GlobalOutageMap
← Live dashboard
Anthropic logoAnthropic

Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1

ResolvedmajorOfficial source confirmedSpecific component onlyFirst recorded update Oct 5, 2026, 01:05 PM · Resolved Oct 5, 2026, 01:21 PM

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.

Anthropic live status →

What visitors reported during this incident

No visitor reports were filed for this incident.

Having problems with Anthropic now? Check the current status

Affected services

Claude Coworkclaude.aiClaude CodeClaude API (api.anthropic.com)

Updates (2)

  1. Oct 5, 2026, 01:21 PM
    Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1

    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.

    Anthropic ↗
  2. Oct 5, 2026, 01:05 PM
    Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1

    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.

    Anthropic ↗

What to do next

  • Verify your own services recovered cleanly. Some upstream outages leave queues or caches in a degraded state, run smoke tests before declaring green internally.
  • Save the post-mortem. Vendors usually publish a detailed RCA 1-3 days later. We'll add it to this page when it appears.
  • Watch the provider going forward. Follow Anthropic's status feed →

GlobalOutageMap aggregates publicly reported signals. We never claim authoritative status, always cross-check the provider's official channel before making business decisions.