Leanstral 1.5 Released: SOTA on Grad Algebra Benchmark
AlbertQJiang · x · 2026-07-03
A research team has released Le Chaton LEAN (Leanstral 1.5), a language model designed specifically for Lean theorem proving and formalized mathematics, achieving state-of-the-art performance on a graduate-level algebra benchmark.
By deeply integrating LLM capabilities with the Lean formal language, the model pushes the boundaries of AI in high-level mathematical reasoning, marking new progress in formal reasoning.
Related event: Mistral Releases Open-Source Lean 4 Proving Agent Leanstral 1.5(5 posts)→
More from Models
- User catches model failing to parse 400-paper file, citing stale news sources instead — jungofthewon · 2026-10-27
- Odd eval result: Gemini 4.1 Flash gets more accurate when asked to control its CoT — dfrsrchtwts · 2026-10-27
- Poster surprised that v4.1 flash gets more accurate when asked to control its CoT — dfrsrchtwts · 2026-10-27
- Dev claims Anthropic is baking 'sabotage' into model behavior for 'wrong' engineering — cephaloform · 2026-10-27
- Gemini fails at listing unread emails, tells user to search Gmail manually — gethackteam · 2026-10-27
- Meta's Muse Spark Open goes live on Applied Compute for async RL post-training — ypatil125 · 2026-10-27