Anthropic Shuts Down Fable and Mythos AI Models Following US Export Controls

Anthropic has completely shut down access to its Mythos 5 and Fable 5 language models after receiving a directive from the US Commerce Department that restricts their use outside of the US. This move follows reports of a "jailbreak" technique circumventing safety measures in these models, prompting concerns about national security implications.

The administration requested a pause on model releases to fortify security systems against such threats before resuming access. Access to other Anthropic models remains unaffected.