Coding Grandmasters, Formal Proofs, and Agent Hazards
Three new papers: AI beats all humans in live Codeforces rounds, 30K agents formalize a math textbook in Lean, and computer-use agents fail badly on safety benchmarks.
Formal verification
Tao: Ideas Are Now Free - Math's Bottleneck Has Moved
Terence Tao argues AI has cut the cost of mathematical idea generation to near zero, but verification remains as hard as ever - and our existing academic infrastructure wasn't built for what comes next.
Leanstral Outperforms Claude Sonnet at Formal Code Proofs
Mistral's new open-source Lean 4 agent scores higher than Claude Sonnet on formal proofs at one-fifteenth the cost, raising the bar for trustworthy AI code generation.
Knuth Names Paper After Claude That Solved His Math Conjecture
Claude Opus 4.6 solved a directed graph decomposition conjecture Knuth had worked on for weeks in 31 guided explorations over roughly an hour. Knuth wrote the formal proof himself and titled the paper 'Claude's Cycles.'
Math Olympiad AI Leaderboard - March 2026 Rankings
Rankings of AI models on competition mathematics benchmarks including AIME 2025, IMO, MathArena, and FrontierMath, measuring the cutting edge of mathematical reasoning.
