What changed?
The company said it could not immediately verify users’ nationality, so it paused both models for everyone.
Why it matters
Teams depending on these releases needed a fallback during the interruption.
What this does not establish
This records Anthropic’s reported service interruption. It does not measure model capability.
The access history
Fable 5 and Mythos 5 were announced, with different access conditions.
Access to both models was suspended.
Anthropic reported that the export controls were lifted.
The company confirmed access had resumed. Mythos remained restricted.
Original sources
Provider notices checked Oct 7, 2026. These dates track availability, not a scientific result or a change in benchmark scores.
Anthropic access notice Anthropic redeployment update Model announcement history