Mistral AI releases Leanstral 1.5: a free model for formal verification with record results
Mistral AI has released Leanstral 1.5, a free Apache-2.0 licensed model with 119B total and 6B active parameters, achieving state-of-the-art results in formal verification. It saturates the miniF2F benchmark, solves 587/672 PutnamBench problems, and sets new records on FATE-H (87%) and FATE-X (34%). The model also uncovers real-world bugs in open-source repositories.
Mistral
OpenAI





