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Anthropic · AIJul 25, 2026, 18:40 UTC

Elevated errors for Mythos 5, Fable 5, Opus 5 and Claude Haiku 4.5

MajorNot disclosedUpdated 18h ago
Jul 25, 18:40 UTCJul 25, 19:44 UTC
Duration
1h 4m
Impact
Major
Root cause
Not disclosed
Anthropic, 90 days
94 incidents
Affected
claude.aiClaude API (api.anthropic.com)Claude CodeClaude Cowork
Status page

Final update

This incident has been resolved.

Timeline

  1. Resolved · Jul 25, 19:44 UTC
    This incident has been resolved.
  2. Identified · Jul 25, 18:44 UTC
    The issue has been identified and a fix is being implemented.
  3. Investigating · Jul 25, 18:40 UTC
    We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, and Claude Haiku 4.5. We will provide an update as soon as possible.

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Full history

From vendors' own status pages and disclosures. Times as reported. Logos via logo.dev; trademarks belong to their owners.

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