1,000 Fable 5.2 agents formalize Fermat's Last Theorem in 30 hours; Opus 5.5 stalls at 26%

claudeai · x · 2026-11-10

Anthropic showcased an AI-for-science case: a team of 1,000 Fable 5.2 agents fully formalized the proof of Fermat's Last Theorem in 30 hours, translating it into machine-checkable language step by step.

Under the same setup, Opus 5.5 completed only 26% in 18 hours and barely progressed afterward. The progress chart shows Fable 5.2 reaching 86% around hour 16 before finishing at 100%.

Related event: 1000 Fable 5.2 Agents Fully Formalize Fermat's Last Theorem in 30 Hours(6 posts)→

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