Anthropic pulls Fable and Mythos access worldwide after Trump administration bars their use by foreign nationals

Anthropic disabled access to its Claude Fable 5 and Claude Mythos 5 models worldwide after the Trump administration ordered the company to bar foreign nationals from using them, citing national security concerns and a potential jailbreak. The company downplayed the threat and noted other models like OpenAI's GPT-5.5 could be similarly affected, while Amazon CEO Andy Jassy's discussions with officials reportedly prompted the crackdown.

Anthropic pulls Fable and Mythos access worldwide after Trump administration bars their use by foreign nationals Only days after releasing two versions of its next-gen AI model, Anthropic has disabled them for users worldwide. Anthropic says it received a Friday night order from the Trump administration to suspend access to the models for any foreign national anywhere in the world — a group that included some Anthropic employees. In response, the company turned off access to everyone. Last week, the company released https://sherwood.news/tech/anthropics-mythos-gets-tired-hates-bad-users-and-wants-to-be-thanked/ to the public its much-anticipated Claude Fable 5 model and its restricted version Claude Mythos 5, which is still being tested with trusted partners . Anthropic said in a blog post https://www.anthropic.com/news/fable-mythos-access announcing the action that officials cited national security concerns with the new models, while offering few specific details. The post said that the government gave the company “verbal evidence of a potential narrow, non-universal jailbreak” of the public Fable 5 model. A jailbreak is a means by which users can evade restrictions built into the code to unlock prohibited functionality. Anthropic downplayed the significance of the attack, and said other major models, such as OpenAI’s GPT-5.5, could also be affected by the technique described. Fears of these first Mythos-class models being misused are running high, after Anthropic warned the cybersecurity world in May that the advanced cyber capabilities of Mythos have rapidly discovered thousands of vulnerabilities in ubiquitous software, leading to the decision to restrict the full version of the model to a close group of trusted partners https://www.anthropic.com/research/glasswing-initial-update for testing. This morning, Axios reported https://www.axios.com/2026/06/14/anthropic-white-house-mythos-fable that Anthropic technical staff have flown to Washington to meet with White House officials to resolve the issue. The Wall Street Journal is reporting https://www.wsj.com/tech/ai/amazon-ceos-talks-with-u-s-officials-triggered-crackdown-on-anthropic-models-dcc90578?mod=hp lead pos1 that the Trump administration’s decision to take action against Anthropic was prompted by discussions that Amazon https://robinhood.com/us/en/stocks/AMZN/?source=sherwood CEO Andy Jassy had with officials, including Treasury Secretary Scott Bessent. According to the report, Amazon researchers said they had been able to evade some of Fable 5’s security restrictions using specific prompts. Amazon is a major investor in Anthropic. Anthropic is currently suing https://sherwood.news/power/anthropic-sues-the-us-government/ the US government to fight the Pentagon’s blacklisting of the company on national security grounds. Last week, the company released https://sherwood.news/tech/anthropics-mythos-gets-tired-hates-bad-users-and-wants-to-be-thanked/ to the public its much-anticipated Claude Fable 5 model and its restricted version Claude Mythos 5, which is still being tested with trusted partners . Anthropic said in a blog post https://www.anthropic.com/news/fable-mythos-access announcing the action that officials cited national security concerns with the new models, while offering few specific details. The post said that the government gave the company “verbal evidence of a potential narrow, non-universal jailbreak” of the public Fable 5 model. A jailbreak is a means by which users can evade restrictions built into the code to unlock prohibited functionality. Anthropic downplayed the significance of the attack, and said other major models, such as OpenAI’s GPT-5.5, could also be affected by the technique described. Fears of these first Mythos-class models being misused are running high, after Anthropic warned the cybersecurity world in May that the advanced cyber capabilities of Mythos have rapidly discovered thousands of vulnerabilities in ubiquitous software, leading to the decision to restrict the full version of the model to a close group of trusted partners https://www.anthropic.com/research/glasswing-initial-update for testing. This morning, Axios reported https://www.axios.com/2026/06/14/anthropic-white-house-mythos-fable that Anthropic technical staff have flown to Washington to meet with White House officials to resolve the issue. The Wall Street Journal is reporting https://www.wsj.com/tech/ai/amazon-ceos-talks-with-u-s-officials-triggered-crackdown-on-anthropic-models-dcc90578?mod=hp lead pos1 that the Trump administration’s decision to take action against Anthropic was prompted by discussions that Amazon https://robinhood.com/us/en/stocks/AMZN/?source=sherwood CEO Andy Jassy had with officials, including Treasury Secretary Scott Bessent. According to the report, Amazon researchers said they had been able to evade some of Fable 5’s security restrictions using specific prompts. Amazon is a major investor in Anthropic. Anthropic is currently suing https://sherwood.news/power/anthropic-sues-the-us-government/ the US government to fight the Pentagon’s blacklisting of the company on national security grounds.