Anthropic shuts down access to AI models after US government ban on foreign nationals

Anthropic disabled its two newest AI models, Claude Fable 5 and Claude Mythos 5, three days after launch following a US Commerce Department directive banning foreign nationals from using them. The company cited impracticality in enforcing selective access, marking a shift in US export controls from hardware to AI software. The move impacts enterprise customers and cloud providers globally, raising concerns about AI regulation and investor implications.