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Articles Tagged “Lean 4”
3 articles found
AI
OpenAI Astra Proves 10 Open Math Problems in Lean 4
OpenAI published machine-checkable Lean 4 proofs for ten long-open math problems from an internal Astra model, at a total compute cost of about $2,000.
Dr. Nova Chen★Aug 6, 2026★6 min read
AI
Leanstral 1.5: An Open-Source Lean 4 Model Brings Formal Proof to Real Code
Mistral's Leanstral 1.5 is an open-source Lean 4 theorem-proving model that saturates miniF2F and flags real bugs, making formal verification practical.
Dr. Nova Chen★Jul 4, 2026★4 min read
AI
AlphaProof Nexus: AI Math Proofs Cracking Erdos Problems, Verified in Lean 4
DeepMind's AlphaProof Nexus solved 9 open Erdos problems with AI math proofs, every step machine-verified in Lean 4. A late-May 2026 milestone explained.
Dr. Nova Chen★Jun 3, 2026★4 min read