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

The US government issued an export control directive ordering Anthropic to suspend access to Claude Fable 5 and Claude Mythos 5 for foreign nationals due to national security concerns and potential jailbreak techniques. Consequently, Anthropic blocked all global public access, affecting all users, including employees and paying enterprise customers. This action occurs three days after the models' release. Current sessions will error out, and new queries are now automatically routed to older, less capable models.