Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1
A record of the Anthropic incident on October 5, 2026 (UTC): start time, duration and severity, plus current status, what to do, and alternatives.
Other providers down at the same time
No other provider we monitor recorded an incident during this window. This appears to have been specific to Anthropic.
Derived from our own archive of official status pages across 13 providers. Items lasting more than 24 hours and unresolved items are excluded, as they would misrepresent the moment.
How big was this outage?
This outage lasted 16 minutes. Across 60 major incidents recorded for Anthropic, the median duration is 87 minutes, making this the 57th longest.
Shorter than a typical outage.
Only incidents recorded as major-or-worse and already resolved are counted.
Current status
Anthropic is operating normally now. This incident has been resolved.
See current Anthropic status →What you can do during an outage
Source: Anthropic's official status page.
Other Anthropic incidents
- Delayed credits on the Claude PlatformOctober 1, 2026
- Elevated errors on claude.ai, Claude Code, Claude Cowork and the Claude APISeptember 29, 2026
- Elevated errors for multiple modelsSeptember 22, 2026
- Issues with Google Play subscriptionsSeptember 16, 2026
- Intermittent error spikes for Claude Mythos 5.1 and Claude Fable 5.1September 15, 2026