sail
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Qwen2.5-Math-1.5B-Oat-Zero

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 ---
 library_name: transformers
+license: apache-2.0
+base_model:
+- Qwen/Qwen2.5-Math-1.5B
 ---
+# Qwen2.5-Math-1.5B-Oat-Zero
+## Links
+- 📜 [Paper](https://github.com/sail-sg/understand-r1-zero/blob/main/understand-r1-zero.pdf)
+- 💻 [GitHub](https://github.com/sail-sg/understand-r1-zero)
+- 🤗 [Oat-Zero Collection](https://huggingface.co/collections/sail/oat-zero-understanding-r1-zero-like-training-67dcdb07b9f3eb05f1501c4a)
+## Introduction
+This model is trained by the minimalist R1-Zero recipe introduced in our paper:
+- **Algorithm**: Dr. DRPO
+- **Data**: level 3-5 questions from MATH dataset
+- **Base model**: [Qwen/Qwen2.5-Math-1.5B](https://huggingface.co/Qwen/Qwen2.5-Math-1.5B)
+- **Template**: Qwen-Math
+Evaluation results on widely used math benchmarks are shown below:
+<img src="https://raw.githubusercontent.com/sail-sg/understand-r1-zero/refs/heads/main/assets/benchmark_table.png" width=100%/>
+## Usage
+```python
+import vllm
+def apply_qwen_math_template(question: str):
+    return (
+        "<|im_start|>system\nPlease reason step by step, and put your final answer within \\boxed{}.<|im_end|>\n<|im_start|>user\n"
+        + question
+        + "<|im_end|>\n<|im_start|>assistant\n"
+    )
+def apply_r1_template(question: str):
+    return (
+        "A conversation between User and Assistant. The User asks a question, and the Assistant solves it. The Assistant first thinks about the reasoning process in the mind and then provides the User with the answer. "
+        "The reasoning process is enclosed within <think> </think> and answer is enclosed within <answer> </answer> tags, respectively, i.e., <think> reasoning process here </think> <answer> answer here </answer>.\nUser: "
+        + question
+        + "\nAssistant: <think>"
+    )
+model_name = "sail/Qwen2.5-Math-1.5B-Oat-Zero"
+sampling_params = vllm.SamplingParams(
+    n=1,
+    temperature=0,
+    top_p=1,
+    max_tokens=3000,
+)
+model = vllm.LLM(
+    model_name,
+    max_model_len=4096,
+    dtype="bfloat16",
+    enable_prefix_caching=True,
+)
+if "Llama-3.2-3B-Oat-Zero" in model_name:
+    apply_template = apply_r1_template
+else:
+    apply_template = apply_qwen_math_template
+prompts = [
+    "How many positive whole-number divisors does 196 have?"
+]
+prompts = list(map(apply_template, prompts))
+outputs = model.generate(prompts, sampling_params)
+print(outputs)
+```
+## Citation
+```latex
+@misc{liu2025understanding,
+  title={Understanding R1-Zero-Like Training: A Critical Perspective},
+  author={Zichen Liu and Changyu Chen and Wenjun Li and Penghui Qi and Tianyu Pang and Chao Du and Wee Sun Lee and Min Lin},
+  year={2025},
+  howpublished={\url{https://github.com/sail-sg/understand-r1-zero}},
+}
+```