US Government Orders Anthropic to Pull Claude Fable, Mythos AI Models

In short

The U.S. authorities ordered Anthropic to droop entry to its two most superior AI fashions, Fable 5 and Mythos 5, citing a nationwide safety concern over a possible jailbreak vulnerability.
Anthropic complied however disputed the discovering, arguing the vulnerability is easy and already replicable utilizing different publicly obtainable fashions like GPT-5.5.
The corporate warned the directive units a harmful precedent that, if utilized industry-wide, may halt all new frontier AI mannequin deployments.

The U.S. authorities issued an emergency export management directive on Friday ordering Anthropic to instantly droop entry to its two strongest synthetic intelligence fashions—Claude Fable 5 and Claude Mythos 5, each released just days earlier—for all overseas nationals, together with the corporate’s personal staff, citing nationwide safety issues.

The directive bars any overseas nationwide from accessing the fashions, whether or not inside or outdoors the US. The sweeping scope of the order pressured Anthropic to disable the fashions for its complete buyer base to make sure compliance.

The letter didn’t present particular particulars of its nationwide safety concern, however the authorities believes it has turn out to be conscious of a technique of bypassing, or “jailbreaking,” the publicly obtainable Fable 5 mannequin. Mythos 5, which has fewer guardrails and is especially highly effective at discovering cybersecurity exploits, was solely obtainable to pick out companions.

Anthropic disputed the severity of the discovering. The corporate mentioned it reviewed an illustration of the approach and concluded that the vulnerabilities recognized seem comparatively easy, and that different publicly obtainable fashions are capable of uncover them as nicely with out requiring any bypass.

The corporate mentioned the federal government has to date supplied solely verbal proof of a possible slender, non-universal jailbreak—basically consisting of asking the mannequin to learn a particular codebase and repair any software program flaws. Anthropic added that it validated that the extent of functionality on show is already broadly obtainable from competing fashions, together with OpenAI’s GPT-5.5.

Whereas complying with the directive, Anthropic mentioned it believes the motion units a harmful precedent. “If this normal was utilized throughout the {industry},” the corporate wrote, “we consider it could basically halt all new mannequin deployments for all frontier mannequin suppliers.”

Entry to all different Anthropic fashions won’t be affected. The corporate mentioned it’s working to revive entry as quickly as doable.

I’ve had various conversations with of us inside and out of doors authorities in regards to the present scenario with Anthropic, and here’s what I consider to be true:

— As we all know, Anthropic publicly launched its Mythos class fashions earlier this week underneath the industrial title Fable.…

— David Sacks (@DavidSacks) June 13, 2026

On Saturday, David Sacks—the co-chair of the President’s Council of Advisers on Science and Expertise—wrote on X that “a extremely credible, trusted accomplice of each Anthropic and the U.S. authorities who was testing Fable got here ahead with a jailbreak of these guardrails. The admin requested [Anthropic CEO Dario Amodei] to repair the jailbreak or de-deploy the mannequin. Dario refused.”

Sacks additional claimed that Anthropic’s response to the federal government’s request ran counter to the corporate’s personal public claims concerning the necessity for AI security and regulation—a perspective that Amodei once more shared this week in a weblog publish.

“Anthropic prioritized the continued providing of the patron mannequin over security,” Sacks wrote. “In response, the admin issued the export management. The admin did this reluctantly. It’s been very stunned that Anthropic hasn’t wished to cooperate with an affordable security request (i.e. fixing the jailbreak challenge). Anthropic’s response could be very a lot at odds with their branding and ethos as a secure AI analysis neighborhood.”

Sacks added that the administration hopes that Anthropic will repair the problem and that Fable 5 can return to public launch.

“The admin values Anthropic’s technical capabilities and feels that this challenge, whereas severe, must be simply resolved,” he wrote. “The ball is in Anthropic’s court docket.”

Earlier this yr, Anthropic and the U.S. authorities butted heads when the AI agency refused to signal an expanded settlement permitting for mass home surveillance of People and absolutely autonomous deadly weapons methods.

President Donald Trump slammed the company after talks broke down, and the Division of Protection labeled Anthropic a “provide chain threat”—a designation that the agency has challenged in court. Since then, there have been experiences that the standoff between the 2 sides has cooled as the federal government sought use of Claude Mythos and different fashions.