Leanstral 1.5: Proof Abundance for All
Leanstral 1.5, a free Apache-2.0 licensed model with 6B active parameters, delivers a major performance upgrade in formal verification, saturating miniF2F, solving 587/672 PutnamBench problems, and achieving state-of-the-art results on FATE-H (87%) and FATE-X.
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- Why it matters
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- Technical impact
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- Risk note
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