Anthropic was directed by the Trump administration to immediately suspend all access to its two most advanced AI models, Fable 5 and Mythos 5, citing national security concerns.
The directive issued on 12 June ordered the AI lab to disable both models for all customers globally, including foreign national Anthropic employees, whether inside or outside the US.
The Trump administration’s letter to Anthropic targeted foreign nationals, but because ensuring compliance would require verifying the nationality of every user, it shut both models down entirely for all customers, Anthropic stated in a blog.
The letter did not specify the nature of its national security concern, but Anthropic said its understanding is goverment officials believe a method of bypassing the model’s safeguards through jailbreaking has been identified.
The AI player stated it reviewed a demonstration of the technique and found it exposed only a small number of previously known minor vulnerabilities, all of which can be replicated using other publicly available AI models without any bypass required.
Anthropic pushed back on the administration’s justification for the suspension. The company noted in the weeks building up to Fable 5’s launch, it worked extensively with the US government, the UK AI Safety Institute and multiple private organisations.
Those tests, Anthropic said, showed Fable 5’s protections were substantially stronger than any previously deployed model. No tester has yet found a universal jailbreak capable of broadly bypassing the model’s defences, according to Anthropic.
It did acknowledge perfect jailbreak resistance is not currently achievable for any AI model provider and stated it disclosed this limitation publicly at launch.
Anthropic adopted what it describes as a defence in depth strategy, combining narrow jailbreak resistance with thorough monitoring and a 30-day customer data retention policy specifically designed to detect and shut down successful attacks.
Amazon angle
The Wall Street Journal (WSJ) reported the directive followed conversations between Amazon CEO Andy Jassy and US officials including Treasury Secretary Scott Bessent, after the retail giant’s researchers used a series of prompts to extract information from Fable 5 which were restricted.
Anthropic said it is complying with the legal order but disagrees the narrow potential jailbreak warrants recalling a model deployed to hundreds of millions of users. The company warned that applying this standard across the industry would effectively halt all new frontier model deployments.
Forbes reported some customers are seeking refunds from Anthropic for the disabling of Fable 5, citing a post on Reddit from the company which offers a prorated refund.
Anthropic apologised for the disruption, describing the situation as a misunderstanding, and said it is working to restore access as soon as possible.
AI policy shifts
Kevin Frazier, adjunct research fellow at the Cato Institute, said the episode exposes a deeper structural problem. The decision, he said, based on questionable justifications and made by actors subject to few effective constraints, strengthens the case for Congress to pass a transparent and technically grounded AI governance framework.
“Transparency, fairness, clarity, and evidence-driven enforcement should be core components of AI governance,” he said. “So long as AI policy decisions are driven by a few actors taking action behind closed doors in response to non-public reports, we will be far short of that standard.”
The Trump administration previously took a hands-off approach to AI regulations to spur development and stay ahead of China.
Earlier this month, Trump signed an executive order directing pre-deployment testing of frontier AI models, but the order was voluntary and did not create a licensing requirement.
In March 2026, the administration released its national AI legislative framework, a move aimed to create uniform security and safety guardrails while also attempting to pre-empt states from enacting their own rules.
Anthropic is currently on a Department of War blacklist designating the company as supply chain risk and barring it from government use. A federal judge blocked the order for the federal government to cut all contracts with Anthropic. The legal battle is ongoing.
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