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Claude Code incident

Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1

Resolved after 17 min.

Started
Ended
Worst state
Partial outage
On Claude Code’s status page
Source
Components
Claude API (api.anthropic.com), Claude Code, Claude Cowork, claude.ai

Live Claude Code status Full Claude Code outage history

Timeline

  1. Claude Code status page · Reported Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1
  2. Claude Code status page · Investigating We are investigating elevated errors on requests to Claude Fable 5.1 and Claude Mythos 5.1. We will provide an update as soon as possible.
  3. Claude Code status page · Identified We have identified the cause of elevated errors on requests to Claude Mythos 5.1 and Claude Fable 5.1 and are working on a fix. We will provide an update as soon as possible.
  4. Claude Code status page · Monitoring A fix has been deployed for Claude Mythos 5.1 and Claude Fable 5.1 and we are monitoring for recovery.
  5. Claude Code status page · Monitoring A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.
  6. Claude Code status page · Resolved The issue affecting Claude services has been resolved. Impact occurred from 13:57 to 14:20 UTC

Cite this incident

Site Qwality, “Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1,” Sep 11, 2026, https://siteqwality.com/is-claude-code-down/incidents/claude-code-202609111419/

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