Mistral Releases Leanstral: Open-Source AI Agent for Lean 4

Mistral AI introduced Leanstral, the first open-source code agent designed for Lean 4 formal proofs. The 119B model achieves SOTA performance on multiple benchmarks, including a 100% pass rate on miniF2F, significantly advancing computer-verified mathematical reasoning.

2026-07-03 ~ 2026-07-05 · 5 related posts

• Leanstral 1.5发布，研究生代数基准达SOTA — AlbertQJiang · 2026-07-03
• Leanstral 1.5 Open-Sourced for Lean 4 — sophiamyang · 2026-07-04
• Mistral发布Leanstral 1.5：Apache开源Lean 4代码智能体模型 — sophiamyang · 2026-07-04
• Mistral发布Leanstral：首个面向Lean 4的开源代码智能体 — mervenoyann · 2026-07-04
• Mistral 形式化证明系统 Leanstral 解析 — sophiamyang · 2026-07-05