Anthropic Blocked Its Own AI, Then Reversed Course: What Really Happened With Fable 5 and Mythos 5
For eighteen days this summer, one of the most advanced AI models in the world quietly stopped existing for almost everyone who could use it. Not because it broke. Not because Anthropic pulled it for a redesign. The U.S. government ordered it shut off, and Anthropic had about an hour's notice before it happened. If you only caught the headlines, you probably have half the story — "AI model banned," then a few weeks later "AI model un-banned." What actually happened in between is a genuinely interesting case study in how fast AI policy can move, and it says a lot about where this industry is heading next. I've spent the last few days digging through Anthropic's own statements, court filings, and reporting from outlets that had access to the government letters, so let's actually walk through it. The quick version Anthropic launched two new AI models, Claude Fable 5 and Claude Mythos 5, in early June. They share the same underlying model — Mythos ...