Anthropic restores AI models Fable, Mythos after the U.S. lifts export controls
SummaryAnthropic is restoring access to its Claude Fable 5 and Claude Mythos 5 AI models after U.S. export controls that forced a June suspension were lifted at the end of the month.Fable 5 is returning globally on July 1, while Mythos 5, a less restricted variant of the same underlying model, is being reintroduced only to approved U.S. organizations following government review.The episode, triggered by an Amazon-discovered jailbreak that let Fable 5 generate exploit code, has spurred closer collaboration between Anthropic and U.S. agencies on model testing, threat sharing and standards for rating jailbreak risks. Anthropic is restoring access to its two most advanced AI models after the U.S. government lifted the export controls that forced it to pull them last month. The controls on Claude Fable 5 and Claude Mythos 5 were removed on June 30, the company said. Fable 5 returns globally on July 1 across Anthropics platforms, while Mythos 5, which shares the same underlying model but carries fewer safety restrictions, is being restored to a set of U.S. organizations after government approval on June 26. The freeze dated to June 12, when the government applied export controls, rules that limit which foreign nationals can access a technology, to both









