<div dir="ltr">Explore this gift article from The New York Times. You can read it for free without a subscription.<br><br>U.S. Bars Foreigners From Using Anthropic’s Most Advanced A.I. Models<br><br>The company said on Friday night that the federal government had ordered limits on its Mythos and Fable 5 A.I. systems, citing national security concerns.<br><br><a href="https://www.nytimes.com/2026/06/12/technology/anthropic-mythos-fable5-blocked.html?unlocked_article_code=1.p1A.qK3j.QSTJ-wimQQl7&smid=em-share">https://www.nytimes.com/2026/06/12/technology/anthropic-mythos-fable5-blocked.html?unlocked_article_code=1.p1A.qK3j.QSTJ-wimQQl7&smid=em-share</a></div>