---
base_model:
- allenai/OLMo-2-1124-7B-SFT
datasets:
- math
language:
- en
license: apache-2.0
metrics:
- accuracy
pipeline_tag: text-generation
library_name: transformers
---

# OLMo-2-7B-SFT-GRPO-MATH-1EPOCH

This model is a GRPO-fine-tuned version of `allenai/OLMo-2-1124-7B-SFT` trained on the MATH dataset.

This model is associated with the paper [Learning to Reason without External Rewards](https://huggingface.co/papers/2505.19590), which introduces **Intuitor**, a reinforcement learning method that fine-tunes large language models (LLMs) using *self-certainty*—the model’s own internal confidence—as the sole reward. This approach is built on a novel paradigm called **Reinforcement Learning from Internal Feedback (RLIF)**, enabling models to learn without external rewards, gold labels, or verifiers by optimizing intrinsic signals.

---

## Project Page & Code

*   **Project Page**: [https://sunblaze-ucb.github.io/Intuitor/](https://sunblaze-ucb.github.io/Intuitor/)
*   **GitHub Repository**: [https://github.com/sunblaze-ucb/Intuitor](https://github.com/sunblaze-ucb/Intuitor)

## Usage

You can load and use this model with the `transformers` library:

```python
from transformers import AutoModelForCausalLM, AutoTokenizer
import torch

model_name = "sunblaze-ucb/OLMo-2-7B-SFT-GRPO-MATH-1EPOCH"

# It's recommended to load with bfloat16 for OLMo-2 models if supported by your hardware
tokenizer = AutoTokenizer.from_pretrained(model_name)
model = AutoModelForCausalLM.from_pretrained(model_name, torch_dtype=torch.bfloat16)

# Example usage:
prompt = "Question: What is 2 + 2?
Answer:"
input_ids = tokenizer(prompt, return_tensors="pt").input_ids
output = model.generate(input_ids, max_new_tokens=50, do_sample=False)
print(tokenizer.decode(output[0], skip_special_tokens=True))
```

## Citation

```bibtex
@article{zhao2025learning,
  title={Learning to Reason without External Rewards},
  author={Zhao, Xuandong and Kang, Zhewei and Feng, Aosong and Levine, Sergey and Song, Dawn},
  journal={arXiv preprint arXiv:2505.19590},
  year={2025}
}
```