Amazon CEO Andy Jassy was among tech leaders who raised concerns to senior Trump administration officials this week about security risks in Anthropic’s most advanced AI models, a person familiar has said.
Jassy’s involvement sheds light on the extraordinary move by Anthropic on Friday to shut down its latest models globally in response to national security orders from the Donald Trump administration.
The San Francisco-based AI start-up, which has filed for a US initial public offering, had previously warned about the hacking capabilities of its Mythos model and held it back from wide release, but earlier this week Anthropic rolled out a public version, called Fable, with what it described as cybersecurity safeguards.
That brief release ended on Friday. In a blog post, Anthropic said the US government told the company it believes there is a method of bypassing, or “jailbreaking”, a safeguard against using the model to find cybersecurity holes.
The bypass found only “minor” security flaws that other publicly available models can also find, Anthropic said in its blog post.
The Trump administration ordered Anthropic to block any foreign nationals, whether inside or outside the US, from using both its latest models, Fable 5 and Mythos 5, the company said. In response, Anthropic said it would disable access to the models globally.
Amazon did not confirm whether it spoke to government officials about Anthropic’s models.
Export control
“As a leading cloud provider that serves a large number of private and public sector customers, it’s not uncommon for governments to seek our counsel on potential security risks,” an Amazon spokesman said. “When they occur, we don’t share the details of these discussions.”
The US government restrictions came in the form of an export control, Anthropic said in its blog post. The US commerce department’s Bureau of Industry and Security, which oversees export controls, did not immediately respond to a request for comment.
Read: The Mythos hacking threat is looking overblown
Some experts who favour export controls on advanced AI models found the Trump administration’s action puzzling because it affects allied nations as well as adversaries.
“This was not well thought out,” said Jimmy Goodrich, a senior fellow at the University of California’s Institute for Global Conflict and Cooperation. “It even bans Canadians and Brits employed at Anthropic from doing research and development.”
The order came just as a previous dispute between Trump administration officials and Anthropic showed signs of easing across parts of the US government. — Abu Sultan, Stephen Nellis and Greg Bensinger, (c) 2026 Reuters
