Incident

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

This incident has been resolved.

resolved
Incident ID
#03220b9b
Impact
major
Components
anthropic

Updates

  1. investigating Jul 26, 2026, 2:40 AM GMT+08:00

    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.

  2. identified Jul 26, 2026, 2:44 AM GMT+08:00

    The issue has been identified and a fix is being implemented.

  3. resolved Jul 26, 2026, 3:44 AM GMT+08:00

    This incident has been resolved.

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