Anthropic's Fable 5 AI model wowed users for a week before government export restrictions ended it
Anthropic released Fable 5, its first publicly available Mythos-class AI model, on June 9. The model demonstrated remarkable capabilities in autonomous programming, debugging complex systems, and handling long-running complex tasks without human intervention. Within a week, the U.S. government restricted access over national security concerns, and Anthropic disabled it worldwide. Users now seek alternatives through combinations like Opus 4.8 with agent loops.