Leanstral 1.5, miniF2F에서 100% 달성 — 그리고 실제 버그도 잡아낸다
mistral이 miniF2F에서 100%를 기록하고 실제 rust 버그까지 잡아내는 lean 4 모델 leanstral 1.5를 공개했으며, 형식 검증이 이제 오픈소스 코드 보안에 실용적으로 활용 가능해졌음을 시사한다.
mistral ai released leanstral 1.5, a free open-source model fine-tuned for the lean 4 language to formalize mathematical proofs and software verification. the model achieves 100% accuracy on the minif2f benchmark and solves 587 problems on putnambench, outperforming all open-source competitors and trailing only aleph prover. in practical tests, it scanned 57 open-source repositories and identified five previously unknown bugs, including a critical overflow in a rust library. this release signals that open-source models are now capable of handling complex formal verification tasks previously reserved for closed systems. available via hugging face and free api, leanstral 1.5 represents a shift toward verifiable, math-grade ai.