After weeks of negotiating with the Trump administration, Anthropic announced it is finally going to bring Claude Fable 5 back online. The company posted on X that it has received notice that the Department of Commerce has lifted export controls on Claude Fable 5 and Mythos 5. Anthropic plans to begin restoring access on Wednesday, July 1, to users globally on Claude platforms, and will re-enable access on AWS, Google Cloud, and Microsoft Foundry soon, though no set timeline was given. In a detailed blog post, Anthropic outlined the lead-up to the events, its revised safeguards, new AI industry processes it's working on, and plans for prerelease testing for upcoming models. The export control directive had been triggered in early June after Amazon researchers flagged a jailbreak, leading the government to slap Anthropic with an export control that disallowed any foreign national from using either Mythos 5 or Fable 5. To address the jailbreak, Anthropic said it had "trained an improved safety classifier that targets and blocks" that behavior, adding that users will be notified if a request to Fable 5 is blocked, and the request will instead be sent to Opus 4.8. The company also pledged to work with the US government on protocols and standards for Mythos, Fable, and future models, and to proactively detect and address security risks.
Anthropic's long-sidelined Fable 5 is greenlit to return
updated at June 30, 2026