I Had 72 Hours With the Best AI Model Ever Released. Then the Government Took It Away. (opens in new tab)

Last Monday, Anthropic released Claude Fable 5. By Thursday, the US government ordered it shut down. In between, developers got a glimpse of something genuinely different — and then it was gone. I want to talk about what Fable 5 actually was, why the 72 hours mattered, and what this means for everyone building with AI right now. What Made Fable 5 Different Let me skip the marketing language and go straight to the numbers. SWE-Bench Pro (real software engineering tasks across open-source codeb...