AI Achieves Major Breakthrough in Mathematics
GPT-5.6 Sol Ultra proved the Cycle Double Cover Conjecture using 64 subagents in under an hour—first LLM-solved problem from Wikipedia's list of unsolved problems. Grok 4.5 earlier constructed a counterexample to hypercontractivity on the 4-sphere. LeanDojo ecosystem maturing with ITPEval benchmark and four Lean-related papers at ICML 2026 workshops. Deliprao notes that publishing any new conjecture now requires a baseline attempt with frontier models. New: GPT-5.6 Sol solved 6 open Erdős problems in 5 days. Capy (Grok 4.5 Medium) refuted a 30-year-old graph theory conjecture in 8 minutes via Slack. A new benchmark for AI in formal quantum verification (76 Lean 4 tasks) shows top scores ~60/100, with LAD consistently helping, highlighting specific weaknesses like quantum simulation.