Leanstral: Open-Source Foundation for Trustworthy Vibe-Coding★ 76
Mistral AI News6 days agoReleaseMistral AI introduced Leanstral, an open-source code agent designed for Lean 4 and formal proof engineering. The model is available through Apache 2.0 weights, Mistral Vibe, and a Labs API endpoint. Mistral positions it as a cost-efficient alternative for verified coding workflows, with FLTEval benchmarks comparing it against Claude family models and large open-source competitors.
Show HN: Formally verified polygon intersection, Opus 4.8 one-shot
Hacker News (AI keywords)9 days agoNew ToolThis GitHub project presents a formally verified multipolygon intersection algorithm checked in Lean 4. The author argues trust comes from the Lean checker and a small human-reviewed specification, not from trusting LLM output directly. It also documents how Claude Opus versions improved on Lean proof work, with Opus 4.8 reportedly completing larger proof strategies that earlier attempts could not.
Scaling Past Informal AI - Carina Hong, Axiom Math
Latent Space11 days agoCommentaryLatent Space interviews Carina Hong of Axiom Math on verified generation and compounding intelligence. The discussion centers on moving AI from plausible informal answers toward outputs that can be checked or proven. For builders and researchers, the theme matters because verification may become a core layer for reliable reasoning in math, software, and other high-stakes domains.