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Anthropic cut off access to its Fable 5 and Mythos 5 AI models following a government export control directive citing national security concerns, blocking all foreign nationals and even internal employees. The company complied but criticized the lack of specific evidence, stating the alleged vulnerabilities were minor and available in other models like GPT-5.5.
Anthropic disables its Claude Fable 5 and Mythos 5 AI models after receiving a US government export control directive citing national security concerns, escalating tensions between the company and the Trump administration.