mistralai/Leanstral-2603 · Hugging Face

Leanstral is the first open-source code agent designed for Lean 4, a proof assistant capable of expressing complex mathematical objects such as perfectoid spaces and software specifications like properties of Rust fragments. Built as part of the Mistral Small 4 family, it combines multimodal capabilities and an efficient architecture, making it both performant and cost-effective compared to existing closed-source alternatives. For details about the model and its scope, please read the related blog post.