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Mistral releases Leanstral 1.5 open model for proof engineering

Mistral released Leanstral 1.5, an open-source Lean 4 code agent for formal proofs and verified software. Available via API, Vibe, and Hugging Face, it posts strong benchmark results and found new bugs in 57 Rust repositories.

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TestingCatalog AI News Mistral releases Leanstral 1.5 open model for proof engineering Mistral AI introduces Leanstral 1.5, an open-source code agent for Lean 4 formal proof engineering, now available via Labs API and Hugging Face.
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