ÉVIAN-LES-BAINS, France — The Trump administration won’t allow G7 member countries to regain access to Anthropic’s most advanced AI models after the US imposed a ban last week over national security concerns, sources told The Post. UK Prime Minister Keir Starmer requested a “carve-out” for British nationals and companies to Anthropic’s cutting edge “Mythos” and “Fable” AI models after the US on Friday announced export controls that barred its use by anybody outside the US or foreign nationals. B...