The Commerce Department barred foreign nationals from using Fable and Mythos, including AnthropicAn AI safety company — creators of the Claude family of language models.'s own non-citizen staff. With no way to filter users by nationality in real time, AnthropicAn AI safety company — creators of the Claude family of language models. pulled both models globally. Washington cited a reported Fable 5 jailbreak; AnthropicAn AI safety company — creators of the Claude family of language models. disputed the severity. Access was restored July 1 after controls were lifted.

The first export-control shutdown of a deployed commercial frontier AI model.

It proved governments could block frontier models post-launch, not just restrict chips.