Not the first time (remember PGP?) and probably no the last.

https://thenextweb.com/news/who-decides-who-gets-to-use-a-piece-of-software

Who decides who gets to use a piece of software?

… The directive told Anthropic to deny access to Fable 5 and Mythos 5 to any foreign national, anywhere on Earth, including non-citizens sitting at desks in California. There is no clean way to enforce a rule like that on a live product, so the company did the only thing the order left it room to do. It pulled the plug on both models for everyone, citizen and foreigner alike, and apologised for a disruption it had not chosen.

(Related)

https://thenextweb.com/news/anthropic-curbs-make-the-case-for-sovereign-ai-upstage-chief-says

Anthropic curbs make the case for sovereign AI, Upstage chief says

When the US government ordered Anthropic to cut foreign access to its most capable models, and the company switched them off worldwide rather than try to comply selectively, it handed every advocate of home-grown AI a tidy piece of evidence. Sung Kim, chief executive of the South Korean startup Upstage, picked it up at a briefing in Seoul on Tuesday.

“AI is no longer just a service or a tool we use; it has become a strategic national asset,” Kim told reporters, according to Bloomberg. The countries that control the foundational technology, he argued, the United States and China, can withdraw access whenever it suits them.