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the-decoder.com · published on 2026-07-04 15:12

Mistral AI Open-Sources Leanstral 1.5, Designed Specifically for Lean 4 Formal Verification

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Mistral AI released Leanstral 1.5, an open-source model for formal verification in Lean 4. Beyond math, the model found five previously unknown bugs while scanning 57 open-source repositories.

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