Leanstral 1.5
Open Lean 4 proof model, 119B total and 6B active, under Apache 2.0; solves 587 of 672 PutnamBench problems.
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 (34%).
Official source
Leanstral 1.5: Proof Abundance for Allmistral.ai · published