Elevated errors for Claude Sonnet 5.5 and other models

Timeline

1. 06:14 UTC Claude Code status page · Reported Elevated errors for Claude Sonnet 5.5 and other models
2. 06:14 UTC Claude Code 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. 06:27 UTC Claude Code 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. 06:35 UTC Claude Code status page · Monitoring A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.
5. 07:53 UTC Claude Code 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.