Mistral releases Leanstral 1.5 formal-verification model
Leanstral 1.5: Proof Abundance for All
What happened
Mistral has released Leanstral 1.5, a formal-verification model licensed under Apache 2.0 with 119B total and 6B active parameters. It scores 100% on miniF2F, solves 587 of 672 PutnamBench problems, and sets state-of-the-art scores of 87% on FATE-H and 34% on FATE-X.
Why it matters
The source reports Leanstral 1.5's formal-verification benchmark results and open-source availability, helping readers assess its usefulness in proof engineering.
Hugging FaceReasoningOpen sourceModel releases#Model release#Reasoning#Open-source ecosystem#Hugging Face
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