Anthropic brings back powerful Claude Fable 5 AI model after U.S. export controls lifted

Anthropic has officially redeployed its advanced Claude Fable 5 model, making the cutting-edge AI available once again to users worldwide following the lifting of U.S. government export controls. The relaunch marks a swift return for what the company describes as its first public Mythos-class model, designed for ambitious, long-horizon tasks in coding, research, and complex knowledge work.Fable 5 is back. pic.twitter.com/9RTGUCcPHy
— Claude (@claudeai) July 1, 2026What Happened and Why It