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Claude incident

Elevated errors for Claude Sonnet 5.5 and other models

Resolved after 1 h 39 min.

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

Live Claude status Full Claude outage history

Timeline

  1. Claude status page · Reported Elevated errors for Claude Sonnet 5.5 and other models
  2. Claude status page · Investigating We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5. We will provide an update as soon as possible.
  3. Claude status page · Identified We have identified the cause of elevated errors on requests to Claude Sonnet 5.5 and are working on a fix. We will provide an update as soon as possible.
  4. Claude status page · Monitoring A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.
  5. Claude status page · Resolved The issue affecting Claude services has been resolved. Impact occurred from 23:05 PT on October 24 / 06:05 UTC on October 25 to 23:35 PT on October 24 / 06:35 UTC on October 25.

Cite this incident

Site Qwality, “Elevated errors for Claude Sonnet 5.5 and other models,” Oct 25, 2026, https://siteqwality.com/is-claude-down/incidents/claude-202610250614/

Free to quote with a link to this page.