Anthropic released a special version of its Mythos AI model — called Fable 5 — earlier this week, making some of the advanced capabilities of its tightly controlled Mythos system available to a wider audience. Days later, the US government ordered the AI company to suspend access to both Fable 5 and Mythos 5 in countries other than US, citing national security concerns.

Mythos has already shown what it can do when it is not heavily restricted. Since April, when an earlier preview was sent to about 150 organizations under...

Anthropic said it received a government directive banning all foreign nationals, even those working at Anthropic, from accessing Fable 5 and Mythos 5 over national security…