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Mistral's open-source Leanstral 1.5 aces formal math benchmarks and catches real bugs in code

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. The article Mistral's open-source Leanstral 1.5 aces formal math benchmarks and catches real bugs in code appeared first on The Decoder.

Mistral's open-source Leanstral 1.5 aces formal math benchmarks and catches real bugs in code
Primary source the-decoder.com ↗

Published July 4, 2026 · Category: AI Briefing

Overview

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.

Details

The article Mistral's open-source Leanstral 1.5 aces formal math benchmarks and catches real bugs in code appeared first on The Decoder.

Source

Originally published at the-decoder.com.

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