Elevated errors for Claude Sonnet 5.5 and other models

Summary

Elevated errors for Claude Sonnet 5.5 and other models

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.

• Started

  Oct 25, 2026 · 6:14 AM

• Resolved

  Oct 25, 2026 · 7:53 AM

• Duration

  1h 39m

• Severity

  Major

• ◐

  Investigating

  Oct 25 · 6:14 AM Claude

  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.

• ◆

  Identified

  Oct 25 · 6:27 AM Claude

  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.

• ◉

  Monitoring

  Oct 25 · 6:35 AM Claude

  A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.

• ✓

  Resolved

  Oct 25 · 7:53 AM Claude

  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.