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Anthropic · AIOct 21, 2026, 19:49 UTC yesterday

Degraded performance for Claude Fable 5

MinorNot disclosedUpdated 11h ago
Oct 21, 19:49 UTCOct 21, 20:29 UTC
Duration
40m
Impact
Minor
Root cause
Not disclosed
Anthropic, 90 days
57 incidents
Affected
claude.aiClaude API (api.anthropic.com)Claude CodeClaude Cowork
Status page

Final update

The issue affecting other Claude models has been resolved.

Timeline

  1. Resolved · Oct 21, 20:29 UTC
    The issue affecting other Claude models has been resolved.
  2. Investigating · Oct 21, 19:49 UTC
    We are investigating elevated errors on requests to Claude Fable 5. We will provide an update as soon as possible.

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Full history
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