minorArchivedAnthropicv5.1

Anthropic: Elevated errors for multiple models

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

Executive summary

Elevated error rates have been observed for requests to OpenAI's Claude Mythos 5.1 model, affecting multiple users and services. The issue is being addressed by the team.

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 report2 months ago
Elevated errors for multiple models(opens official status page in a new tab)
Investigating: We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5. We will provide an update as soon as possible. Identified: We have identified the cause of elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 and are working on a fix. We will provide an update as soon as possible. Update: We are continuing to work to resolve errors affecting some models. At this time, requests to Claude Fable 5 and 5.1…
by anthropic status

Timeline

First report on status pageSep 22, 02:35 UTC
Elevated errors for multiple models
Source
Official statementSep 22, 02:35 UTC
Investigating: We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5.
Source
Status changedSep 22, 02:35 UTC
Status changed: new → archived (resolved more than 14 days ago).