Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5
The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved.
- Incident ID
- #238c2718
- Impact
- major
- Components
- anthropic
Updates
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investigating Aug 13, 2026, 10:33 PM GMT+08:00
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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investigating Aug 13, 2026, 11:44 PM GMT+08:00
We are investigating elevated errors on requests to Claude Mythos 5 and Claude Fable 5. We will provide an update as soon as possible.
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resolved Aug 14, 2026, 12:08 AM GMT+08:00
The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved.