Anthropic stops access to Mythos 5/Fable 5 due to US export rules

Anthropic says it has stopped access to the Mythos 5/Fable 5 model for all foreign citizens, including employees with foreign nationality, following a US government export control order. Other models are not affected.

Anthropic says it follows the government's request but disagrees with the decision. The US government only mentioned a few minor "jailbreak attack cases" verbally. The company believes the government should have the power to control dangerous AI, but the process should be based on transparent legal procedures and fair review, which this action lacks.