← Voice corpusEdition 2026-10-10, preview.
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Amazing!

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Yesterday, we made GPT-5.6 Sol Ultra generally available. Today, we're sharing that it produced a proof of the 50-year-old Cycle Double Cover Conjecture using 64 subagents in just under one hour. We're sharing the prompt and proof below. We're excited to see what you all do with Ultra!

__eknight__ ↗
Library as of 2026-10-21