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The US government lifted export restrictions on Anthropic’s most powerful artificial intelligence models, Claude Fable 5 and Mythos 5, according to a company announcement on Tuesday.
Anthropic posted the update on X, confirming that the Department of Commerce removed the previous trade controls and that global access restoration would begin the following day.
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
The regulatory reversal changes a policy from earlier this month, when United States authorities blocked access to the advanced models on national security grounds.
The government intervened after discovering vulnerabilities in the safeguards designed to prevent misuse of the software.
Just days before the total lifting of the ban, the government had merely authorised a small group of American cybersecurity firms to access Mythos 5.
According to a June 26 letter obtained by Politico, Secretary of Commerce Howard Lutnick noted that Anthropic had worked closely with the government to mitigate risks associated with the models.
Washington’s strict oversight extends across the AI sector, forcing rival lab OpenAI to similarly restrict the release of its powerful new model, GPT-5.6, to a limited set of approved partners.
OpenAI CEO Sam Altman publicly criticised the current regulatory environment on Friday, posting on X that the company does not consider this restricted rollout process optimal.
The administration’s hardline approach aligns with severe security warnings from top intelligence officials.
Earlier on Tuesday, CIA Director John Ratcliffe defended the strict technology controls during a speech at the AWS summit in Washington.
Ratcliffe underscored the immense risk of frontier AI systems, comparing the capabilities of the most advanced models to digital nuclear weapons.
