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 Lean Copilot: LLMs as Copilots for Theorem Proving in Lean
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 Lean Copilot allows large language models (LLMs) to be used in Lean for proof automation, e.g., suggesting tactics/premises and searching for proofs. Users can use our built-in models from [LeanDojo](https://leandojo.org/) or bring their own models that run either locally (w/ or w/o GPUs) or on the cloud (such as GPT-4).