Anthropic incident
Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1
Major Vendor's status page →
Resolved after 15 minutes, affecting claude.ai and Claude API (api.anthropic.com) and 1 more, on October 5, 2026.
The issue affecting Claude Mythos 5.1 and Claude Fable 5.1 has been resolved. Impact occurred from 05:40 PT / 12:40 UTC to 06:10 PT / 13:10 UTC.
Affected components
claude.aiClaude API (api.anthropic.com)Claude CodeClaude Cowork
Update timeline
- investigating Oct 05, 2026, 01:05 PM UTC
We are investigating elevated errors on requests to Claude Mythos 5.1 and Claude Fable 5.1. We will provide an update as soon as possible.
- resolved Oct 05, 2026, 01:21 PM UTC
The issue affecting Claude Mythos 5.1 and Claude Fable 5.1 has been resolved. Impact occurred from 05:40 PT / 12:40 UTC to 06:10 PT / 13:10 UTC.
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