GoKawiilAnthropic announced late Tuesday that access to its most advanced AI models, Claude Mythos 5 and Claude Fable 5, would be restored globally on Wednesday, with the US government signing off.
Anthropic reiterated in its statement that Fable 5 had industry-leading cybersecurity safeguards. It also calls for consistent standards for model evaluation and proposes one framework as part of its cybersecurity Project Glasswing.
In June, Anthropic released Fable 5, the first of its Mythos-level models to be made publicly available. It was only available for a week before the government issued an export control order, commanding Anthropic to block access by any foreign national. Anthropic said the only way to comply was to pull the model for everyone.
"Although we have reached a constructive resolution, these events have made clear that the industry needs a consistent way to assess and fix potential 'jailbreaks' of AI models," the company said. "A shared standard... would help AI developers triage new findings as they arise, launch highly capable models with greater safety, and communicate the level of risk consistently to government and industry partners."
As of 9 a.m. ET on Wednesday, CNET couldn't independently confirm the availability of Fable 5. Access to the model will likely be rolling throughout the day. You can use the new Sonnet 5 model, also released on Tuesday.
We’ve received notice that the Department of Commerce has lifted export controls on Claude Fable 5 and Mythos 5.
We'll begin restoring access tomorrow, and will share an update soon.
We’re grateful to our users for their patience, and to everyone who worked with us on… — Anthropic (@AnthropicAI) June 30, 2026
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