Intermittent error spikes for Claude Mythos 5.1 and Claude Fable 5.1
A fix has been deployed for Claude Mythos 5.1 and Claude Fable 5.1 and we are monitoring to ensure it has resolved the issue.
- Incident ID
- #292dc81d
- Impact
- major
- Components
- anthropic
Updates
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investigating Sep 15, 2026, 5:48 PM GMT+08:00
We are investigating elevated errors on requests to Claude Mythos 5.1 and Claude Fable 5.1. We will provide an update as soon as possible.
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investigating Sep 15, 2026, 5:52 PM GMT+08:00
We are investigating elevated errors on requests to Claude Mythos 5.1 and Claude Fable 5.1. We will provide an update as soon as possible.
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monitoring Sep 15, 2026, 6:50 PM GMT+08:00
A fix has been deployed for Claude Mythos 5.1 and Claude Fable 5.1 and we are monitoring to ensure it has resolved the issue.
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resolved Sep 15, 2026, 7:14 PM GMT+08:00
A fix has been deployed for Claude Mythos 5.1 and Claude Fable 5.1 and we are monitoring to ensure it has resolved the issue.