Anthropic: our next model is so dangerous we can't release it to the public.
After release: we've disabled the dangerous features. But they really exist, we promise.
Anthropic has released Claude Fable 5, its first Mythos-class AI model available to the public.
Earlier versions were shared only privately with selected partners due to concerns about their advanced capabilities in coding and cybersecurity
Fable 5 brings much of that performance to Pro, Team, Enterprise, and API users while adding strong safety measures.
If users ask about high-risk topics such as offensive cyber operations or biological threats, the system automatically switches those requests to a more restricted model.