Claude Fable 5.2 completes a black hole physics calculation unsolved for 23 years

claudeai · x · 2026-11-10

Anthropic says Claude Fable 5.2 solved two open problems in theoretical physics. The first: physicists showed in 1983 that black holes form abruptly as certain larger theoretical universes heat up; a 2003 calculation to test whether this holds in tiny universes went unsolved for 23 years. Fable 5.2 completed it and found the transition is abrupt there too. Results are written up in preprints.

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