Claude Fable 5.2 Completes 23-Year-Old Black Hole Calculation
Claude Fable 5.2 independently completed a tedious black hole formation calculation that physicists had left unfinished since 2003, finding that black holes form suddenly in tiny universes just as Hawking and Page showed for large ones in 1983. A physicist has verified the work, marking a case where an AI produced checkable new knowledge in fundamental physics rather than merely summarizing existing text.
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Rohan Paul (@rohanpaul_ai) · 2026-11-09 22
Claude Fable 5.2 cracked a black-hole calculation that physicists had left unfinished for 23 years.
A physicist has already checked the work, i.e. this is new knowledge in fundamental physics that came largely from an AI.
In 1983, Stephen Hawking and Don Page showed that when a certain kind of universe heats up, a black hole forms suddenly, like water hitting boiling point, but their method only worked for large universes.
In 2003, physicists laid out the calculation needed for tiny universes, but it was so long and tedious that nobody finished it, until Claude did it largely on its own and found that black holes form suddenly there too.
↳ 引用 @claudeai (Claude): Fable 5.2 solved two open problems in theoretical physics related to black holes.
In the first, Fable 5.2 completed a laborious calculation that had gone unsolved for 23 years.
