Anthropic blocks all public access to Claude Fable 5, Mythos 5 following US government order — what enterprises should do

The US government ordered Anthropic to suspend foreign national access to Claude Fable 5 and Mythos 5, prompting Anthropic to block global access and route queries to older models. Anthropic says the order may be based on a poorly documented, non-universal jailbreak report and warns it could chill future frontier model deployments.