minorArchivedAnthropic

Anthropic: Elevated errors for Claude Opus 5.5

Investigating(done)
Trending(skipped)
Workaround available(skipped)
Resolved(done)
Archived

Executive summary

Elevated error rates have been observed for requests to Claude Opus 5.5, affecting users since October 23 at 17:23 PT / 00:23 UTC until October 24 at 17:34 PT / 00:34 UTC. The issue has now been resolved.

No verified workaround yet

This incident was resolved upstream without a reported workaround.

Technical root cause

Under active investigation. No report has identified a root cause yet.

Evidence

1 report · 1 StatusShow

[1]
Status First report15 days ago
Elevated errors for Claude Opus 5.5(opens official status page in a new tab)
Investigating: We are investigating elevated errors on requests to Claude Opus 5.5. We will provide an update as soon as possible. Resolved: The issue affecting Claude Opus 5.5 has been resolved. Impact occurred from 17:23 PT on October 23 / 00:23 UTC on October 24 to 17:34 PT on October 23 / 00:34 UTC on October 24.
by anthropic status

Timeline

First report on status pageOct 24, 00:37 UTC
Elevated errors for Claude Opus 5.5
Source
Official statementOct 24, 00:37 UTC
Investigating: We are investigating elevated errors on requests to Claude Opus 5.5.
Source
Status changedOct 24, 00:37 UTC
Status changed: new → resolved (official status page reports resolution).
Status changedNov 7, 00:40 UTC
Status changed: resolved → archived (resolved more than 14 days ago).