Anthropic Halts Access to Fable 5 and Mythos 5 Under U.S. Export Controls

Anthropic said a U.S. government export-control order will block foreign nationals (inside or outside the U.S., including Anthropic employees) from using its top models Fable 5 and Mythos 5, so it will disable access to those models for everyone to ensure compliance. The company says the concern relates to potential jailbreaking but is not seen as universal, while other Anthropic models remain available. The move comes amid broader AI-safety and national-security tensions and follows earlier government actions and related lawsuits involving Anthropic.