Anthropic said the US government issued an export control directive barring any foreign national, inside or outside the country, from accessing its Fable 5 and Mythos 5 models. To comply, Anthropic is disabling both models for all customers, while its other models remain available. Anthropic disputes the basis for the order, saying the cited security bypass produced only minor findings that other public models can also produce, and says it is working to restore access.
What changed
Fable 5 and Mythos 5 were generally available to Anthropic customers.
- directive received 5:21pm ET
- 30-day data retention for Fable
- more details promised in 24 hours
What you need to act on it
- switch to other Anthropic models or another provider
- anthropic.com2026-08-20