-        torch_dtype=torch_dtype,
-        use_cache=False if training_args.gradient_checkpointing else True,
-    )
-    training_args.model_init_kwargs = model_kwargs
-
     #############################
     # Initialize the GRPO trainer
     #############################
     trainer = GRPOTrainer(
-        model=model_args.model_name_or_path,
+        model=model,
         reward_funcs=reward_funcs,
         args=training_args,
         train_dataset=dataset[script_args.dataset_train_split],
-        eval_dataset=dataset[script_args.dataset_test_split] if training_args.eval_strategy != "no" else None,
+        eval_dataset=(dataset[script_args.dataset_test_split] if training_args.eval_strategy != "no" else None),
         peft_config=get_peft_config(model_args),
         callbacks=get_callbacks(training_args, model_args),
         processing_class=tokenizer,
@@ -146,6 +140,9 @@ def main(script_args, training_args, model_args):
     # Save model and create model card
     ##################################
     logger.info("*** Save model ***")
+    # Align the model's generation config with the tokenizer's eos token
+    # to avoid unbounded generation in the transformers `pipeline()` function
+    trainer.model.generation_config.eos_token_id = tokenizer.eos_token_id
     trainer.save_model(training_args.output_dir)
     logger.info(f"Model saved to {training_args.output_dir}")
 

src/open_r1/rewards.py

@@ -1,3 +1,18 @@
+# coding=utf-8
+# Copyright 2025 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 """Reward functions for GRPO training."""
 
 import asyncio
@@ -5,25 +20,24 @@ import json
 import math
 import re
 from functools import partial, update_wrapper
-from typing import Callable, Dict
+from typing import Callable, Dict, Literal, Optional
 
 from latex2sympy2_extended import NormalizationConfig
 from math_verify import LatexExtractionConfig, parse, verify
 
-from .utils import is_e2b_available
-from .utils.ioi import SubtaskResult, add_includes, get_piston_client_from_env, score_subtask
+from .utils.code_providers import get_provider
+from .utils.competitive_programming import (
+    SubtaskResult,
+    add_includes,
+    get_morph_client_from_env,
+    get_piston_client_from_env,
+)
+from .utils.competitive_programming import patch_code as cf_patch_code
+from .utils.competitive_programming import score_submission as cf_score_submission
+from .utils.competitive_programming import score_subtask
 
 
-if is_e2b_available():
-    from dotenv import load_dotenv
-    from e2b_code_interpreter import AsyncSandbox
-
-    load_dotenv()
-else:
-    AsyncSandbox = None
-
-
-def accuracy_reward(completions, solution, **kwargs):
+def accuracy_reward(completions: list[list[dict[str, str]]], solution: list[str], **kwargs) -> list[Optional[float]]:
     """Reward function that checks if the completion is the same as the ground truth."""
     contents = [completion[0]["content"] for completion in completions]
     rewards = []
@@ -31,7 +45,6 @@ def accuracy_reward(completions, solution, **kwargs):
         gold_parsed = parse(
             sol,
             extraction_mode="first_match",
-            extraction_config=[LatexExtractionConfig()],
         )
         if len(gold_parsed) != 0:
             # We require the answer to be provided in correct latex (no malformed operators)
@@ -54,15 +67,15 @@ def accuracy_reward(completions, solution, **kwargs):
                 ],
                 extraction_mode="first_match",
             )
-            # Reward 1 if the content is the same as the ground truth, 0 otherwise
+            # Compute binary rewards if verifiable, `None` otherwise to skip this example
             try:
-                reward = float(verify(answer_parsed, gold_parsed))
+                reward = float(verify(gold_parsed, answer_parsed))
             except Exception as e:
                 print(f"verify failed: {e}, answer: {answer_parsed}, gold: {gold_parsed}")
-                reward = 0.0
+                reward = None
         else:
-            # If the gold solution is not parseable, we reward 1 to skip this example
-            reward = 1.0
+            # If the gold solution is not parseable, we assign `None` to skip this example
+            reward = None
             print("Failed to parse gold solution: ", sol)
         rewards.append(reward)
 
@@ -119,7 +132,7 @@ def reasoning_steps_reward(completions, **kwargs):
 def len_reward(completions: list[Dict[str, str]], solution: list[str], **kwargs) -> float:
     """Compute length-based rewards to discourage overthinking and promote token efficiency.
 
-    Taken from the Kimi 1.5 tech report: https://arxiv.org/abs/2501.12599
+    Taken from the Kimi 1.5 tech report: https://huggingface.co/papers/2501.12599
 
     Args:
         completions: List of model completions
@@ -217,7 +230,11 @@ def get_cosine_scaled_reward(
         rewards = []
 
         for content, sol in zip(contents, solution):
-            gold_parsed = parse(sol, extraction_mode="first_match", extraction_config=[LatexExtractionConfig()])
+            gold_parsed = parse(
+                sol,
+                extraction_mode="first_match",
+                extraction_config=[LatexExtractionConfig()],
+            )
             if len(gold_parsed) == 0:
                 rewards.append(1.0)  # Skip unparseable examples
                 print("Failed to parse gold solution: ", sol)
@@ -265,21 +282,41 @@ def get_cosine_scaled_reward(
     return cosine_scaled_reward
 
 
-def get_repetition_penalty_reward(ngram_size: int, max_penalty: float):
+def get_repetition_penalty_reward(ngram_size: int, max_penalty: float, language: str = "en"):
     """
-    Computes N-gram repetition penalty as described in Appendix C.2 of https://arxiv.org/abs/2502.03373.
+    Computes N-gram repetition penalty as described in Appendix C.2 of https://huggingface.co/papers/2502.03373.
     Reference implementation from: https://github.com/eddycmu/demystify-long-cot/blob/release/openrlhf/openrlhf/reward/repetition.py
 
     Args:
     ngram_size: size of the n-grams
     max_penalty: Maximum (negative) penalty for wrong answers
+    language: Language of the text, defaults to `en`. Used to choose the way to split the text into n-grams.
     """
     if max_penalty > 0:
         raise ValueError(f"max_penalty {max_penalty} should not be positive")
 
-    def zipngram(text: str, ngram_size: int):
-        words = text.lower().split()
-        return zip(*[words[i:] for i in range(ngram_size)])
+    if language == "en":
+
+        def zipngram(text: str, ngram_size: int):
+            words = text.lower().split()
+            return zip(*[words[i:] for i in range(ngram_size)]), words
+
+    elif language == "zh":
+        from transformers.utils.import_utils import _is_package_available
+
+        if not _is_package_available("jieba"):
+            raise ValueError("Please install jieba to use Chinese language")
+
+        def zipngram(text: str, ngram_size: int):
+            import jieba
+
+            seg_list = list(jieba.cut(text))
+            return zip(*[seg_list[i:] for i in range(ngram_size)]), seg_list
+
+    else:
+        raise ValueError(
+            f"Word splitting for language `{language}` is not yet implemented. Please implement your own zip-ngram function."
+        )
 
     def repetition_penalty_reward(completions, **kwargs) -> float:
         """
@@ -296,13 +333,16 @@ def get_repetition_penalty_reward(ngram_size: int, max_penalty: float):
             if completion == "":
                 rewards.append(0.0)
                 continue
-            if len(completion.split()) < ngram_size:
-                rewards.append(0.0)
-                continue
 
             ngrams = set()
             total = 0
-            for ng in zipngram(completion, ngram_size):
+            ngram_array, words = zipngram(completion, ngram_size)
+
+            if len(words) < ngram_size:
+                rewards.append(0.0)
+                continue
+
+            for ng in ngram_array:
                 ngrams.add(ng)
                 total += 1
 
@@ -315,6 +355,7 @@ def get_repetition_penalty_reward(ngram_size: int, max_penalty: float):
 
 
 def _init_event_loop():
+    """Initialize or get the current event loop."""
     try:
         loop = asyncio.get_event_loop()
     except RuntimeError:
@@ -323,15 +364,24 @@ def _init_event_loop():
     return loop
 
 
-def ioi_code_reward(completions, test_batch_size: int = 1, **kwargs) -> list[float]:
-    """Reward function that evaluates IOI problems using Piston+our IOI package.
+def ioi_code_reward(completions, test_batch_size: int = 1, provider_type: str = "piston", **kwargs) -> list[float]:
+    """Reward function that evaluates IOI problems using a specified execution client.
 
     Assumes the dataset has the same format as hf.co/datasets/open-r1/ioi
 
-    test_batch_size: evaluate these many test cases in parallel, then check if any of them failed (0 score): if so stop evaluating; otherwise continue with the next batch of test cases.
+    Args:
+        completions: List of model completions to evaluate
+        test_batch_size: Evaluate these many test cases in parallel, then check if any of them failed (0 score):
+                       if so stop evaluating; otherwise continue with the next batch of test cases.
+        provider_type: The execution provider to use (default: "piston"). Supported values: "piston", "morph"
+        **kwargs: Additional arguments passed from the dataset
     """
-    # for info on setting up piston workers, see slurm/piston/README.md
-    piston_client = get_piston_client_from_env()
+    # Get the appropriate client based on provider_type
+    if provider_type == "morph":
+        execution_client = get_morph_client_from_env()
+    else:
+        # for info on setting up piston workers, see slurm/piston/README.md
+        execution_client = get_piston_client_from_env()
 
     code_snippets = [
         # note: grading is automatically skipped if no code is extracted
@@ -343,16 +393,22 @@ def ioi_code_reward(completions, test_batch_size: int = 1, **kwargs) -> list[flo
         try:
             return await task
         except Exception as e:
-            print(f"Error from Piston worker: {e}")
-            return SubtaskResult()  # score 0.0
+            print(f"Error from {provider_type} worker: {e}")
+            return SubtaskResult()
 
-    # load problem data. undo separating kwargs by column
     problems_data = [dict(zip(kwargs.keys(), values)) for values in zip(*kwargs.values())]
 
     loop = _init_event_loop()
     evals = [
         loop.create_task(
-            run_catch_exceptions(score_subtask(piston_client, problem_data, code, test_batch_size=test_batch_size))
+            run_catch_exceptions(
+                score_subtask(
+                    execution_client,
+                    problem_data,
+                    code,
+                    test_batch_size=test_batch_size,
+                )
+            )
         )
         for problem_data, code in zip(problems_data, code_snippets)
     ]
@@ -361,32 +417,115 @@ def ioi_code_reward(completions, test_batch_size: int = 1, **kwargs) -> list[flo
     return [result.score for result in results]
 
 
-def extract_code(completion: str, language: str = "python") -> str:
+def cf_code_reward(
+    completions,
+    test_batch_size: int = 1,
+    patch_code: bool = False,
+    scoring_mode: Literal["pass_fail", "partial", "weighted_sum"] = "weighted_sum",
+    **kwargs,
+) -> list[float]:
+    """Reward function that evaluates Codeforces problems using Piston+our CF package.
+
+    Assumes the dataset has the same format as hf.co/datasets/open-r1/codeforces (verifiable-prompts subset)
+
+    test_batch_size: evaluate these many test cases in parallel, then check if any of them failed (0 score): if so stop evaluating; otherwise continue with the next batch of test cases.
+    """
+    # for info on setting up piston workers, see slurm/piston/README.md
+    piston_client = get_piston_client_from_env()
+
+    languages = kwargs["language"] if "language" in kwargs else [None] * len(completions)
+    code_snippets = [
+        # note: grading is automatically skipped if a problem has no tests
+        cf_patch_code(extract_code(completion[-1]["content"], language), language)
+        if patch_code
+        else extract_code(completion[-1]["content"], language)
+        for completion, language in zip(completions, languages)
+    ]
+
+    async def run_catch_exceptions(task):
+        try:
+            return await task
+        except Exception as e:
+            print(f"Error from Piston worker: {e}")
+            return None
+
+    # load problem data. undo separating kwargs by column
+    problems_data = [dict(zip(kwargs.keys(), values)) for values in zip(*kwargs.values())]
+
+    loop = _init_event_loop()
+    evals = [
+        loop.create_task(
+            run_catch_exceptions(
+                cf_score_submission(
+                    piston_client,
+                    problem_data,
+                    code,
+                    test_batch_size=test_batch_size,
+                    scoring_mode=scoring_mode,
+                    submission_language=problem_data.get("language", None),
+                )
+            )
+        )
+        for problem_data, code in zip(problems_data, code_snippets)
+    ]
+    results = loop.run_until_complete(asyncio.gather(*evals))
+
+    return results
+
+
+def extract_code(completion: str, language: str | None = "python") -> str:
+    if language is None:
+        return ""
     pattern = re.compile(rf"```{language}\n(.*?)```", re.DOTALL)
     matches = pattern.findall(completion)
     extracted_answer = matches[-1] if len(matches) >= 1 else ""
     return extracted_answer
 
 
-def binary_code_reward(completions, **kwargs) -> list[float]:
-    rewards = code_reward(completions, **kwargs)
+def binary_code_reward(
+    completions,
+    num_parallel: int = 2,
+    provider_type: str = "e2b",
+    enforce_same_language: bool = False,
+    **kwargs,
+) -> list[float]:
+    rewards = code_reward(
+        completions,
+        num_parallel=num_parallel,
+        provider_type=provider_type,
+        enforce_same_language=enforce_same_language,
+        **kwargs,
+    )
     BINARY_THRESHOLD = 0.99
-    return [1.0 if reward > BINARY_THRESHOLD else 0.0 for reward in rewards]
+
+    output = []
+    for reward in rewards:
+        if reward is None:
+            output.append(None)
+        else:
+            output.append(1.0 if reward > BINARY_THRESHOLD else 0.0)
+
+    return output
 
 
-def code_reward(completions, **kwargs) -> list[float]:
-    """Reward function that evaluates code snippets using the E2B code interpreter.
+def code_reward(
+    completions,
+    num_parallel: int = 2,
+    provider_type: str = "e2b",
+    enforce_same_language: bool = False,
+    **kwargs,
+) -> list[float]:
+    """Reward function that evaluates code snippets using a code execution provider.
 
     Assumes the dataset contains a `verification_info` column with test cases.
-    """
-    if not is_e2b_available():
-        raise ImportError(
-            "E2B is not available and required for this reward function. Please install E2B with "
-            "`pip install e2b-code-interpreter` and add an API key to a `.env` file."
-        )
 
-    # TODO: add support for other languages in E2B: https://e2b.dev/docs/code-interpreting/supported-languages
-    """Returns a reward function that evaluates code snippets in a sandbox."""
+    Args:
+        completions: List of model completions to evaluate
+        num_parallel: Number of parallel code executions (default: 2)
+        provider_type: Which code execution provider to use (default: "e2b")
+        enforce_same_language: If True, verify all problems use the same language (default: False)
+        **kwargs: Additional arguments passed to the verification
+    """
     evaluation_script_template = """
     import subprocess
     import json
@@ -426,25 +565,31 @@ def code_reward(completions, **kwargs) -> list[float]:
 
     evaluate_code(code_snippet, test_cases)
     """
+
     code_snippets = [extract_code(completion[-1]["content"]) for completion in completions]
     verification_info = kwargs["verification_info"]
+
+    template = evaluation_script_template
+
     scripts = [
-        evaluation_script_template.format(code=json.dumps(code), test_cases=json.dumps(json.dumps(info["test_cases"])))
+        template.format(code=json.dumps(code), test_cases=json.dumps(json.dumps(info["test_cases"])))
         for code, info in zip(code_snippets, verification_info)
     ]
 
     language = verification_info[0]["language"]
 
-    if not all(v["language"] == language for v in verification_info):
-        raise ValueError("All verification_info must have the same language", verification_info)
-    try:
-        rewards = run_async_from_sync(scripts, language)
+    if enforce_same_language:
+        all_same_language = all(v["language"] == language for v in verification_info)
+        if not all_same_language:
+            raise ValueError("All verification_info must have the same language", verification_info)
 
-    except Exception as e:
-        print(f"Error from E2B executor: {e}")
-        rewards = [0.0] * len(completions)
+    execution_provider = get_provider(
+        provider_type=provider_type,
+        num_parallel=num_parallel,
+        **kwargs,
+    )
 
-    return rewards
+    return execution_provider.execute_scripts(scripts, ["python"] * len(scripts))
 
 
 def get_code_format_reward(language: str = "python"):
@@ -453,55 +598,49 @@ def get_code_format_reward(language: str = "python"):
     Args:
         language: Programming language supported by E2B https://e2b.dev/docs/code-interpreting/supported-languages
     """
-    pattern = rf"^<think>\n.*?\n</think>\n<answer>\n.*?```{language}.*?```.*?\n</answer>$"
 
     def code_format_reward(completions, **kwargs):
+        # if there is a language field, use it instead of the default language. This way we can have mixed language training.
+        languages = kwargs["language"] if "language" in kwargs else [language] * len(completions)
+
         completion_contents = [completion[0]["content"] for completion in completions]
-        matches = [re.match(pattern, content, re.DOTALL | re.MULTILINE) for content in completion_contents]
+        matches = [
+            re.match(
+                rf"^<think>\n.*?\n</think>\n<answer>\n.*?```{sample_language}.*?```.*?\n</answer>$",
+                content,
+                re.DOTALL | re.MULTILINE,
+            )
+            for content, sample_language in zip(completion_contents, languages)
+        ]
         return [1.0 if match else 0.0 for match in matches]
 
     return code_format_reward
 
 
-def run_async_from_sync(scripts: list[str], language: str) -> list[float]:
-    """Function wrapping the `run_async` function."""
-    # Create a new event loop and set it
-    try:
-        # Run the async function and get the result
-        rewards = asyncio.run(run_async(scripts, language))
-    except Exception as e:
-        print(f"Error from E2B executor async: {e}")
-        raise e
+def get_soft_overlong_punishment(max_completion_len, soft_punish_cache):
+    """
+    Reward function that penalizes overlong completions. It is used to penalize overlong completions,
+    but not to reward shorter completions. Reference: Eq. (13) from the DAPO paper (https://huggingface.co/papers/2503.14476)
 
-    return rewards
+    Args:
+        max_completion_len: Maximum length of the completion
+        soft_punish_cache: Minimum length of the completion. If set to 0, no minimum length is applied.
+    """
 
+    def soft_overlong_punishment_reward(completion_ids: list[list[int]], **kwargs) -> list[float]:
+        """Reward function that penalizes overlong completions."""
+        rewards = []
+        for ids in completion_ids:
+            completion_length = len(ids)
+            if completion_length <= max_completion_len - soft_punish_cache:
+                rewards.append(0.0)
+            elif max_completion_len - soft_punish_cache < completion_length <= max_completion_len:
+                rewards.append((max_completion_len - soft_punish_cache - completion_length) / soft_punish_cache)
+            else:
+                rewards.append(-1.0)
+        return rewards
 
-async def run_async(scripts: list[str], language: str) -> list[float]:
-    # Create the sandbox by hand, currently there's no context manager for this version
-    sbx = await AsyncSandbox.create(timeout=30, request_timeout=3)
-
-    # Create a list of tasks for running scripts concurrently
-    tasks = [run_script(sbx, script, language) for script in scripts]
-
-    # Wait for all tasks to complete and gather their results as they finish
-    results = await asyncio.gather(*tasks)
-    rewards = list(results)  # collect results
-
-    # Kill the sandbox after all the tasks are complete
-    await sbx.kill()
-
-    return rewards
-
-
-async def run_script(sbx: AsyncSandbox, script: str, language: str) -> float:
-    execution = await sbx.run_code(script, language=language)
-    try:
-        return float(execution.text)
-    except (TypeError, ValueError):
-        return 0.0
-    except Exception as e:
-        print(f"Error from E2B executor run_script: {e}")
-        return 0.0
+    return soft_overlong_punishment_reward
 
 
 def get_reward_funcs(script_args) -> list[Callable]:
@@ -521,13 +660,46 @@ def get_reward_funcs(script_args) -> list[Callable]:
             max_penalty=script_args.repetition_max_penalty,
         ),
         "length": len_reward,
-        "code": code_reward,
-        "binary_code": binary_code_reward,
+        "code": update_wrapper(
+            partial(
+                code_reward,
+                num_parallel=script_args.parallel_code_exec_per_proc,
+                provider_type=script_args.code_provider,
+                enforce_same_language=getattr(script_args, "enforce_same_language", False),
+            ),
+            code_reward,
+        ),
+        "binary_code": update_wrapper(
+            partial(
+                binary_code_reward,
+                num_parallel=script_args.parallel_code_exec_per_proc,
+                provider_type=script_args.code_provider,
+                enforce_same_language=getattr(script_args, "enforce_same_language", False),
+            ),
+            binary_code_reward,
+        ),
         "ioi_code": update_wrapper(
-            partial(ioi_code_reward, test_batch_size=script_args.code_eval_test_batch_size), ioi_code_reward
+            partial(
+                ioi_code_reward,
+                test_batch_size=script_args.code_eval_test_batch_size,
+                provider_type=getattr(script_args, "ioi_provider", "piston"),
+            ),
+            ioi_code_reward,
+        ),
+        "cf_code": update_wrapper(
+            partial(
+                cf_code_reward,
+                test_batch_size=script_args.code_eval_test_batch_size,
+                scoring_mode=script_args.code_eval_scoring_mode,
+            ),
+            cf_code_reward,
         ),
         "code_format": get_code_format_reward(language=script_args.code_language),
         "tag_count": tag_count_reward,
+        "soft_overlong_punishment": get_soft_overlong_punishment(
+            max_completion_len=script_args.max_completion_len,
+            soft_punish_cache=script_args.soft_punish_cache,
+        ),
     }
     reward_funcs = [REWARD_FUNCS_REGISTRY[func] for func in script_args.reward_funcs]
 

src/open_r1/sft.py

@@ -19,20 +19,18 @@ Usage:
 
 # One 1 node of 8 x H100s
 accelerate launch --config_file=recipes/accelerate_configs/zero3.yaml src/open_r1/sft.py \
-    --model_name_or_path Qwen/Qwen2.5-1.5B-Instruct \
-    --dataset_name HuggingFaceH4/Bespoke-Stratos-17k \
-    --learning_rate 2.0e-5 \
-    --num_train_epochs 1 \
-    --packing \
-    --max_seq_length 4096 \
+    --model_name_or_path open-r1/Qwen2.5-Math-7B-RoPE-300k \
+    --dataset_name open-r1/Mixture-of-Thoughts \
+    --dataset_config all \
+    --eos_token '<|im_end|>' \
+    --learning_rate 4.0e-5 \
+    --num_train_epochs 5 \
+    --max_seq_length 32768 \
     --per_device_train_batch_size 2 \
-    --gradient_accumulation_steps 8 \
     --gradient_checkpointing \
     --bf16 \
-    --logging_steps 5 \
-    --eval_strategy steps \
-    --eval_steps 100 \
-    --output_dir data/Qwen2.5-1.5B-Open-R1-Distill
+    --use_liger_kernel \
+    --output_dir data/OpenR1-Distill-7B
 """
 
 import logging
@@ -40,32 +38,21 @@ import os
 import sys
 
 import datasets
-import torch
 import transformers
-from datasets import load_dataset
 from transformers import set_seed
 from transformers.trainer_utils import get_last_checkpoint
 
-from open_r1.configs import SFTConfig
-from open_r1.utils import get_tokenizer
+from open_r1.configs import ScriptArguments, SFTConfig
+from open_r1.utils import get_dataset, get_model, get_tokenizer
 from open_r1.utils.callbacks import get_callbacks
 from open_r1.utils.wandb_logging import init_wandb_training
-from trl import (
-    ModelConfig,
-    ScriptArguments,
-    SFTTrainer,
-    TrlParser,
-    get_kbit_device_map,
-    get_peft_config,
-    get_quantization_config,
-)
+from trl import ModelConfig, SFTTrainer, TrlParser, get_peft_config, setup_chat_format
 
 
 logger = logging.getLogger(__name__)
 
 
 def main(script_args, training_args, model_args):
-    # Set seed for reproducibility
     set_seed(training_args.seed)
 
     ###############
@@ -97,44 +84,25 @@ def main(script_args, training_args, model_args):
     if "wandb" in training_args.report_to:
         init_wandb_training(training_args)
 
-    ################
-    # Load datasets
-    ################
-    dataset = load_dataset(script_args.dataset_name, name=script_args.dataset_config)
-
-    ################
-    # Load tokenizer
-    ################
+    ######################################
+    # Load dataset, tokenizer, and model #
+    ######################################
+    dataset = get_dataset(script_args)
     tokenizer = get_tokenizer(model_args, training_args)
-    tokenizer.pad_token = tokenizer.eos_token
+    model = get_model(model_args, training_args)
 
-    ###################
-    # Model init kwargs
-    ###################
-    logger.info("*** Initializing model kwargs ***")
-    torch_dtype = (
-        model_args.torch_dtype if model_args.torch_dtype in ["auto", None] else getattr(torch, model_args.torch_dtype)
-    )
-    quantization_config = get_quantization_config(model_args)
-    model_kwargs = dict(
-        revision=model_args.model_revision,
-        trust_remote_code=model_args.trust_remote_code,
-        attn_implementation=model_args.attn_implementation,
-        torch_dtype=torch_dtype,
-        use_cache=False if training_args.gradient_checkpointing else True,
-        device_map=get_kbit_device_map() if quantization_config is not None else None,
-        quantization_config=quantization_config,
-    )
-    training_args.model_init_kwargs = model_kwargs
+    if tokenizer.chat_template is None:
+        logger.info("No chat template provided, defaulting to ChatML.")
+        model, tokenizer = setup_chat_format(model, tokenizer, format="chatml")
 
     ############################
     # Initialize the SFT Trainer
     ############################
     trainer = SFTTrainer(
-        model=model_args.model_name_or_path,
+        model=model,
         args=training_args,
         train_dataset=dataset[script_args.dataset_train_split],
-        eval_dataset=dataset[script_args.dataset_test_split] if training_args.eval_strategy != "no" else None,
+        eval_dataset=(dataset[script_args.dataset_test_split] if training_args.eval_strategy != "no" else None),
         processing_class=tokenizer,
         peft_config=get_peft_config(model_args),
         callbacks=get_callbacks(training_args, model_args),
@@ -160,6 +128,9 @@ def main(script_args, training_args, model_args):
     # Save model and create model card
     ##################################
     logger.info("*** Save model ***")
+    # Align the model's generation config with the tokenizer's eos token
+    # to avoid unbounded generation in the transformers `pipeline()` function
+    trainer.model.generation_config.eos_token_id = tokenizer.eos_token_id
     trainer.save_model(training_args.output_dir)
     logger.info(f"Model saved to {training_args.output_dir}")
 

src/open_r1/utils/__init__.py

@@ -1,5 +1,6 @@
-from .import_utils import is_e2b_available
-from .model_utils import get_tokenizer
+from .data import get_dataset
+from .import_utils import is_e2b_available, is_morph_available
+from .model_utils import get_model, get_tokenizer
 
 
-__all__ = ["get_tokenizer", "is_e2b_available"]
+__all__ = ["get_tokenizer", "is_e2b_available", "is_morph_available", "get_model", "get_dataset"]

src/open_r1/utils/callbacks.py

@@ -44,7 +44,13 @@ class PushToHubRevisionCallback(TrainerCallback):
     def __init__(self, model_config) -> None:
         self.model_config = model_config
 
-    def on_save(self, args: TrainingArguments, state: TrainerState, control: TrainerControl, **kwargs):
+    def on_save(
+        self,
+        args: TrainingArguments,
+        state: TrainerState,
+        control: TrainerControl,
+        **kwargs,
+    ):
         if state.is_world_process_zero:
             global_step = state.global_step
 

src/open_r1/utils/code_providers.py

@@ -0,0 +1,366 @@
+# coding=utf-8
+# Copyright 2025 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Code execution providers for executing and evaluating code snippets."""
+
+import abc
+import asyncio
+from typing import List, Optional
+
+from ..utils import is_e2b_available, is_morph_available
+
+
+if is_e2b_available():
+    from e2b_code_interpreter import AsyncSandbox
+    from e2b_code_interpreter.models import Execution
+
+    from .routed_sandbox import RoutedSandbox
+else:
+    AsyncSandbox = None
+    Execution = None
+    RoutedSandbox = None
+
+if is_morph_available():
+    from morphcloud.api import MorphCloudClient
+    from morphcloud.sandbox import Sandbox
+
+    from .routed_morph import RoutedMorphSandbox
+else:
+    MorphCloudClient = None
+    Sandbox = None
+    RoutedMorphSandbox = None
+
+
+class CodeExecutionProvider(abc.ABC):
+    """Abstract base class for code execution providers."""
+
+    @abc.abstractmethod
+    def execute_scripts(self, scripts: List[str], languages: List[str]) -> List[float]:
+        """Execute multiple scripts and return their reward values.
+
+        Args:
+            scripts: List of code scripts to execute
+            language: The programming language of the scripts
+
+        Returns:
+            List of float rewards (one per script)
+        """
+        pass
+
+
+class E2BProvider(CodeExecutionProvider):
+    """Provider that executes code using E2B sandboxes."""
+
+    def __init__(self, num_parallel: int = 2, e2b_router_url: Optional[str] = None):
+        """Initialize the E2B provider.
+
+        Args:
+            num_parallel: Number of parallel sandboxes to use
+            e2b_router_url: URL for the E2B router (if using router mode)
+        """
+        if not is_e2b_available():
+            raise ImportError(
+                "E2B is not available and required for this provider. Please install E2B with "
+                "`pip install e2b-code-interpreter` and add an API key to a `.env` file."
+            )
+
+        self.num_parallel = num_parallel
+        self.e2b_router_url = e2b_router_url
+
+    def execute_scripts(self, scripts: List[str], languages: List[str]) -> List[float]:
+        """Execute scripts using E2B sandboxes.
+
+        If e2b_router_url is provided, uses the RoutedSandbox for batch processing.
+        Otherwise, uses direct AsyncSandbox with parallelization.
+        """
+        if self.e2b_router_url is not None:
+            routed_sandbox = RoutedSandbox(router_url=self.e2b_router_url)
+
+            executions = routed_sandbox.run_code(
+                scripts=scripts,
+                languages=languages,
+                timeout=30,
+                request_timeout=28,
+            )
+
+            rewards = []
+            for execution in executions:
+                try:
+                    reward = float(execution.text)
+                    rewards.append(reward)
+                except Exception:
+                    rewards.append(None)
+            return rewards
+
+        try:
+            rewards = self._run_async_from_sync(scripts, languages, self.num_parallel)
+        except Exception as e:
+            print(f"Error from E2B executor: {e}")
+            rewards = [0.0] * len(scripts)
+
+        return rewards
+
+    def _run_async_from_sync(self, scripts: List[str], languages: List[str], num_parallel: int) -> List[float]:
+        """Function wrapping the `_run_async` function."""
+        try:
+            rewards = asyncio.run(self._run_async(scripts, languages, num_parallel))
+        except Exception as e:
+            print(f"Error from E2B executor async: {e}")
+            raise e
+
+        return rewards
+
+    async def _run_async(self, scripts: List[str], languages: List[str], num_parallel: int) -> List[float]:
+        semaphore = asyncio.Semaphore(num_parallel)
+
+        tasks = [self._run_script(script, languages, semaphore) for script in scripts]
+
+        results = await asyncio.gather(*tasks)
+        rewards = list(results)
+
+        return rewards
+
+    async def _run_script(self, script: str, languages: List[str], semaphore: asyncio.Semaphore) -> float:
+        # We set a timeout margin, as the AsyncSandbox timeout does not seem to work
+        # These values are based on running 256 examples with the gold solution
+        # from open-r1/verifiable-coding-problems-python_decontaminated
+        # see scripts/benchmark_e2b.py
+
+        SANDBOX_TIMEOUT = 30
+        MARGIN = 2
+        REQUEST_TIMEOUT = SANDBOX_TIMEOUT - MARGIN
+        ASYNCIO_TIMEOUT = SANDBOX_TIMEOUT + MARGIN
+
+        async with semaphore:
+            try:
+                sandbox = await AsyncSandbox.create(timeout=SANDBOX_TIMEOUT, request_timeout=REQUEST_TIMEOUT)
+                execution = await asyncio.wait_for(
+                    sandbox.run_code(script, languages=languages),
+                    timeout=ASYNCIO_TIMEOUT,
+                )
+                return float(execution.text)
+            except (TypeError, ValueError):
+                return 0.0
+            except asyncio.TimeoutError:
+                print("Operation timed out")
+                return 0.0
+            except Exception as e:
+                print(f"Error in `_run_script` from E2B sandbox ID {sandbox.sandbox_id} : {e}")
+                return 0.0
+            finally:
+                try:
+                    await sandbox.kill()
+                except Exception as e:
+                    print(f"Error from E2B executor kill with sandbox ID {sandbox.sandbox_id} : {e}")
+
+
+class MorphProvider(CodeExecutionProvider):
+    """Provider that executes code using MorphCloud's Sandbox API."""
+
+    def __init__(self, num_parallel: int = 2, morph_router_url: Optional[str] = None):
+        """Initialize the Morph provider.
+
+        Args:
+            num_parallel: Number of parallel executions to use
+            morph_router_url: URL for the MorphCloud router (if using router mode)
+        """
+        if not is_morph_available():
+            raise ImportError(
+                "MorphCloud is not available and required for this provider. Please install MorphCloud with "
+                "`pip install morphcloud` and add an API key to a `.env` file."
+            )
+
+        try:
+            from dotenv import load_dotenv
+
+            load_dotenv()
+        except ImportError:
+            print("Warning: python-dotenv not installed. Environment variables must be set directly.")
+
+        self.num_parallel = num_parallel
+        self.morph_router_url = morph_router_url
+
+        if self.morph_router_url is not None:
+            self.routed_sandbox = RoutedMorphSandbox(router_url=self.morph_router_url)
+            return
+
+        import os
+
+        self.api_key = os.getenv("MORPH_API_KEY")
+        if not self.api_key:
+            raise ValueError("MorphCloud API key not found. Please set the MORPH_API_KEY environment variable.")
+
+        try:
+            self.client = MorphCloudClient(api_key=self.api_key)
+            self.Sandbox = Sandbox
+        except ImportError as e:
+            raise ImportError(f"Required MorphCloud dependencies not installed: {e}")
+
+    def execute_scripts(self, scripts: List[str], languages: List[str]) -> List[float]:
+        """Execute scripts using MorphCloud Sandbox API.
+
+        Args:
+            scripts: List of Python scripts to execute
+            language: Programming language
+
+        Returns:
+            List of float rewards (one per script)
+        """
+
+        if hasattr(self, "routed_sandbox"):
+            try:
+                results = self.routed_sandbox.run_code(
+                    scripts=scripts,
+                    languages=languages,
+                    timeout=90,
+                    request_timeout=96,
+                )
+
+                rewards = []
+                for result in results:
+                    try:
+                        reward = float(result.text)
+                        rewards.append(reward)
+                    except (ValueError, AttributeError):
+                        rewards.append(0.0)
+                return rewards
+            except Exception as e:
+                print(f"Error from MorphCloud router: {e}")
+                return [0.0] * len(scripts)
+
+        import asyncio
+
+        try:
+            rewards = asyncio.run(self._run_async(scripts, languages, self.num_parallel))
+        except Exception as e:
+            print(f"Error from MorphCloud executor: {e}")
+            rewards = [0.0] * len(scripts)
+
+        return rewards
+
+    async def _run_async(self, scripts: List[str], languages: List[str], num_parallel: int) -> List[float]:
+        """Run multiple scripts concurrently with limited parallelism.
+
+        Args:
+            scripts: List of scripts to execute
+            language: Programming language
+            num_parallel: Maximum number of concurrent executions
+
+        Returns:
+            List of rewards
+        """
+
+        semaphore = asyncio.Semaphore(num_parallel)
+
+        tasks = [self._run_script(script, languages, semaphore) for script in scripts]
+
+        results = await asyncio.gather(*tasks)
+
+        return list(results)
+
+    async def _run_script(self, script: str, languages: List[str], semaphore: asyncio.Semaphore) -> float:
+        """Execute a single script in a MorphCloud Sandbox.
+
+        Args:
+            script: The script to execute
+            language: Programming language
+            semaphore: Semaphore to limit concurrency
+
+        Returns:
+            Float reward from script execution
+        """
+        SANDBOX_TIMEOUT = 90
+        MARGIN = 6
+        ASYNCIO_TIMEOUT = SANDBOX_TIMEOUT + MARGIN
+
+        sandbox = None
+        async with semaphore:
+            try:
+                sandbox = await asyncio.to_thread(self.Sandbox.new, client=self.client, ttl_seconds=SANDBOX_TIMEOUT)
+                result = await asyncio.wait_for(
+                    asyncio.to_thread(
+                        sandbox.run_code,
+                        script,
+                        languages=languages,
+                        timeout=SANDBOX_TIMEOUT,
+                    ),
+                    timeout=ASYNCIO_TIMEOUT,
+                )
+
+                reward = 0.0
+                try:
+                    if hasattr(result, "text") and result.text:
+                        lines = result.text.strip().split("\n")
+                        if lines:
+                            try:
+                                reward = float(lines[-1])
+                            except ValueError:
+                                try:
+                                    reward = float(result.text.strip())
+                                except ValueError:
+                                    pass
+                    elif hasattr(result, "stdout") and result.stdout:
+                        lines = result.stdout.strip().split("\n")
+                        if lines:
+                            try:
+                                reward = float(lines[-1])
+                            except ValueError:
+                                pass
+                except (ValueError, AttributeError):
+                    pass
+
+                return reward
+
+            except asyncio.TimeoutError:
+                return 0.0
+            except Exception:
+                return 0.0
+            finally:
+                if sandbox:
+                    try:
+                        await asyncio.to_thread(sandbox.close)
+                        await asyncio.to_thread(sandbox.shutdown)
+                    except Exception:
+                        pass
+
+
+def get_provider(provider_type: str = "e2b", **kwargs) -> CodeExecutionProvider:
+    """Factory function to get the appropriate code execution provider.
+
+    Args:
+        provider_type: Type of provider to use ("e2b", "morph")
+        **kwargs: Additional arguments to pass to the provider
+
+    Returns:
+        An instance of CodeExecutionProvider
+    """
+    num_parallel = kwargs.pop("num_parallel", 2)
+
+    if provider_type == "e2b":
+        # Extract E2B-specific arguments
+        e2b_router_url = kwargs.pop("e2b_router_url", None)
+        return E2BProvider(
+            num_parallel=num_parallel,
+            e2b_router_url=e2b_router_url,
+        )
+    elif provider_type == "morph":
+        # Extract Morph-specific arguments
+        morph_router_url = kwargs.pop("morph_router_url", None)
+        return MorphProvider(
+            num_parallel=num_parallel,
+            morph_router_url=morph_router_url,
+        )
+    else:
+        raise ValueError(f"Unknown provider type: {provider_type}")

src/open_r1/utils/competitive_programming/__init__.py

@@ -0,0 +1,19 @@
+from .cf_scoring import score_submission
+from .code_patcher import patch_code
+from .ioi_scoring import SubtaskResult, score_subtask, score_subtasks
+from .ioi_utils import add_includes
+from .morph_client import get_morph_client_from_env
+from .piston_client import get_piston_client_from_env, get_slurm_piston_endpoints
+
+
+__all__ = [
+    "get_piston_client_from_env",
+    "get_slurm_piston_endpoints",
+    "get_morph_client_from_env",
+    "patch_code",
+    "score_submission",
+    "score_subtask",
+    "score_subtasks",
+    "add_includes",
+    "SubtaskResult",
+]

src/open_r1/utils/competitive_programming/cf_scoring.py

@@ -0,0 +1,146 @@
+import asyncio
+import os
+from io import BytesIO
+from typing import Literal
+
+from async_lru import alru_cache
+
+from .piston_client import PistonClient
+from .utils import batched
+
+
+async def score_single_test_case(
+    client: PistonClient,
+    problem_data: dict,
+    test_input: str,
+    test_output: str,
+    submission: str,
+    submission_language: str = "cpp",
+) -> tuple[str, str]:
+    if submission_language not in ["python", "cpp"]:
+        raise ValueError(f"Invalid submission language: {submission_language}")
+    try:
+        result = await client.send_execute(
+            {
+                "files": [
+                    {"name": f"main.{submission_language}", "content": submission},
+                    *(
+                        [{"name": "checker.py", "content": problem_data["generated_checker"]}]
+                        if problem_data["generated_checker"]
+                        else []
+                    ),
+                    {"name": "input.txt", "content": test_input},
+                    {"name": "correct_output.txt", "content": test_output},
+                    {
+                        "name": "grader_config",
+                        "content": "\n".join(
+                            f"{key}={value}"
+                            for key, value in {
+                                "TIME_LIMIT": problem_data["time_limit"],
+                                "MEMORY_LIMIT": problem_data["memory_limit"],
+                                "INPUT_MODE": problem_data["input_mode"],
+                            }.items()
+                        ),
+                    },
+                ],
+                "run_timeout": (problem_data["time_limit"] + 10) * 1000,
+                # +10 seconds hard limit. time limits are handled by the codeforces script
+            },
+            language="cf_python3" if submission_language == "python" else "c++17",
+        )
+    except Exception as e:
+        print(f"Error scoring submission: {e}")
+        return False
+
+    return result
+
+
+@alru_cache(maxsize=32)  # TODO make this configurable
+async def get_generated_contest_tests(contest_id: str) -> list[dict]:
+    import pandas as pd
+
+    import aiofiles
+    import aiofiles.os
+
+    tests_folder = os.environ.get("CF_TESTS_FOLDER", None)
+    if not tests_folder:
+        raise ValueError(
+            "CF_TESTS_FOLDER environment variable not set! Please download the codeforces generated tests and set CF_TESTS_FOLDER to the folder path. See https://huggingface.co/datasets/open-r1/codeforces for more information."
+        )
+    if not await aiofiles.os.path.exists(tests_folder):
+        raise ValueError(
+            f"CF_TESTS_FOLDER path '{tests_folder}' does not exist! Please download the codeforces generated tests and set CF_TESTS_FOLDER to the folder path. See https://huggingface.co/datasets/open-r1/codeforces for more information."
+        )
+    parquet_path = os.path.join(tests_folder, f"test_cases_{int(contest_id):04d}.parquet")
+    if not await aiofiles.os.path.exists(parquet_path):
+        return {}
+
+    # Read parquet file asynchronously
+    async with aiofiles.open(parquet_path, "rb") as f:
+        content = await f.read()
+        df = pd.read_parquet(BytesIO(content))
+
+    # Group by problem_id and convert to dictionary of lists
+    grouped_tests = df.groupby("problem_id").apply(lambda x: x[["input", "output"]].to_dict("records")).to_dict()
+
+    return grouped_tests
+
+
+async def get_generated_tests(problem_id: str) -> list[dict]:
+    contest_id = problem_id.split("/")[0]
+    return (await get_generated_contest_tests(contest_id)).get(problem_id, [])
+
+
+async def score_submission(
+    client: PistonClient,
+    problem_data: dict,
+    submission: str,
+    test_batch_size: int = 1,
+    scoring_mode: Literal["pass_fail", "partial", "weighted_sum"] = "weighted_sum",
+    no_compile_reward: float = -0.1,
+    no_submission_reward: float = -1.0,
+    submission_language: str = "cpp",
+) -> float:
+    if submission_language not in ["python", "cpp"]:
+        raise ValueError(f"Invalid submission language: {submission_language}")
+    test_cases = problem_data["official_tests"] + (await get_generated_tests(problem_data["id"]))
+    # invalid/not a coding problem
+    if test_cases is None or len(test_cases) == 0:
+        return None
+    # no code extracted
+    if not submission:
+        return no_submission_reward
+
+    passed_test_cases = 0
+    # run one batch, check if any of them failed (0 score): if so stop evaluating (assuming non partial score); otherwise continue with the next batch of test cases.
+    for test_batch_to_run in batched(test_cases, test_batch_size) if test_batch_size >= 1 else [test_cases]:
+        results = await asyncio.gather(
+            *[
+                asyncio.create_task(
+                    score_single_test_case(
+                        client, problem_data, test_case["input"], test_case["output"], submission, submission_language
+                    )
+                )
+                for test_case in test_batch_to_run
+            ]
+        )
+        if any(result and result["compile"]["code"] != 0 for result in results):
+            return no_compile_reward
+
+        tests_passed_results = [
+            result and result["run"]["code"] == 0 and result["run"]["stdout"].strip() == "1" for result in results
+        ]
+        if scoring_mode == "pass_fail" and any(not test_passed for test_passed in tests_passed_results):
+            break
+        passed_test_cases += sum(1 for test_passed in tests_passed_results if test_passed)
+
+    pass_fail_score = 1.0 if passed_test_cases == len(test_cases) else 0.0
+
+    if scoring_mode == "pass_fail":
+        return pass_fail_score
+    elif scoring_mode == "partial":
+        return passed_test_cases / len(test_cases)
+    elif scoring_mode == "weighted_sum":
+        return pass_fail_score + 0.1 * (passed_test_cases / len(test_cases))
+    else:
+        raise ValueError(f"Invalid scoring mode: {scoring_mode}")

src/open_r1/utils/competitive_programming/code_patcher.py

@@ -0,0 +1,123 @@
+import re
+
+
+def fix_python3_imports(source_code):
+    """
+    Fix common import and function changes between Python 3 versions
+
+    Args:
+        source_code (str): The Python source code to update
+
+    Returns:
+        str: The updated source code
+    """
+    # Dictionary of patterns to replacements
+    replacements = [
+        # Fix collections.abc imports (changed in Python 3.3+)
+        (
+            r"from collections import (Mapping|Sequence|Set|Container|MutableMapping|MutableSet|MutableSequence)",
+            r"from collections.abc import \1",
+        ),
+        # Fix imp module deprecation (deprecated in 3.4)
+        (r"import imp", r"import importlib"),
+        # Fix asyncio.async() to asyncio.ensure_future() (renamed in 3.4.4)
+        (r"asyncio\.async\(", r"asyncio.ensure_future("),
+        # Fix inspect.getargspec to inspect.getfullargspec (deprecated in 3.5)
+        (r"inspect\.getargspec", r"inspect.getfullargspec"),
+        # Fix array.array 'c' type code to 'b' (removed in 3.9)
+        (r"array\.array\('c'", r"array.array('b'"),
+        # Fix backslash line continuation with multiple newlines (Python-specific issue)
+        (r"\\(\r\n|\r|\n)+", "\\\n"),
+        # some solutions use getlogin() to check if they are debugging or on an actual submission
+        (r"(?:os\s*\.\s*)?getlogin\s*\(\s*\)", "False"),
+        # Fix usage of fractions.gcd (moved to math in 3.5)
+        # 1. Fix direct usage: fractions.gcd -> math.gcd
+        (r"\bfractions\.gcd\b", r"math.gcd"),
+        # 2. Fix 'from fractions import gcd, X' -> 'from fractions import X' (start/middle)
+        (r"(from\s+fractions\s+import\s+(?:\([^)]*)?)\bgcd\s*,\s*", r"\1"),
+        # 3. Fix 'from fractions import X, gcd' -> 'from fractions import X' (end)
+        (r"(from\s+fractions\s+import\s+.*?\S)\s*,\s*\bgcd(\s*\)?\s*(?:#.*)?)", r"\1\2"),
+        # 4. Fix standalone 'from fractions import gcd' -> 'from math import gcd'
+        (r"from\s+fractions\s+import\s+\(?\s*gcd\s*\)?", r""),
+        # --- End: Replacement for the faulty line ---
+    ]
+
+    lines = source_code.splitlines()
+    last_import = max(
+        [
+            i
+            for i, line in enumerate(lines)
+            if line.strip().startswith("import") or (line.strip().startswith("from") and "import" in line)
+        ],
+        default=0,
+    )
+    import_section = "\n".join(lines[: last_import + 1])
+    main_source = "\n".join(lines[last_import:])
+
+    if "fractions.gcd" in source_code and "import math" not in source_code:
+        import_section += "\nimport math"
+    elif "gcd" in source_code and "from math import gcd" not in source_code:
+        import_section += "\nfrom math import gcd"
+
+    if "set_int_max_str_digits" not in source_code:
+        import_section += "\nimport sys\nsys.set_int_max_str_digits(0)"
+
+    source_code = import_section + "\n" + main_source
+
+    # Apply each replacement
+    for pattern, replacement in replacements:
+        source_code = re.sub(pattern, replacement, source_code)
+
+    source_code = source_code.rstrip("\\")
+
+    return source_code
+
+
+def fix_cpp_includes(source_code):
+    # has most of the useful functions
+    code_header = "#include <bits/stdc++.h>\n"
+    # use namespace std since models forget std:: often
+    if "using namespace std;" not in source_code and "std::" not in source_code:
+        code_header += "\nusing namespace std;\n\n"
+    return code_header + source_code
+
+
+def is_patchable(lang):
+    return lang in ("python", "python3", "Python 3", "PyPy 3", "PyPy 3-64", "cpp") or "C++" in lang
+
+
+def patch_code(text, lang):
+    if not text:
+        return text
+    if lang in ("python", "python3", "Python 3", "PyPy 3", "PyPy 3-64"):
+        return fix_python3_imports(text)
+    elif "cpp" in lang or "C++" in lang:
+        return fix_cpp_includes(text)
+    return text
+
+
+tests = [
+    """read = lambda: map(int, input().split())
+n, m, z = read()
+from fractions import gcd
+ans = z // (n * m // gcd(n, m))
+print(ans)""",
+    """from fractions import Fraction,gcd
+
+a,b,c,d = [int(x) for x in input().split()]
+
+if a*d > b*c:
+    num = a*d-b*c
+    denom = a*d
+else:
+    num = b*c-a*d
+    denom = b*c
+div = gcd(num,denom)
+print('%d/%d'%(num//div,denom//div))""",
+]
+
+if __name__ == "__main__":
+    for test in tests:
+        print("ORIGINAL:", test, sep="\n\n")
+        print("PATCHED:", patch_code(test, "Python 3"), sep="\n\n")
+        print("=" * 50)

src/open_r1/utils/competitive_programming/ioi_scoring.py

@@ -2,8 +2,9 @@ import asyncio
 from dataclasses import asdict, dataclass, field
 from typing import Union
 
-from .piston_client import PistonClient
-from .utils import batched, load_ioi_tests
+from .ioi_utils import load_ioi_tests
+from .piston_client import PistonClient, PistonError
+from .utils import batched
 
 
 @dataclass
@@ -295,4 +296,40 @@ async def run_submission(
         ),  # +3 seconds hard limit. time limits are handled by the ioi script
         "run_memory_limit": problem["memory_limit"],
     }
-    return await client.execute(data)
+    return await execute_ioi(client, data)
+
+
+async def execute_ioi(client, data) -> tuple[str, str]:
+    """
+    Requests to the IOI package return the score as a float in the stdout, as well as optional feedback/errors in stderr.
+    Returns a tuple of (score, feedback).
+    """
+    response = await client.send_execute(data)
+
+    if "message" in response:
+        raise PistonError(response["message"])
+
+    if "compile" in response and response["compile"]["code"] != 0:
+        return "0", "Compilation error exit code " + str(response["compile"]["code"]) + "\n" + response["compile"][
+            "stderr"
+        ]
+
+    if "run" not in response:
+        raise PistonError(response)
+
+    if response["run"]["code"] == 1 and "MemoryError" in response["run"]["stderr"]:
+        return "0", "Memory limit exceeded"
+
+    # successful result
+    if response["run"]["stdout"]:
+        return response["run"]["stdout"], response["run"]["stderr"]
+
+    if response["run"]["signal"] == "SIGKILL":
+        return "0", "Time limit exceeded"
+
+    # other issues
+    if response["run"]["code"] != 0:
+        raise PistonError(
+            f"language={response['language']}, version={response['version']}, exit code={response['run']['code']}, stderr={response['run']['stderr']}, signal={response['run']['signal']}"
+        )
+    return "0", "Unknown error"

src/open_r1/utils/competitive_programming/ioi_utils.py

@@ -1,6 +1,5 @@
 from collections import defaultdict
 from functools import lru_cache
-from itertools import islice
 
 from datasets import load_dataset
 
@@ -40,13 +39,3 @@ def load_ioi_tests(year: int, problem_id: str) -> dict[str, tuple[str, str]]:
     Load IOI tests for a given year and problem id.
     """
     return load_ioi_tests_for_year(year)[problem_id]
-
-
-def batched(iterable, n):
-    "Batch data into lists of length n. The last batch may be shorter."
-    # batched('ABCDEFG', 3) --> ABC DEF G
-    if n < 1:
-        return iterable
-    it = iter(iterable)
-    while batch := list(islice(it, n)):
-        yield batch

src/open_r1/utils/competitive_programming/morph_client.py

@@ -0,0 +1,742 @@
+import asyncio
+import json
+import logging
+import os
+import tempfile
+from typing import Any, Dict, Optional, Tuple
+
+from dotenv import load_dotenv
+from open_r1.utils.import_utils import is_morph_available
+
+
+# Replace direct imports with conditional imports
+if is_morph_available():
+    from morphcloud.api import Instance, InstanceExecResponse, MorphCloudClient
+else:
+    Instance = None
+    InstanceExecResponse = None
+    MorphCloudClient = None
+
+
+# Silence verbose logs from dependencies
+logging.getLogger("paramiko").setLevel(logging.ERROR)
+logging.getLogger("httpx").setLevel(logging.ERROR)
+
+
+class MorphCloudError(Exception):
+    pass
+
+
+class MorphCloudExecutionClient:
+    def __init__(
+        self,
+        api_key: Optional[str] = None,
+        base_url: Optional[str] = None,
+        spans_log_path: Optional[str] = None,
+    ):
+        """
+        Initialize the MorphCloud execution client.
+
+        Args:
+            api_key: Optional API key for MorphCloud. If not provided, will use MORPH_API_KEY env var.
+            base_url: Optional base URL for MorphCloud API. If not provided, will use default.
+            spans_log_path: Path to log API call spans to. Defaults to 'logs/morph_api_spans.jsonl'.
+        """
+
+        self.client = MorphCloudClient(api_key=api_key, base_url=base_url)
+        self._snapshot_lock = asyncio.Lock()
+
+    async def _prepare_instance(self, snapshot_id=None) -> Instance:
+        """
+        Prepare and start a MorphCloud instance.
+
+        Args:
+          snapshot_id: Optional snapshot ID to use. If None, will get or create base snapshot.
+
+        Returns:
+          Instance: The ready-to-use MorphCloud instance
+
+        Raises:
+          TimeoutError: If instance fails to start or become ready
+        """
+
+        if not snapshot_id:
+            snapshot = await self._get_or_create_base_snapshot()
+            snapshot_id = snapshot.id
+
+        try:
+            instance = await self.client.instances.astart(
+                snapshot_id, ttl_seconds=600
+            )  # Auto-terminate after 10 minutes
+            await instance.await_until_ready(timeout=300)
+            return instance
+        except asyncio.TimeoutError as e:
+            print(f"Timeout while preparing instance: {str(e)}")
+            if instance:
+                try:
+                    await instance.astop()
+                except Exception:
+                    pass
+            raise
+
+    async def _prepare_files(self, data: Dict[str, Any], temp_dir: str) -> Tuple[str, Dict[str, Any], Dict[str, str]]:
+        """
+        Process files, determine problem ID, and prepare configuration.
+
+        Args:
+            data: Dictionary containing file information
+            temp_dir: Local temporary directory for file operations
+
+        Returns:
+            tuple: (problem_id, grader_config, local_files)
+
+        Raises:
+            ValueError: If problem ID cannot be determined
+        """
+        # Extract problem ID
+        problem_id = None
+        graders_files = []
+        for file in data["files"]:
+            if file["name"].startswith("graders/") and file["name"].endswith(".cpp"):
+                potential_id = os.path.basename(file["name"]).split(".")[0]
+                if potential_id not in ["grader", "manager", "stub"]:
+                    problem_id = potential_id
+
+            if file["name"].startswith("graders/"):
+                graders_files.append(file)
+
+        if not problem_id:
+            raise ValueError("Could not determine problem ID from files")
+
+        grader_config = {
+            "task_type": "Batch",
+            "code": problem_id,
+            "time_limit": data["run_timeout"] / 1000,
+            "memory_limit": data["run_memory_limit"] * 1024 * 1024,
+        }
+
+        for file in graders_files:
+            if "manager.cpp" in file["name"]:
+                grader_config["task_type"] = "Communication"
+                grader_config["task_type_parameters_Communication_num_processes"] = 1
+                grader_config["task_type_parameters_Communication_user_io"] = "std_io"
+                break
+
+        config_path = os.path.join(temp_dir, "grader_config.json")
+        with open(config_path, "w") as f:
+            json.dump(grader_config, f)
+
+        local_files = {"grader_config.json": config_path}
+
+        for file in data["files"]:
+            local_path = os.path.join(temp_dir, os.path.basename(file["name"]))
+            with open(local_path, "w") as f:
+                f.write(file["content"])
+            local_files[file["name"]] = local_path
+
+        return problem_id, grader_config, local_files
+
+    async def _upload_files(self, instance: Instance, local_files: Dict[str, str]) -> bool:
+        """
+        Upload all necessary files to the instance.
+
+        Args:
+            instance: The MorphCloud instance
+            local_files: Dictionary mapping remote paths to local file paths
+
+        Returns:
+            bool: True if all uploads were successful
+
+        Raises:
+            TimeoutError: If uploads time out
+        """
+        for remote_name, local_path in local_files.items():
+            target_path = f"/workspace/{remote_name}"
+            dir_path = os.path.dirname(target_path)
+
+            if dir_path != "/workspace":
+                await instance.aexec(f"mkdir -p {dir_path}")
+
+            await instance.aupload(local_path, target_path)
+
+        await instance.aupload(local_files["grader_config.json"], "/workspace/graders/grader_config.json")
+
+        return True
+
+    async def _compile_code(self, instance: Instance) -> InstanceExecResponse:
+        """
+        Compile the code on the instance.
+
+        Args:
+            instance: The MorphCloud instance
+
+        Returns:
+            InstanceExecResponse: Result of compilation
+
+        Raises:
+            RuntimeError: If compilation fails
+        """
+        compile_result = await instance.aexec("cd /workspace && ./compile")
+
+        if compile_result.exit_code != 0:
+            raise RuntimeError(f"Compilation error exit code {compile_result.exit_code}\n{compile_result.stderr}")
+
+        return compile_result
+
+    async def _run_tests(self, instance: Instance, data: Dict[str, Any]) -> Tuple[str, str]:
+        """
+        Run tests and evaluate results.
+
+        Args:
+            instance: The MorphCloud instance
+            data: Dictionary containing runtime parameters
+
+        Returns:
+            tuple: (score, feedback)
+
+        Raises:
+            TimeoutError: If test execution times out
+        """
+        hard_timeout = data["run_timeout"] / 1000 + 3
+        run_command = f"cd /workspace && timeout {hard_timeout}s ./run"
+
+        run_result = await instance.aexec(run_command)
+
+        if run_result.exit_code == 124 or run_result.exit_code == 137 or run_result.exit_code == 143:
+            return "0", "Time limit exceeded"
+
+        if run_result.exit_code != 0 and "Memory limit exceeded" in run_result.stderr:
+            return "0", "Memory limit exceeded"
+
+        if run_result.stdout:
+            return run_result.stdout.strip(), run_result.stderr.strip()
+
+        if run_result.exit_code != 0:
+            return (
+                "0",
+                f"Runtime error with exit code {run_result.exit_code}\n{run_result.stderr}",
+            )
+
+        return "0", "Unknown error"
+
+    async def _execute_with_instance(self, instance: Instance, data: Dict[str, Any], temp_dir: str) -> Tuple[str, str]:
+        """Execute code using a prepared instance.
+
+        Args:
+            instance: Ready MorphCloud instance
+            data: Execution data
+            temp_dir: Temporary directory for file operations
+
+        Returns:
+            Tuple of (score, feedback)
+
+        Raises:
+            Exception: Passes through exceptions for retry handling
+        """
+        await instance.await_until_ready(timeout=300)
+
+        problem_id, grader_config, local_files = await self._prepare_files(data, temp_dir)
+
+        await self._upload_files(instance, local_files)
+
+        try:
+            await self._compile_code(instance)
+        except RuntimeError as e:
+            return "0", str(e)
+
+        score, feedback = await self._run_tests(instance, data)
+        return score, feedback
+
+    async def _execute(self, data: Dict[str, Any]) -> Tuple[str, str]:
+        """
+        Internal implementation of execute with no retry logic.
+
+        Args:
+            data: Dictionary containing execution data
+
+        Returns:
+            Tuple of (score, feedback)
+
+        Raises:
+            Exception: If execution fails
+        """
+        instance = None
+
+        # Set timeouts to ensure we don't block indefinitely
+        # INSTANCE_TIMEOUT = 300  # 5 minutes for instance operations
+        TOTAL_EXECUTION_TIMEOUT = 600  # 10 minutes total execution time
+
+        with tempfile.TemporaryDirectory(prefix="morph_exec_") as temp_dir:
+            snapshot = await self._get_or_create_base_snapshot()
+            instance = await self.client.instances.astart(
+                snapshot.id, ttl_seconds=600
+            )  # Auto-terminate after 10 minutes
+
+            async with instance:
+                # Use asyncio.wait_for to add overall timeout to the execution process
+                return await asyncio.wait_for(
+                    self._execute_with_instance(instance, data, temp_dir),
+                    timeout=TOTAL_EXECUTION_TIMEOUT,
+                )
+
+    async def execute(self, data: Dict[str, Any]) -> Tuple[str, str]:
+        """
+        Execute code on MorphCloud based on the provided data with enhanced debugging and recovery.
+
+        Orchestrates the following steps with proper error handling and retries:
+        1. Prepare an instance (with retry)
+        2. Set up workspace (with retry)
+        3. Prepare and upload files (with retry)
+        4. Compile code (with retry)
+        5. Run tests (with retry)
+
+        Args:
+            data: Dictionary containing:
+                - files: List of file objects with name and content fields
+                - run_timeout: Timeout in milliseconds
+                - run_memory_limit: Memory limit in MB
+
+        Returns:
+            Tuple of (score, feedback) where:
+                - score is a string representation of a float between 0.0 and 1.0
+                - feedback is a string with execution details
+        """
+        # TODO: would be faster to pass info about the subtask as well to create a snapshot per subtask
+        # would cache the uploads of all files other than the submission: input.txt, correct_output.txt, grader files
+        # rather than reusing the snapshot that only has the compile/run scripts on it
+        # currently, run_submission -> client.execute(data) does not easily pass subtask info
+
+        # Retry configuration
+        max_retries = 4
+        base_delay = 1.0
+
+        # Try execution with retries and exponential backoff
+        for attempt in range(max_retries + 1):
+            try:
+                return await self._execute(data)
+
+            except asyncio.TimeoutError:
+                if attempt < max_retries:
+                    print(f"Execution timed out, retrying ({attempt + 1}/{max_retries})")
+                else:
+                    return "0", "Execution timed out after multiple retries"
+
+            except Exception as e:
+                # Calculate exponential backoff
+                if attempt < max_retries:
+                    retry_delay = min(base_delay * (2**attempt), 30)  # Exponential backoff, capped at 30 seconds
+
+                    print(
+                        f"Execution failed with {type(e).__name__}: {str(e)}, retrying in {retry_delay:.2f}s ({attempt + 1}/{max_retries})"
+                    )
+                    await asyncio.sleep(retry_delay)
+                else:
+                    print(f"Execution failed after {max_retries} retries: {type(e).__name__}: {str(e)}")
+                    return "0", f"Execution failed after multiple retries: {str(e)}"
+
+    async def _get_or_create_base_snapshot(self):
+        """Get or create a snapshot with the necessary dependencies and scripts for evaluation."""
+
+        async with self._snapshot_lock:
+            base_snapshots = await self.client.snapshots.alist(digest="ioi-evaluation-morph")
+
+            if not base_snapshots:
+                print("Creating base snapshot with build-essential cmake and g++")
+
+                # Create base snapshot with minimal specs
+                base_snapshot = await self.client.snapshots.acreate(
+                    vcpus=2,
+                    memory=4096,
+                    disk_size=10240,
+                    metadata={"purpose": "ioi_evaluation"},
+                )
+
+                # Start a temporary instance from the base snapshot
+                temp_instance = await self.client.instances.astart(
+                    base_snapshot.id, ttl_seconds=900
+                )  # Auto-terminate after 15 minutes
+
+                try:
+                    # Wait for the instance to be ready
+                    await temp_instance.await_until_ready(timeout=300)
+
+                    # Get script contents
+                    compile_script = await self._get_compile_script()
+                    run_script = await self._get_run_script()
+
+                    # Use temporary directory to store scripts
+                    with tempfile.TemporaryDirectory(prefix="morph_setup_") as temp_dir:
+                        # Create paths for script files
+                        compile_path = os.path.join(temp_dir, "compile.sh")
+                        run_path = os.path.join(temp_dir, "run.sh")
+
+                        # Write scripts to temp files
+                        with open(compile_path, "w") as f:
+                            f.write(compile_script)
+
+                        with open(run_path, "w") as f:
+                            f.write(run_script)
+
+                        async with temp_instance:
+                            # Install dependencies
+                            await temp_instance.aexec("apt-get update && apt-get install -y build-essential cmake g++")
+
+                            # Create workspace directory
+                            await temp_instance.aexec(
+                                "mkdir -p /workspace && mkdir -p /workspace/graders && chmod 777 /workspace"
+                            )
+
+                            # Upload scripts to instance
+                            await temp_instance.aupload(compile_path, "/workspace/compile")
+                            await temp_instance.aupload(run_path, "/workspace/run")
+
+                            # Make scripts executable
+                            await temp_instance.aexec("chmod +x /workspace/compile /workspace/run")
+
+                            # Create snapshot from the prepared instance
+                            final_snapshot = await temp_instance.asnapshot(digest="ioi-evaluation-morph")
+
+                except Exception as e:
+                    # Ensure instance is stopped if anything fails
+                    await temp_instance.astop()
+                    raise e
+            else:
+                final_snapshot = base_snapshots[0]
+
+            return final_snapshot
+
+    async def _get_compile_script(self):
+        """Get the compile script content."""
+        return """#!/bin/bash
+
+manager_files=()  # Array to store manager filenames
+current_dir="$(pwd)"
+
+# Checker compilation path
+checker_dir="$current_dir/checker"
+checker_src="$checker_dir/checker.cpp"
+
+if [ -e "$checker_src" ]; then
+    echo "Compiling checker"
+    checker_exe="$checker_dir/checker"
+    g++ -x c++ -std=gnu++17 -O2 -o "$checker_exe" "$checker_src"
+    chmod +x "$checker_exe"
+    if [ $? -ne 0 ]; then
+        echo "Could not compile checker" >&2
+        exit 1
+    fi
+    echo "Compiled checker"
+else
+    echo "No checker found at $checker_src"
+fi
+
+# Graders path
+graders_dir="$current_dir/graders"
+if [ ! -e "$graders_dir" ]; then
+    echo "Grader folder was not found" >&2
+    exit 1
+fi
+
+# Find and compile manager if it exists
+manager_src="$graders_dir/manager.cpp"
+if [ -e "$manager_src" ]; then
+    echo "Compiling manager"
+    manager_exe="$graders_dir/manager"
+    g++ -x c++ -std=gnu++17 -O2 -o "$manager_exe" "$manager_src"
+    chmod +x "$manager_exe"
+    if [ $? -ne 0 ]; then
+        echo "Could not compile manager" >&2
+        exit 1
+    fi
+    manager_files+=("manager")
+fi
+
+# Process other graders
+graders_list=($(ls "$graders_dir" | grep -v 'manager.cpp'))
+for grader_name in "${graders_list[@]}"; do
+    manager_files+=("$grader_name")
+done
+
+# Extract problem name and compile necessary files
+problem_name='?'
+for file in "${manager_files[@]}"; do
+    if [[ "$file" == *.h && "$file" != "testlib.h" ]]; then
+        problem_name="${file%.h}"
+        echo "Problem name: $problem_name"
+        break
+    fi
+done
+
+files_to_compile=("graders/$problem_name.cpp")
+[ -e graders/grader.cpp ] && files_to_compile+=("graders/grader.cpp")
+[ -e graders/stub.cpp ] && files_to_compile+=("graders/stub.cpp")
+
+g++ -DEVAL -std=gnu++17 -O2 -pipe -s -o graders/"$problem_name" "${files_to_compile[@]}"
+if [ $? -ne 0 ]; then
+    echo "Failed to compile $problem_name" >&2
+    exit 1
+fi
+chmod +x graders/"$problem_name"
+echo "Compiled $problem_name from ${files_to_compile[@]} successfully"
+
+echo "Manager files: ${manager_files[@]}"
+"""
+
+    async def _get_run_script(self):
+        """Get the run script content."""
+        return """#!/usr/bin/env bash
+# disable stack limit so you don't get RE with recursion
+ulimit -s unlimited
+# some problems have 10MB+ input/output files in their test cases and you might get RE. uncomment if needed
+# ulimit -f 2097152
+
+# Check if grader_config.json exists
+if [ ! -f "graders/grader_config.json" ]; then
+    echo "Error: graders/grader_config.json not found" >&2
+    echo "Current directory contents:" >&2
+    find . -type f -o -type d | sed -e 's/[^-][^\/]*\//  |/g' -e 's/|\([^ ]\)/|-\1/' >&2
+    exit 1
+fi
+
+# Read task type, code, and time limit from grader_config.json using grep and sed
+TASK_TYPE=$(grep -o '"task_type":[^,}]*' graders/grader_config.json | sed 's/"task_type":\\s*"\\([^"]*\\)"/\\1/')
+TASK_NAME=$(grep -o '"code":[^,}]*' graders/grader_config.json | sed 's/"code":\\s*"\\([^"]*\\)"/\\1/')
+TIME_LIMIT=$(grep -o '"time_limit":[^,}]*' graders/grader_config.json | sed 's/"time_limit":\\s*\\([^,}]*\\)/\\1/')
+MEMORY_LIMIT=$(grep -o '"memory_limit":[^,}]*' graders/grader_config.json | sed 's/"memory_limit":\\s*\\([^,}]*\\)/\\1/')
+TASK_EXECUTABLE="graders/$TASK_NAME"
+
+# Set memory limit in KB (convert from bytes)
+MEMORY_LIMIT_KB=0
+if [ -n "$MEMORY_LIMIT" ]; then
+    MEMORY_LIMIT_KB=$(($MEMORY_LIMIT / 1024))
+    # Set the memory limit for the entire script and all child processes
+    ulimit -v $MEMORY_LIMIT_KB
+fi
+
+# "Securely" handle the correct output file
+CORRECT_OUTPUT=""
+if [ -f "correct_output.txt" ]; then
+    # Read the content and immediately remove the file
+    CORRECT_OUTPUT=$(cat correct_output.txt)
+    rm -f correct_output.txt
+fi
+
+# Create a temporary file for solution output
+SOLUTION_OUTPUT=$(mktemp)
+
+# Global variables for process tracking
+declare -a ALL_PIDS
+declare -a FIFO_DIRS
+
+# Define cleanup function - simplified assuming timeout exists
+function cleanup {
+    # Kill all tracked processes silently
+    exec 2>/dev/null
+    for pid in "${ALL_PIDS[@]:-}"; do
+        kill -9 "$pid" 2>/dev/null || true
+    done
+
+    # Clean up FIFO directories
+    for dir in "${FIFO_DIRS[@]:-}"; do
+        [ -d "$dir" ] && rm -rf "$dir"
+    done
+
+    # Clean up temporary files
+    rm -f "$SOLUTION_OUTPUT" || true
+    exec 2>&2
+}
+
+# Set up signal handling
+trap cleanup EXIT INT TERM
+
+# Function to handle exit codes consistently across task types
+function handle_exit_code {
+    local exit_code=$1
+
+    # Check for known timeout exit codes:
+    # - 124: standard timeout exit code
+    # - 137: SIGKILL (128+9), used for hard timeouts
+    # - 143: SIGTERM (128+15), can also be used for timeouts
+    if [ $exit_code -eq 124 ] || [ $exit_code -eq 137 ] || [ $exit_code -eq 143 ]; then
+        echo "0"
+        echo "Time limit exceeded (${TIME_LIMIT}s)" >&2
+        return 124
+    # All other non-zero exit codes should be treated as runtime errors
+    elif [ $exit_code -ne 0 ]; then
+        echo "0"
+        echo "Runtime error with exit code $exit_code" >&2
+        return $exit_code
+    fi
+
+    # Success case - return 0
+    return 0
+}
+
+# Function to run a command with timeout (simplified assuming timeout exists)
+function run_with_timeout {
+    local soft_limit=$1; shift
+    local command_to_run="$@"
+
+    timeout --preserve-status "$soft_limit" "$@"
+    return $?
+}
+
+case "$TASK_TYPE" in
+    "Batch")
+        # Simple batch execution with timeout
+        run_with_timeout "$TIME_LIMIT" ./$TASK_EXECUTABLE < input.txt > "$SOLUTION_OUTPUT"
+        exit_code=$?
+
+        # Handle non-zero exit codes
+        handle_exit_code $exit_code
+        if [ $? -ne 0 ]; then
+            exit $?
+        fi
+
+        # Check the output if we have a correct output
+        if [ -n "$CORRECT_OUTPUT" ]; then
+            # Restore the correct output file
+            echo "$CORRECT_OUTPUT" > correct_output.txt
+
+            # Check if there's a custom checker
+            if [ -f "checker/checker" ]; then
+                # Let the checker handle everything
+                ./checker/checker input.txt correct_output.txt "$SOLUTION_OUTPUT"
+                exit $?
+            else
+                # Simple diff-based checking
+                if diff -bq <(echo "$CORRECT_OUTPUT") "$SOLUTION_OUTPUT" >/dev/null; then
+                    echo "1"
+                    echo "Output is correct (diff)" >&2
+                else
+                    echo "0"
+                    echo "Output isn't correct (diff)" >&2
+                    exit 0
+                fi
+            fi
+        else
+            # If no correct output was provided, just output the solution's output
+            cat "$SOLUTION_OUTPUT"
+        fi
+        ;;
+
+    "Communication")
+        # Read Communication-specific parameters
+        NUM_PROCESSES=$(grep -o '"task_type_parameters_Communication_num_processes":[^,}]*' graders/grader_config.json | sed 's/.*:\\s*\\([0-9]*\\)/\\1/' || true)
+        if [ -z "$NUM_PROCESSES" ]; then
+            NUM_PROCESSES=1
+        fi
+        USER_IO=$(grep -o '"task_type_parameters_Communication_user_io":[^,}]*' graders/grader_config.json | sed 's/.*:\\s*"\\([^"]*\\)"/\\1/' || echo "std_io")
+
+        # Read custom manager arguments if they exist
+        MANAGER_CUSTOM_ARGS=""
+        if grep -q '"task_type_parameters_Communication_manager_args"' graders/grader_config.json; then
+            MANAGER_CUSTOM_ARGS=$(grep -o '"task_type_parameters_Communication_manager_args":[^,}]*' graders/grader_config.json | sed 's/.*:\\s*"\\([^"]*\\)"/\\1/')
+        fi
+
+        # Create temporary directories for FIFOs
+        for i in $(seq 0 $((NUM_PROCESSES-1))); do
+            FIFO_DIRS[$i]=$(mktemp -d)
+
+            # Create FIFOs for this process
+            mkfifo "${FIFO_DIRS[$i]}/u${i}_to_m"
+            mkfifo "${FIFO_DIRS[$i]}/m_to_u${i}"
+            chmod 755 "${FIFO_DIRS[$i]}"
+            chmod 666 "${FIFO_DIRS[$i]}/u${i}_to_m" "${FIFO_DIRS[$i]}/m_to_u${i}"
+        done
+
+        # Prepare manager arguments
+        MANAGER_ARGS=""
+        for i in $(seq 0 $((NUM_PROCESSES-1))); do
+            MANAGER_ARGS="$MANAGER_ARGS ${FIFO_DIRS[$i]}/u${i}_to_m ${FIFO_DIRS[$i]}/m_to_u${i}"
+        done
+
+        # Add custom manager arguments if specified
+        if [ -n "$MANAGER_CUSTOM_ARGS" ]; then
+            MANAGER_ARGS="$MANAGER_ARGS $MANAGER_CUSTOM_ARGS"
+        fi
+
+        # Start all user processes first
+        for i in $(seq 0 $((NUM_PROCESSES-1))); do
+            if [ "$USER_IO" = "fifo_io" ]; then
+                # Pass FIFOs as arguments
+                ARGS="${FIFO_DIRS[$i]}/m_to_u${i} ${FIFO_DIRS[$i]}/u${i}_to_m"
+                if [ "$NUM_PROCESSES" -ne 1 ]; then
+                    ARGS="$ARGS $i"
+                fi
+                ./$TASK_EXECUTABLE $ARGS &
+                ALL_PIDS+=($!)
+            else
+                # Use stdin/stdout redirection
+                if [ "$NUM_PROCESSES" -ne 1 ]; then
+                    ./$TASK_EXECUTABLE "$i" < "${FIFO_DIRS[$i]}/m_to_u${i}" > "${FIFO_DIRS[$i]}/u${i}_to_m" 2>/dev/null &
+                    ALL_PIDS+=($!)
+                else
+                    ./$TASK_EXECUTABLE < "${FIFO_DIRS[$i]}/m_to_u${i}" > "${FIFO_DIRS[$i]}/u${i}_to_m" 2>/dev/null &
+                    ALL_PIDS+=($!)
+                fi
+            fi
+        done
+
+        # Run the manager with timeout using direct pipe from input.txt
+        run_with_timeout "$TIME_LIMIT" ./graders/manager $MANAGER_ARGS < input.txt > "$SOLUTION_OUTPUT"
+
+        exit_code=$?
+
+        # Handle non-zero exit codes
+        handle_exit_code $exit_code
+        if [ $? -ne 0 ]; then
+            exit $?
+        fi
+
+        # Check the output if we have a correct output AND there's a checker (otherwise we assume the manager handles everything)
+        if [ -n "$CORRECT_OUTPUT" ] && [ -f "checker/checker" ]; then
+            # Restore the correct output file
+            echo "$CORRECT_OUTPUT" > correct_output.txt
+
+            # Let the checker handle it
+            ./checker/checker input.txt correct_output.txt "$SOLUTION_OUTPUT"
+            exit $?
+        else
+            # we assume the manager handles it
+            cat "$SOLUTION_OUTPUT"
+        fi
+        ;;
+
+    *)
+        echo "0"
+        echo "Unsupported task type \"$TASK_TYPE\"" >&2
+        exit 1
+        ;;
+esac
+"""
+
+
+def get_morph_client_from_env(session=None) -> MorphCloudExecutionClient:
+    """
+    Creates a MorphCloudExecutionClient instance using environment variables.
+
+    Environment variables:
+        MORPH_API_KEY: API key for MorphCloud
+
+    Args:
+        session: Optional aiohttp.ClientSession to use for HTTP requests
+
+    Returns:
+        MorphCloudExecutionClient: A configured MorphCloud execution client
+    """
+    if not is_morph_available():
+        raise ImportError(
+            "MorphCloud is not available and required for this function. Please install MorphCloud with "
+            "`pip install morphcloud` and add an API key to a `.env` file."
+        )
+
+    load_dotenv()
+    api_key = os.environ.get("MORPH_API_KEY")
+    if not api_key:
+        raise ValueError("MORPH_API_KEY environment variable is required")
+
+    return MorphCloudExecutionClient(api_key=api_key)
+
+
+# noqa: W293

src/open_r1/utils/competitive_programming/piston_client.py

@@ -14,16 +14,23 @@ class PistonError(Exception):
 
 
 @lru_cache(maxsize=1)
-def get_piston_client_from_env():
+def get_piston_client_from_env(session=None):
     piston_endpoints = os.getenv("PISTON_ENDPOINTS")
     if piston_endpoints is None:
         raise ValueError(
-            "For IOI problems Piston endpoints running our IOI package are required. Please add a list of valid Piston endpoints to a PISTON_ENDPOINTS varialbe in a `.env` file."
+            "For IOI/CF problems Piston endpoints running our IOI package are required. Please add a list of valid Piston endpoints to a PISTON_ENDPOINTS variable in a `.env` file."
         )
-    piston_endpoints = piston_endpoints.split(",") if piston_endpoints != "slurm" else get_slurm_piston_endpoints()
+    piston_endpoints = sorted(
+        piston_endpoints.split(",") if piston_endpoints != "slurm" else get_slurm_piston_endpoints()
+    )
+    gpu_nb = int(os.getenv("LOCAL_RANK", 0))  # per‑GPU index
+    world = int(os.getenv("WORLD_SIZE", 1))  # total GPUs
+    if world > 1:
+        print(f"Using a subset of piston endpoints for GPU#{gpu_nb}")
+        piston_endpoints = piston_endpoints[gpu_nb::world]
     random.shuffle(piston_endpoints)
     max_requests_per_endpoint = os.getenv("PISTON_MAX_REQUESTS_PER_ENDPOINT", "1")
-    return PistonClient(piston_endpoints, max_requests_per_endpoint=int(max_requests_per_endpoint))
+    return PistonClient(piston_endpoints, session, max_requests_per_endpoint=int(max_requests_per_endpoint))
 
 
 class PistonClient:
@@ -57,6 +64,8 @@ class PistonClient:
     ):
         self.max_requests_per_endpoint = max_requests_per_endpoint
         self.base_endpoints = [base_endpoint] if isinstance(base_endpoint, str) else base_endpoint
+        if len(self.base_endpoints) == 0:
+            raise ValueError("No Piston endpoints provided. Please check your PISTON_ENDPOINTS environment variable.")
         self.endpoint_ids = {endpoint: i for i, endpoint in enumerate(self.base_endpoints)}
 
         self._session = session
@@ -73,7 +82,7 @@ class PistonClient:
     def session(self):
         if self._session is None:
             self._session = aiohttp.ClientSession(
-                timeout=aiohttp.ClientTimeout(sock_read=10),
+                timeout=aiohttp.ClientTimeout(sock_read=30),
                 connector=aiohttp.TCPConnector(
                     limit=self.max_requests_per_endpoint * len(self.base_endpoints),
                     ttl_dns_cache=300,
@@ -112,41 +121,6 @@ class PistonClient:
     async def get_supported_runtimes(self):
         return await self._send_to_all("runtimes", method="get")
 
-    async def execute(self, data) -> tuple[str, str]:
-        """
-        Requests to the IOI package return the score as a float in the stdout, as well as optional feedback/errors in stderr.
-        Returns a tuple of (score, feedback).
-        """
-        response = await self._send_execute(data)
-
-        if "message" in response:
-            raise PistonError(response["message"])
-
-        if "compile" in response and response["compile"]["code"] != 0:
-            return "0", "Compilation error exit code " + str(response["compile"]["code"]) + "\n" + response["compile"][
-                "stderr"
-            ]
-
-        if "run" not in response:
-            raise PistonError(response)
-
-        if response["run"]["code"] == 1 and "MemoryError" in response["run"]["stderr"]:
-            return "0", "Memory limit exceeded"
-
-        # successful result
-        if response["run"]["stdout"]:
-            return response["run"]["stdout"], response["run"]["stderr"]
-
-        if response["run"]["signal"] == "SIGKILL":
-            return "0", "Time limit exceeded"
-
-        # other issues
-        if response["run"]["code"] != 0:
-            raise PistonError(
-                f"language={response['language']}, version={response['version']}, exit code={response['run']['code']}, stderr={response['run']['stderr']}, signal={response['run']['signal']}"
-            )
-        return "0", "Unknown error"
-
     async def _check_failed_endpoint(self, endpoint):
         async with self._endpoint_failures_lock:
             if endpoint in self._unhealthy_endpoints:
@@ -157,14 +131,15 @@ class PistonClient:
             except Exception as e:
                 print(f"Error checking endpoint {endpoint}, dropping it ({e})")
                 self._unhealthy_endpoints.add(endpoint)
+                if len(self._unhealthy_endpoints) >= len(self.base_endpoints):
+                    raise PistonError("All endpoints are unhealthy. Please check your Piston workers.")
 
-    async def _send_execute(self, data):
+    async def send_execute(self, data, language="cms_ioi", max_retries=5):
         data = data | {
-            "language": "cms_ioi",
+            "language": language,
             "version": "*",
         }
 
-        max_retries = 5
         base_delay = 1.0
 
         status = None
@@ -182,7 +157,7 @@ class PistonClient:
                     res_json = await response.json(content_type=None)
 
                     if status != 200:
-                        raise PistonError(f"Server error. status={status}")
+                        raise PistonError(f"Server error. status={status}. {res_json}")
                     if res_json is None:
                         raise PistonError(f"Empty response. status={status}")
                     # piston overloaded
@@ -197,7 +172,7 @@ class PistonClient:
                     delay = min(base_delay * (2**attempt), 10)  # Exponential backoff, capped at 10 seconds
                     jitter = delay * 0.2 * (2 * asyncio.get_event_loop().time() % 1 - 0.5)  # Add ±10% jitter
                     retry_delay = delay + jitter
-                    print(f"Retrying in {retry_delay} seconds [{self.endpoint_ids[endpoint]}] {endpoint}")
+                    print(f"Retrying in {retry_delay:.2f} seconds [{self.endpoint_ids[endpoint]}] {endpoint} - {e}")
 
                     # special case: worker died
                     if isinstance(e, aiohttp.ClientConnectionError) and "Connect call failed" in str(e):
@@ -209,8 +184,7 @@ class PistonClient:
 
                     await asyncio.sleep(retry_delay)
                 else:
-                    print(f"Giving up on retries. {e}")
-                    raise e
+                    await self._check_failed_endpoint(endpoint)
             except Exception as e:
                 print(f"Propagating exception {type(e)}: {e}")
                 raise e

src/open_r1/utils/competitive_programming/utils.py

@@ -0,0 +1,11 @@
+from itertools import islice
+
+
+def batched(iterable, n):
+    "Batch data into lists of length n. The last batch may be shorter."
+    # batched('ABCDEFG', 3) --> ABC DEF G
+    if n < 1:
+        return iterable
+    it = iter(iterable)
+    while batch := list(islice(it, n)):
+        yield batch

src/open_r1/utils/data.py

@@ -0,0 +1,65 @@
+import logging
+
+import datasets
+from datasets import DatasetDict, concatenate_datasets
+
+from ..configs import ScriptArguments
+
+
+logger = logging.getLogger(__name__)
+
+
+def get_dataset(args: ScriptArguments) -> DatasetDict:
+    """Load a dataset or a mixture of datasets based on the configuration.
+
+    Args:
+        args (ScriptArguments): Script arguments containing dataset configuration.
+
+    Returns:
+        DatasetDict: The loaded datasets.
+    """
+    if args.dataset_name and not args.dataset_mixture:
+        logger.info(f"Loading dataset: {args.dataset_name}")
+        return datasets.load_dataset(args.dataset_name, args.dataset_config)
+    elif args.dataset_mixture:
+        logger.info(f"Creating dataset mixture with {len(args.dataset_mixture.datasets)} datasets")
+        seed = args.dataset_mixture.seed
+        datasets_list = []
+
+        for dataset_config in args.dataset_mixture.datasets:
+            logger.info(f"Loading dataset for mixture: {dataset_config.id} (config: {dataset_config.config})")
+            ds = datasets.load_dataset(
+                dataset_config.id,
+                dataset_config.config,
+                split=dataset_config.split,
+            )
+            if dataset_config.columns is not None:
+                ds = ds.select_columns(dataset_config.columns)
+            if dataset_config.weight is not None:
+                ds = ds.shuffle(seed=seed).select(range(int(len(ds) * dataset_config.weight)))
+                logger.info(
+                    f"Subsampled dataset '{dataset_config.id}' (config: {dataset_config.config}) with weight={dataset_config.weight} to {len(ds)} examples"
+                )
+
+            datasets_list.append(ds)
+
+        if datasets_list:
+            combined_dataset = concatenate_datasets(datasets_list)
+            combined_dataset = combined_dataset.shuffle(seed=seed)
+            logger.info(f"Created dataset mixture with {len(combined_dataset)} examples")
+
+            if args.dataset_mixture.test_split_size is not None:
+                combined_dataset = combined_dataset.train_test_split(
+                    test_size=args.dataset_mixture.test_split_size, seed=seed
+                )
+                logger.info(
+                    f"Split dataset into train and test sets with test size: {args.dataset_mixture.test_split_size}"
+                )
+                return combined_dataset
+            else:
+                return DatasetDict({"train": combined_dataset})
+        else:
+            raise ValueError("No datasets were loaded from the mixture configuration")
+
+    else:
+        raise ValueError("Either `dataset_name` or `dataset_mixture` must be provided")

src/open_r1/utils/evaluation.py

@@ -7,6 +7,7 @@ from .hub import get_gpu_count_for_vllm, get_param_count_from_repo_id
 if TYPE_CHECKING:
     from trl import GRPOConfig, SFTConfig, ModelConfig
 
+import base64
 import os
 
 
@@ -24,7 +25,11 @@ VLLM_SLURM_PREFIX = [
 
 
 def register_lighteval_task(
-    configs: Dict[str, str], eval_suite: str, task_name: str, task_list: str, num_fewshot: int = 0
+    configs: Dict[str, str],
+    eval_suite: str,
+    task_name: str,
+    task_list: str,
+    num_fewshot: int = 0,
 ):
     """Registers a LightEval task configuration.
 
@@ -46,10 +51,10 @@ def register_lighteval_task(
 
 LIGHTEVAL_TASKS = {}
 
-register_lighteval_task(LIGHTEVAL_TASKS, "custom", "math_500", "math_500", 0)
-register_lighteval_task(LIGHTEVAL_TASKS, "custom", "aime24", "aime24", 0)
-register_lighteval_task(LIGHTEVAL_TASKS, "custom", "aime25", "aime25", 0)
-register_lighteval_task(LIGHTEVAL_TASKS, "custom", "gpqa", "gpqa:diamond", 0)
+register_lighteval_task(LIGHTEVAL_TASKS, "lighteval", "math_500", "math_500", 0)
+register_lighteval_task(LIGHTEVAL_TASKS, "lighteval", "aime24", "aime24", 0)
+register_lighteval_task(LIGHTEVAL_TASKS, "lighteval", "aime25", "aime25", 0)
+register_lighteval_task(LIGHTEVAL_TASKS, "lighteval", "gpqa", "gpqa:diamond", 0)
 register_lighteval_task(LIGHTEVAL_TASKS, "extended", "lcb", "lcb:codegeneration", 0)
 register_lighteval_task(LIGHTEVAL_TASKS, "extended", "lcb_v4", "lcb:codegeneration_v4", 0)
 
@@ -62,7 +67,9 @@ SUPPORTED_BENCHMARKS = get_lighteval_tasks()
 
 
 def run_lighteval_job(
-    benchmark: str, training_args: Union["SFTConfig", "GRPOConfig"], model_args: "ModelConfig"
+    benchmark: str,
+    training_args: Union["SFTConfig", "GRPOConfig"],
+    model_args: "ModelConfig",
 ) -> None:
     task_list = LIGHTEVAL_TASKS[benchmark]
     model_name = training_args.hub_model_id
@@ -72,7 +79,7 @@ def run_lighteval_job(
     if get_param_count_from_repo_id(model_name) >= 30_000_000_000:
         tensor_parallel = True
     else:
-        num_gpus = 8
+        num_gpus = 2  # Hack while cluster is full
         tensor_parallel = False
 
     cmd = VLLM_SLURM_PREFIX.copy()
@@ -88,7 +95,10 @@ def run_lighteval_job(
         f"{model_args.trust_remote_code}",
     ]
     if training_args.system_prompt is not None:
-        cmd_args.append(f"--system_prompt={training_args.system_prompt}")
+        # encode to base64 to avoid issues with special characters
+        # we decode in the sbatch script
+        prompt_encoded = base64.b64encode(training_args.system_prompt.encode()).decode()
+        cmd_args.append(prompt_encoded)
     cmd[-1] += " " + " ".join(cmd_args)
     subprocess.run(cmd, check=True)
 

src/open_r1/utils/hub.py

@@ -76,7 +76,8 @@ def check_hub_revision_exists(training_args: SFTConfig | GRPOConfig):
             # If the revision exists, we next check it has a README file
             if training_args.hub_model_revision in revisions:
                 repo_files = list_repo_files(
-                    repo_id=training_args.hub_model_id, revision=training_args.hub_model_revision
+                    repo_id=training_args.hub_model_id,
+                    revision=training_args.hub_model_revision,
                 )
                 if "README.md" in repo_files and training_args.overwrite_hub_revision is False:
                     raise ValueError(

src/open_r1/utils/import_utils.py

@@ -21,3 +21,10 @@ _e2b_available = _is_package_available("e2b")
 
 def is_e2b_available() -> bool:
     return _e2b_available
+
+
+_morph_available = _is_package_available("morphcloud")
+
+
+def is_morph_available() -> bool:
+    return _morph_available

src/open_r1/utils/ioi/__init__.py

@@ -1,12 +0,0 @@
-from .piston_client import get_piston_client_from_env, get_slurm_piston_endpoints
-from .scoring import SubtaskResult, score_subtask
-from .utils import add_includes
-
-
-__all__ = [
-    "get_piston_client_from_env",
-    "get_slurm_piston_endpoints",
-    "score_subtask",
-    "add_includes",
-    "SubtaskResult",
-]

src/open_r1/utils/model_utils.py

@@ -1,16 +1,12 @@
-from transformers import AutoTokenizer, PreTrainedTokenizer
+import torch
+from transformers import AutoModelForCausalLM, AutoTokenizer, PreTrainedTokenizer
 
-from trl import ModelConfig
+from trl import ModelConfig, get_kbit_device_map, get_quantization_config
 
 from ..configs import GRPOConfig, SFTConfig
 
 
-DEFAULT_CHAT_TEMPLATE = "{% for message in messages %}\n{% if message['role'] == 'user' %}\n{{ '<|user|>\n' + message['content'] + eos_token }}\n{% elif message['role'] == 'system' %}\n{{ '<|system|>\n' + message['content'] + eos_token }}\n{% elif message['role'] == 'assistant' %}\n{{ '<|assistant|>\n'  + message['content'] + eos_token }}\n{% endif %}\n{% if loop.last and add_generation_prompt %}\n{{ '<|assistant|>' }}\n{% endif %}\n{% endfor %}"
-
-
-def get_tokenizer(
-    model_args: ModelConfig, training_args: SFTConfig | GRPOConfig, auto_set_chat_template: bool = True
-) -> PreTrainedTokenizer:
+def get_tokenizer(model_args: ModelConfig, training_args: SFTConfig | GRPOConfig) -> PreTrainedTokenizer:
     """Get the tokenizer for the model."""
     tokenizer = AutoTokenizer.from_pretrained(
         model_args.model_name_or_path,
@@ -20,7 +16,27 @@ def get_tokenizer(
 
     if training_args.chat_template is not None:
         tokenizer.chat_template = training_args.chat_template
-    elif auto_set_chat_template and tokenizer.get_chat_template() is None:
-        tokenizer.chat_template = DEFAULT_CHAT_TEMPLATE
 
     return tokenizer
+
+
+def get_model(model_args: ModelConfig, training_args: SFTConfig | GRPOConfig) -> AutoModelForCausalLM:
+    """Get the model"""
+    torch_dtype = (
+        model_args.torch_dtype if model_args.torch_dtype in ["auto", None] else getattr(torch, model_args.torch_dtype)
+    )
+    quantization_config = get_quantization_config(model_args)
+    model_kwargs = dict(
+        revision=model_args.model_revision,
+        trust_remote_code=model_args.trust_remote_code,
+        attn_implementation=model_args.attn_implementation,
+        torch_dtype=torch_dtype,
+        use_cache=False if training_args.gradient_checkpointing else True,
+        device_map=get_kbit_device_map() if quantization_config is not None else None,
+        quantization_config=quantization_config,
+    )
+    model = AutoModelForCausalLM.from_pretrained(
+        model_args.model_name_or_path,
+        **model_kwargs,
+    )
+    return model

src/open_r1/utils/routed_morph.py

@@ -0,0 +1,120 @@
+# coding=utf-8
+# Copyright 2025 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from typing import List, Optional
+
+import requests
+
+
+class RoutedMorphSandbox:
+    """
+    Client for the MorphCloud router service that mimics the API of MorphCloud's Sandbox.
+
+    This class provides a simple interface to execute code via a central MorphCloud router,
+    which manages sandbox creation and cleanup. It allows batch processing of multiple scripts
+    in a single request for improved efficiency.
+
+    Attributes:
+        router_url (str): The URL of the MorphCloud router service.
+        timeout (int): Execution timeout in seconds.
+        request_timeout (int): HTTP request timeout in seconds.
+    """
+
+    def __init__(self, router_url: str, timeout: int = 300, request_timeout: int = 60):
+        """
+        Initialize the routed MorphCloud sandbox client.
+
+        Args:
+            router_url: The URL of the MorphCloud router, including host and port.
+            timeout: Default execution timeout in seconds.
+            request_timeout: Default HTTP request timeout in seconds.
+        """
+        self.router_url = router_url
+        self.timeout = timeout
+        self.request_timeout = request_timeout
+
+    def run_code(
+        self,
+        scripts: List[str],
+        languages: Optional[List[str]] = None,
+        timeout: Optional[int] = None,
+        request_timeout: Optional[int] = None,
+    ) -> List:
+        """
+        Execute multiple scripts using MorphCloud via the router.
+
+        Args:
+            scripts: List of code scripts to execute.
+            languages: List of programming languages for each script. If None, defaults to Python for all scripts.
+            timeout: Execution timeout in seconds. If None, uses the instance timeout.
+            request_timeout: HTTP request timeout in seconds. If None, uses the instance request_timeout.
+
+        Returns:
+            List of execution results with text and exception_str properties.
+        """
+
+        actual_timeout = timeout if timeout is not None else self.timeout
+        actual_request_timeout = request_timeout if request_timeout is not None else self.request_timeout
+
+        # Default to Python for all scripts if languages is not provided
+        if languages is None:
+            languages = ["python"] * len(scripts)
+
+        payload = {
+            "scripts": scripts,
+            "languages": languages,
+            "timeout": actual_timeout,
+            "request_timeout": actual_request_timeout,
+        }
+
+        try:
+            endpoint = f"http://{self.router_url}/execute_batch"
+            response = requests.post(endpoint, json=payload, timeout=actual_request_timeout)
+
+            if response.status_code != 200:
+                error = f"Request to MorphCloud router failed with status code: {response.status_code}"
+                print(error)
+
+                results = []
+                for _ in scripts:
+                    results.append(type("obj", (object,), {"text": None, "exception_str": error}))
+                return results
+
+            response_data = response.json()
+            results = []
+
+            for item in response_data:
+                # Log the response data to see what we're getting
+                # print(f"RoutedMorphSandbox: Got response item: {item}")
+                result = type(
+                    "obj",
+                    (object,),
+                    {
+                        "text": item.get("text"),
+                        "exception_str": item.get("exception_str"),
+                    },
+                )
+                results.append(result)
+
+            return results
+
+        except Exception as e:
+            error = f"Error communicating with MorphCloud router: {str(e)}"
+            print(error)
+
+            results = []
+            for _ in scripts:
+                results.append(type("obj", (object,), {"text": None, "exception_str": error}))
+            return results

src/open_r1/utils/routed_sandbox.py

@@ -0,0 +1,109 @@
+# coding=utf-8
+# Copyright 2025 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from typing import List, Optional
+
+import requests
+from e2b_code_interpreter.models import Execution, ExecutionError, Result
+
+
+class RoutedSandbox:
+    """
+    A sandbox environment that routes code execution requests to the E2B Router.
+    This class is designed for batched execution of scripts, primarily for Python code.
+    It mimics the usage of 'Sandbox' from 'e2b_code_interpreter', but adds support for batch processing.
+
+    Attributes:
+        router_url (str): The URL of the E2B Router to which code execution requests are sent.
+    """
+
+    def __init__(self, router_url: str):
+        """
+        Initializes the RoutedSandbox with the specified router URL.
+
+        Args:
+            router_url (str): The URL of the E2B Router.
+        """
+        self.router_url = router_url
+
+    def run_code(
+        self,
+        scripts: list[str],
+        languages: Optional[List[str]] = None,
+        timeout: Optional[int] = None,
+        request_timeout: Optional[int] = None,
+    ) -> list[Execution]:
+        """
+        Executes a batch of scripts in the sandbox environment.
+
+        Args:
+            scripts (list[str]): A list of code scripts to execute.
+            languages (list[str], optional): List of programming languages for each script. If None, defaults to Python for all scripts.
+            timeout (Optional[int], optional): The maximum execution time for each script in seconds. Defaults to 300 seconds.
+            request_timeout (Optional[int], optional): The timeout for the HTTP request in seconds. Defaults to 30 seconds.
+
+        Returns:
+            list[Execution]: A list of Execution objects containing the results, logs, and errors (if any) for each script.
+        """
+        # Set default values for timeouts if not provided
+        if timeout is None:
+            timeout = 300  # Default to 5 minutes
+        if request_timeout is None:
+            request_timeout = 30  # Default to 30 seconds
+
+        # Default to Python for all scripts if languages is not provided
+        if languages is None:
+            languages = ["python"] * len(scripts)
+
+        # Prepare the payload for the HTTP POST request
+        payload = {
+            "scripts": scripts,
+            "languages": languages,
+            "timeout": timeout,
+            "request_timeout": request_timeout,
+        }
+
+        # Send the request to the E2B Router
+        response = requests.post(f"http://{self.router_url}/execute_batch", json=payload)
+        if not response.ok:
+            print(f"Request failed with status code: {response.status_code}")
+
+        # Parse the response and construct Execution objects
+        results = response.json()
+        output = []
+        for result in results:
+            if result["execution"] is None:
+                # If execution is None, create an empty Execution object
+                # This can happen when a script times out or fails to execute
+                execution = Execution()
+            else:
+                execution = Execution(
+                    results=[Result(**r) for r in result["execution"]["results"]],
+                    logs=result["execution"]["logs"],
+                    error=(ExecutionError(**result["execution"]["error"]) if result["execution"]["error"] else None),
+                    execution_count=result["execution"]["execution_count"],
+                )
+            output.append(execution)
+
+        return output
+
+
+if __name__ == "__main__":
+    # for local testing launch an E2B router with: python scripts/e2b_router.py
+    sbx = RoutedSandbox(router_url="0.0.0.0:8000")
+    codes = ["print('hello world')", "print('hello world)"]
+    executions = sbx.run_code(codes)  # Execute Python inside the sandbox
+
+    print(executions)

src/open_r1/utils/wandb_logging.py

@@ -9,3 +9,5 @@ def init_wandb_training(training_args):
         os.environ["WANDB_ENTITY"] = training_args.wandb_entity
     if training_args.wandb_project is not None:
         os.environ["WANDB_PROJECT"] = training_args.wandb_project
+    if training_args.wandb_run_group is not None:
+        os.environ["WANDB_RUN_GROUP"] = training_args.wandb_run_group

tests/slow/test_code_reward.py

@@ -17,13 +17,16 @@ import unittest
 
 from datasets import load_dataset
 
+from e2b_code_interpreter.models import Execution, ExecutionError
 from open_r1.rewards import code_reward, ioi_code_reward
+from open_r1.utils.routed_morph import RoutedMorphSandbox
+from open_r1.utils.routed_sandbox import RoutedSandbox
 
 
 class TestCodeRewards(unittest.TestCase):
     def test_python_code_reward(self):
         # requires E2B, see the README.md file
-        code_dataset = load_dataset("open-r1/verifiable-coding-problems-python_decontaminated-tested")
+        code_dataset = load_dataset("open-r1/verifiable-coding-problems-python_decontaminated-tested-shuffled")
         NUM_SAMPLES = 20
         samples = code_dataset["train"].select(range(NUM_SAMPLES))
         test_completions = [[{"content": sample["gold_standard_solution"]}] for sample in samples]
@@ -32,6 +35,42 @@ class TestCodeRewards(unittest.TestCase):
         print(rewards)
         assert rewards == [1.0] * NUM_SAMPLES
 
+    def test_e2b_router(self):
+        # run router locally: python scripts/e2b_router.py
+        code_dataset = load_dataset("open-r1/verifiable-coding-problems-python_decontaminated-tested-shuffled")
+        NUM_SAMPLES = 128
+        samples = code_dataset["train"].select(range(NUM_SAMPLES))
+        test_completions = [[{"content": sample["gold_standard_solution"]}] for sample in samples]
+        reward_kwargs = {"verification_info": [sample["verification_info"] for sample in samples]}
+        rewards = code_reward(test_completions, e2b_router_url="0.0.0.0:8000", **reward_kwargs)
+        print(rewards)
+        assert rewards == [1.0] * NUM_SAMPLES
+
+    def test_e2b_router_parallel(self):
+        # run router locally: python scripts/e2b_router.py
+        code_dataset = load_dataset("open-r1/verifiable-coding-problems-python_decontaminated-tested-shuffled")
+
+        BATCH_SIZE = 32
+        NUM_SAMPLES = 256
+
+        def batch_code_reward(examples):
+            test_completions = [[{"content": solution}] for solution in examples["gold_standard_solution"]]
+            reward_kwargs = {
+                "verification_info": [verification_info for verification_info in examples["verification_info"]]
+            }
+            rewards = code_reward(test_completions, e2b_router_url="0.0.0.0:8000", **reward_kwargs)
+            assert rewards == [1.0] * BATCH_SIZE
+            return examples
+
+        code_dataset = code_dataset["train"].select(range(NUM_SAMPLES))
+        code_dataset = code_dataset.map(
+            batch_code_reward,
+            batched=True,
+            batch_size=BATCH_SIZE,
+            num_proc=4,
+            load_from_cache_file=False,
+        )
+
     def test_ioi_code_reward(self):
         # This slow test case requires spinning up a bunch (I tested with ~64) of piston workers, see docs here
         # slurm/piston/README.md
@@ -45,6 +84,136 @@ class TestCodeRewards(unittest.TestCase):
         print(rewards)
         assert rewards == [1.0] * NUM_SAMPLES
 
+    def test_e2b_router_run_code_success(self):
+        # run router locally: python scripts/e2b_router.py
+        routed_sandbox = RoutedSandbox(router_url="localhost:8000")
+        scripts = [
+            "print('hello from integration test')",
+            "result = 2 + 2\nprint(result)",
+        ]
+
+        results = routed_sandbox.run_code(scripts)
+
+        assert len(results) == 2
+
+        for result in results:
+            assert isinstance(result, Execution)
+            # assert result.exit_code == 0
+            assert result.error is None
+            assert "hello" in result.logs["stdout"][0] or "4" in result.logs["stdout"][0]
+
+    def test_e2b_router_run_code_with_error(self):
+        # run router locally: python scripts/e2b_router.py
+
+        routed_sandbox = RoutedSandbox(router_url="localhost:8000")
+        scripts = ["print('this is fine')", "print('unterminated string"]
+
+        results = routed_sandbox.run_code(scripts)
+
+        assert len(results) == 2
+
+        # First one should be okay
+        # assert results[0].exit_code == 0 # Execution object has no attribute 'exit_code'
+        assert results[0].error is None
+        assert "this is fine" in results[0].logs["stdout"][0]
+
+        # Second one should have a syntax error
+
+        # assert results[1].exit_code != 0 # Execution object has no attribute 'exit_code'
+        assert results[1].error is not None
+        assert isinstance(results[1].error, ExecutionError)
+        assert "SyntaxError" in results[1].error.name
+
+    def test_python_code_reward_morph(self):
+        # requires MorphCloud, see the README.md file
+        code_dataset = load_dataset("open-r1/verifiable-coding-problems-python_decontaminated-tested-shuffled")
+        NUM_SAMPLES = 20
+        samples = code_dataset["train"].select(range(NUM_SAMPLES))
+        test_completions = [[{"content": sample["gold_standard_solution"]}] for sample in samples]
+        reward_kwargs = {
+            "verification_info": [sample["verification_info"] for sample in samples],
+            "provider_type": "morph",
+        }
+        rewards = code_reward(test_completions, **reward_kwargs)
+        print(rewards)
+        assert rewards == [1.0] * NUM_SAMPLES
+
+    def test_morph_router(self):
+        # run router locally: python scripts/morph_router.py --port 8001 --max_num_sandboxes 20
+        code_dataset = load_dataset("open-r1/verifiable-coding-problems-python_decontaminated-tested-shuffled")
+        NUM_SAMPLES = 32
+        samples = code_dataset["train"].select(range(NUM_SAMPLES))
+        test_completions = [[{"content": sample["gold_standard_solution"]}] for sample in samples]
+        reward_kwargs = {
+            "verification_info": [sample["verification_info"] for sample in samples],
+            "provider_type": "morph",
+            "morph_router_url": "0.0.0.0:8001",
+        }
+        rewards = code_reward(test_completions, **reward_kwargs)
+        print(rewards)
+        assert rewards == [1.0] * NUM_SAMPLES
+
+    def test_morph_router_parallel(self):
+        # run router locally: python scripts/morph_router.py --port 8001 --max_num_sandboxes 20
+        code_dataset = load_dataset("open-r1/verifiable-coding-problems-python_decontaminated-tested-shuffled")
+
+        BATCH_SIZE = 32
+        NUM_SAMPLES = 256
+
+        def batch_code_reward(examples):
+            test_completions = [[{"content": solution}] for solution in examples["gold_standard_solution"]]
+            reward_kwargs = {
+                "verification_info": [verification_info for verification_info in examples["verification_info"]],
+                "provider_type": "morph",
+                "morph_router_url": "0.0.0.0:8001",
+            }
+            rewards = code_reward(test_completions, **reward_kwargs)
+            assert rewards == [1.0] * BATCH_SIZE
+            return examples
+
+        code_dataset = code_dataset["train"].select(range(NUM_SAMPLES))
+        code_dataset = code_dataset.map(
+            batch_code_reward,
+            batched=True,
+            batch_size=BATCH_SIZE,
+            num_proc=4,
+            load_from_cache_file=False,
+        )
+
+    def test_morph_router_run_code_success(self):
+        # run router locally: python scripts/morph_router.py --port 8001 --max_num_sandboxes 20
+
+        routed_sandbox = RoutedMorphSandbox(router_url="localhost:8001")
+        scripts = [
+            "print('hello from morph integration test')",
+            "result = 2 + 2\nprint(result)",
+        ]
+
+        results = routed_sandbox.run_code(scripts)
+
+        assert len(results) == 2
+
+        for result in results:
+            assert result.exception_str is None
+            assert "hello" in result.text or "4" in result.text
+
+    def test_morph_router_run_code_with_error(self):
+        # run router locally: python scripts/morph_router.py --port 8001 --max_num_sandboxes 20
+
+        routed_sandbox = RoutedMorphSandbox(router_url="localhost:8001")
+        scripts = ["print('this is fine with morph')", "print('unterminated string"]
+
+        results = routed_sandbox.run_code(scripts)
+
+        assert len(results) == 2
+
+        # First one should be okay
+        assert results[0].exception_str is None
+        assert "this is fine with morph" in results[0].text
+
+        # Second one should have a syntax error
+        assert "SyntaxError" in results[1].text
+
 
 if __name__ == "__main__":
     unittest.main()

tests/test_rewards.py

@@ -15,6 +15,7 @@
 
 import unittest
 
+from dotenv import load_dotenv
 from open_r1.configs import GRPOScriptArguments
 from open_r1.rewards import (
     accuracy_reward,
@@ -23,12 +24,16 @@ from open_r1.rewards import (
     get_cosine_scaled_reward,
     get_repetition_penalty_reward,
     get_reward_funcs,
+    get_soft_overlong_punishment,
     len_reward,
     reasoning_steps_reward,
     tag_count_reward,
 )
 
 
+load_dotenv()
+
+
 class TestGetRewardFuncs(unittest.TestCase):
     def test_get_reward_funcs(self):
         """Test get_reward_funcs with various reward functions."""
@@ -82,7 +87,13 @@ class TestRewards(unittest.TestCase):
         """Test accuracy_reward with an incorrect answer."""
         completion = [[{"content": r"\boxed{\frac{64}{400}}"}]]
         solution = [r"\frac{63}{400}"]
+        rewards = accuracy_reward(completion, solution)
+        self.assertEqual(rewards[0], 0.0)
 
+    def test_accuracy_reward_wrong_answer_no_latex(self):
+        """Test accuracy_reward with an incorrect answer and gold solution with no latex."""
+        completion = [[{"content": r"\boxed{3}"}]]
+        solution = ["6"]
         rewards = accuracy_reward(completion, solution)
         self.assertEqual(rewards[0], 0.0)
 
@@ -127,7 +138,10 @@ class TestRewards(unittest.TestCase):
 
     def test_multiple_completions(self):
         """Test handling multiple completions at once."""
-        completions = [[{"content": r"\boxed{\frac{63}{400}}"}], [{"content": r"\boxed{\frac{64}{400}}"}]]
+        completions = [
+            [{"content": r"\boxed{\frac{63}{400}}"}],
+            [{"content": r"\boxed{\frac{64}{400}}"}],
+        ]
         solutions = [r"\frac{63}{400}", r"\frac{63}{400}"]
 
         rewards = accuracy_reward(completions, solutions)
@@ -148,11 +162,31 @@ class TestRewards(unittest.TestCase):
 
         test_cases = [
             # Correct answers with different lengths
-            (r"\boxed{\frac{63}{400}}", r"\frac{63}{400}", 20, 0.943),  # Short correct answer
-            (r"\boxed{\frac{63}{400}}", r"\frac{63}{400}", 80, 0.547),  # Long correct answer
+            (
+                r"\boxed{\frac{63}{400}}",
+                r"\frac{63}{400}",
+                20,
+                0.943,
+            ),  # Short correct answer
+            (
+                r"\boxed{\frac{63}{400}}",
+                r"\frac{63}{400}",
+                80,
+                0.547,
+            ),  # Long correct answer
             # Wrong answers with different lengths
-            (r"\boxed{\frac{64}{400}}", r"\frac{63}{400}", 20, -0.942),  # Short wrong answer
-            (r"\boxed{\frac{64}{400}}", r"\frac{63}{400}", 80, -0.547),  # Long wrong answer
+            (
+                r"\boxed{\frac{64}{400}}",
+                r"\frac{63}{400}",
+                20,
+                -0.942,
+            ),  # Short wrong answer
+            (
+                r"\boxed{\frac{64}{400}}",
+                r"\frac{63}{400}",
+                80,
+                -0.547,
+            ),  # Long wrong answer
         ]
 
         for content, solution, content_len, expected_reward in test_cases:
@@ -172,7 +206,10 @@ class TestRewards(unittest.TestCase):
 
     def test_same_length_responses(self):
         """Test len_reward when all responses have the same length."""
-        completions = [[{"content": r"\boxed{\frac{63}{400}}"}], [{"content": r"\boxed{\frac{64}{400}}"}]]
+        completions = [
+            [{"content": r"\boxed{\frac{63}{400}}"}],
+            [{"content": r"\boxed{\frac{64}{400}}"}],
+        ]
         solutions = [r"\frac{63}{400}", r"\frac{63}{400}"]
 
         rewards = len_reward(completions, solutions)
@@ -232,7 +269,10 @@ class TestRewards(unittest.TestCase):
 
     def test_unparseable_solution(self):
         """Test len_reward with unparseable solution."""
-        completions = [[{"content": r"\boxed{answer}"}], [{"content": r"\boxed{answer} " + "x" * 10}]]
+        completions = [
+            [{"content": r"\boxed{answer}"}],
+            [{"content": r"\boxed{answer} " + "x" * 10}],
+        ]
         solutions = ["unparseable_latex", "unparseable_latex"]
 
         rewards = len_reward(completions, solutions)
@@ -407,6 +447,40 @@ class TestRepetitionPenaltyReward(unittest.TestCase):
         rewards = tag_count_reward(completion)
         self.assertEqual(rewards[0], 0.0)
 
+    def test_full_repetition_with_language(self):
+        reward_fn = get_repetition_penalty_reward(ngram_size=2, max_penalty=-1.0, language="en")
+        completions = [[{"content": "that that that that that"}]]
+        rewards = reward_fn(completions)
+        self.assertEqual(rewards, [-0.75])
+        # begin test for zh language
+        reward_fn = get_repetition_penalty_reward(ngram_size=2, max_penalty=-1.0, language="zh")
+        completions = [[{"content": "这个这个这个这个这个"}]]
+        rewards = reward_fn(completions)
+        self.assertEqual(rewards, [-0.75])
+
+    def test_soft_overlong_punishment_short_completion(self):
+        """Test soft overlong punishment reward function with a short completion."""
+        # length 50, with max=100 and soft cache=20, reward should be 0.
+        reward_fn = get_soft_overlong_punishment(max_completion_len=100, soft_punish_cache=20)
+        completion_ids = [[1] * 50]  # 50 <= 80
+        rewards = reward_fn(completion_ids=completion_ids)
+        self.assertEqual(rewards, [0])
+
+    def test_soft_overlong_punishment_long_completion(self):
+        """Test soft overlong punishment reward function with a longer than max completion."""
+        # 110 > 100, reward should be -1.
+        reward_fn = get_soft_overlong_punishment(max_completion_len=100, soft_punish_cache=20)
+        completion_ids = [[1] * 110]
+        rewards = reward_fn(completion_ids)
+        self.assertEqual(rewards, [-1])
+
+    def test_soft_overlong_punishment_intermediate_completion(self):
+        """Test soft overlong punishment reward function for intermediate length completion."""
+        reward_fn = get_soft_overlong_punishment(max_completion_len=100, soft_punish_cache=20)
+        completion_ids = [[1] * 90]  # 90 is between 80 and 100
+        rewards = reward_fn(completion_ids)
+        self.assertAlmostEqual(rewards[0], -0.5, places=4)
+
 
 class TestCodeFormat(unittest.TestCase):
     def test_correct_python_format(self):

tests/utils/test_data.py

@@ -0,0 +1,129 @@
+# Copyright 2025 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import unittest
+from dataclasses import asdict
+
+from datasets import DatasetDict, load_dataset
+
+from open_r1.configs import DatasetConfig, DatasetMixtureConfig, ScriptArguments
+from open_r1.utils.data import get_dataset
+
+
+class TestGetDataset(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        cls.dataset_name = "trl-internal-testing/zen"
+        cls.dataset_config = "conversational_preference"
+        cls.ref_dataset = load_dataset(cls.dataset_name, cls.dataset_config)
+
+    def test_dataset_and_config_name(self):
+        args = ScriptArguments(dataset_name=self.dataset_name, dataset_config=self.dataset_config)
+        dataset = get_dataset(args)
+        self.assertIsInstance(dataset, DatasetDict)
+        self.assertIn("train", dataset)
+        self.assertEqual(len(dataset["train"]), len(self.ref_dataset["train"]))
+
+    def test_unweighted_mixture(self):
+        """Mix train and test splits of the same dataset."""
+        dataset_configs = [
+            DatasetConfig(id=self.dataset_name, config=self.dataset_config, split="train", columns=None, weight=None),
+            DatasetConfig(id=self.dataset_name, config=self.dataset_config, split="test", columns=None, weight=None),
+        ]
+        dataset_mixture = DatasetMixtureConfig(
+            datasets=dataset_configs,
+        )
+        args = ScriptArguments(dataset_mixture=asdict(dataset_mixture))
+        dataset = get_dataset(args)
+        self.assertIsInstance(dataset, DatasetDict)
+        self.assertIn("train", dataset)
+        self.assertEqual(len(dataset["train"]), len(self.ref_dataset["train"]) + len(self.ref_dataset["test"]))
+
+    def test_weighted_mixture(self):
+        """Test loading a dataset mixture with weights."""
+        dataset_configs = [
+            DatasetConfig(id=self.dataset_name, config=self.dataset_config, split="train", columns=None, weight=0.25),
+            DatasetConfig(id=self.dataset_name, config=self.dataset_config, split="test", columns=None, weight=0.5),
+        ]
+        dataset_mixture = DatasetMixtureConfig(
+            datasets=dataset_configs,
+        )
+        args = ScriptArguments(dataset_mixture=asdict(dataset_mixture))
+        dataset = get_dataset(args)
+        self.assertIsInstance(dataset, DatasetDict)
+        self.assertIn("train", dataset)
+        self.assertEqual(
+            len(dataset["train"]), len(self.ref_dataset["train"]) // 4 + len(self.ref_dataset["test"]) // 2
+        )
+
+    def test_mixture_and_test_split(self):
+        """Test loading a dataset mixture with test split."""
+        dataset_configs = [
+            DatasetConfig(
+                id=self.dataset_name, config=self.dataset_config, split="train[:10]", columns=None, weight=None
+            ),
+        ]
+        dataset_mixture = DatasetMixtureConfig(datasets=dataset_configs, test_split_size=0.2)
+        args = ScriptArguments(dataset_name=None, dataset_mixture=asdict(dataset_mixture))
+        dataset = get_dataset(args)
+        self.assertIsInstance(dataset, DatasetDict)
+        self.assertIn("train", dataset)
+        self.assertIn("test", dataset)
+        self.assertEqual(len(dataset["train"]), 8)
+        self.assertEqual(len(dataset["test"]), 2)
+
+    def test_mixture_column_selection(self):
+        """Test loading a dataset mixture with column selection."""
+        dataset_configs = [
+            DatasetConfig(
+                id=self.dataset_name,
+                config=self.dataset_config,
+                split="train",
+                columns=["prompt", "chosen"],
+                weight=None,
+            ),
+        ]
+        dataset_mixture = DatasetMixtureConfig(
+            datasets=dataset_configs,
+        )
+        args = ScriptArguments(dataset_mixture=asdict(dataset_mixture))
+        dataset = get_dataset(args)
+        self.assertIsInstance(dataset, DatasetDict)
+        self.assertIn("train", dataset)
+        self.assertIn("prompt", dataset["train"].column_names)
+        self.assertIn("chosen", dataset["train"].column_names)
+
+    def test_mixture_with_mismatched_columns(self):
+        dataset_configs = [
+            DatasetConfig(
+                id=self.dataset_name, config=self.dataset_config, split="train", columns=["prompt"], weight=None
+            ),
+            DatasetConfig(
+                id=self.dataset_name, config=self.dataset_config, split="train", columns=["chosen"], weight=None
+            ),
+        ]
+        dataset_mixture = DatasetMixtureConfig(
+            datasets=dataset_configs,
+        )
+        with self.assertRaises(ValueError) as context:
+            _ = ScriptArguments(dataset_mixture=asdict(dataset_mixture))
+        self.assertIn("Column names must be consistent", str(context.exception))
+
+    def test_no_dataset_name_or_mixture(self):
+        with self.assertRaises(ValueError) as context:
+            _ = ScriptArguments(dataset_name=None, dataset_mixture=None)
+        self.assertIn("Either `dataset_name` or `dataset_mixture` must be provided", str(context.exception))
+
+
+if __name__ == "__main__":
+    unittest.main()