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Degraded performance for Claude Fable 5

ResolvedminorOfficial source confirmedSpecific component onlySource start Oct 21, 2026, 07:49 PM · Resolved Oct 21, 2026, 08:29 PM

Performance issues affecting Claude Fable 5 have been resolved.

Anthropic live status →

What visitors reported during this incident

No visitor reports were filed for this incident.

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Affected services

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

Updates (2)

  1. Oct 21, 2026, 08:29 PM
    Degraded performance for Claude Fable 5

    The issue affecting other Claude models has been resolved.

    Anthropic ↗
  2. Oct 21, 2026, 07:49 PM
    Degraded performance for Claude Fable 5

    We are investigating elevated errors on requests to Claude Fable 5. 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 →

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