---
license: mit
---

### llmstep: [L]LM proofstep suggestions in Lean
https://github.com/wellecks/llmstep

This model is a Pythia-2.8b-deduped language model fine-tuned on [LeanDojo Benchmark 4](https://zenodo.org/record/8040110).

The model is fine-tuned on sequences of the form:
```bash
[GOAL]tactic-state[PROOFSTEP]next-tactic<|endoftext|>
```
This format corresponds to the proofstep objective from [Han et al ICLR 2022](https://arxiv.org/abs/2102.06203).\
The [python/train](python/train) directory in the repository shows how the model was fine-tuned.

Please see the repository for more details.

```
@misc{llmstep,
  author = {Sean Welleck},
  title = {llmstep: LLM proofstep suggestions in Lean},
  year = {2023},
  publisher = {GitHub},
  journal = {GitHub repository},
  howpublished = {\url{https://github.com/wellecks/llmstep}},
}
```