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The tweet announces that Claude Fable 5.1 and Mythos 5.1 are the same underlying AI model with different safeguard levels, with Fable 5.1 available via API, AWS, GCP, and Azure, while Mythos 5.1 is restricted to vetted US organizations.
The Trump administration is drafting new rules to restrict Chinese AI labs' remote access to overseas AI chips, addressing gaps in US export controls and imposing stricter screening requirements on data centers.