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[ARTICLE · art-55678] src=the-decoder.com ↗ pub= topic=artificial-intelligence verified=true sentiment=· neutral

OpenAI's GPT-5.6 Sol Ultra reportedly solves a 50-year-old math problem in under an hour

OpenAI's GPT-5.6 Sol Ultra produced a proof of the 50-year-old Cycle Double Cover Conjecture in under an hour using 64 parallel subagents, though mathematician Thomas Bloom criticized the lack of citations for prior work.

read1 min views1 publishedJul 11, 2026

OpenAI's GPT-5.6 Sol Ultra produced a proof of the Cycle Double Cover Conjecture in under an hour, using 64 subagents working in parallel. The conjecture had remained unsolved for 50 years. Mathematician Thomas Bloom calls the proof surprisingly elementary but criticizes the lack of citations for known prior work. The bigger question remains: Does AI just recombine existing knowledge, or does it create something new?

The article OpenAI's GPT-5.6 Sol Ultra reportedly solves a 50-year-old math problem in under an hour appeared first on The Decoder.

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