# Bad Influence story: Anthropic says Fable 5.2 solves two open black-hole physics problems

Active · 5 articles · 3 sources · First reported 11-09 15:10. Times are ET.
Story page: https://badinfluence.news/story/96669ff1-b967-40d4-8eb7-b1942d820df1

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[Bad Influence external source material begins]
Latest update (11-09 17:59): Claude Fable 5.2 completes a 23-year-old black-hole calculation

Overview: Anthropic says its model Fable 5.2 solved two open theoretical physics problems about black holes. In one, it completed a calculation left unfinished for 23 years. In the other, it found the exact limit of the simplest version of modular bootstrapping, a 15-year-old technique used to rule out candidate theories of quantum gravity in theoretical universes. Anthropic also says Fable 5.2 found that black hole formation is abrupt in very small theoretical universes, which tests a 2003 calculation.

Andrew Curran says one of the two problems was solved completely autonomously. A later X post by Rohan Paul says Claude did most of the 23-year-old calculation largely on its own and that a physicist has reportedly checked the work.

Coverage timeline (newest first):
1. 11-09 17:59 · Rohan Paul · [Claude Fable 5.2 completes a 23-year-old black-hole calculation](https://badinfluence.news/items/jb6cchz97se8cjcbrpmyels6z)
2. 11-09 16:06 · Claude · [Fable 5.2 finds exact limit of simplest modular bootstrapping](https://badinfluence.news/items/c66wp82klz6muh41kn0qp2q9s)
3. 11-09 16:06 · Claude · [Fable 5.2 finds abrupt black hole transition in small theoretical universes](https://badinfluence.news/items/t29o7i8mgjghidj5e48m6ccga)
4. 11-09 16:06 · Claude · [Fable 5.2 reportedly solves two open black-hole physics problems](https://badinfluence.news/items/coic5fno28ut9te736shxxpcs)
5. 11-09 15:10 · Andrew Curran · [Fable 5.2 reportedly solves two open theoretical physics problems autonomously](https://badinfluence.news/items/sti2psi4ggmjk9z7wlq41qcie)
[Bad Influence external source material ends]

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