By Stephen Nellis

June 13 (Reuters) – 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 with the matter told Reuters.

Amazon did not immediately respond to a ​request for comment.

Citing national security concerns, the Trump administration on Friday directed Anthropic to block any foreign nationals, whether inside or outside the U.S., from using its latest models, Fable 5 and Mythos 5. In response, Anthropic ‌said it would disable access ⁠to the models globally.

In a blog post, Anthropic said on Friday that the U.S. government believes there is ⁠a method of bypassing, or “jailbreaking,” a safeguard that would prevent Fable 5 from being used in identifying software vulnerabilities, the company said.

The U.S. government restrictions ​came ​in the form of an export ​control, Anthropic said in its ‌blog post. The U.S. Commerce Department’s Bureau of Industry and Security, which oversees export controls, did not immediately respond to a request for comment.

Some experts who favor 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, which has confidentially filed for a U.S. initial public offering, showed ​signs of easing across ‌parts of the U.S. government.

(Reporting by Abu Sultan in Bengaluru, ​and Stephen Nellis and Greg Bensinger in San Francisco; Editing ​by Sergio Non and Matthew Lewis)