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Anthropic · AIAug 13, 2026, 14:33 UTC 2 months ago

Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5

MajorNot disclosedUpdated 47d ago
Aug 13, 14:33 UTCAug 13, 16:08 UTC
Duration
1h 35m
Impact
Major
Root cause
Not disclosed
Anthropic, 90 days
49 incidents
Affected
claude.aiClaude API (api.anthropic.com)Claude CodeClaude Cowork
Status page

Final update

The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved.

Timeline

  1. Resolved · Aug 13, 16:08 UTC
    The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved.
  2. Investigating · Aug 13, 15:44 UTC
    We are investigating elevated errors on requests to Claude Mythos 5 and Claude Fable 5. We will provide an update as soon as possible.
  3. Investigating · Aug 13, 14:33 UTC
    We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5. We will provide an update as soon as possible.

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