Claude Status – Elevated errors for multiple models
Recorded: Sept. 22, 2026, 2:51 a.m.
| Original | Summarized |
Claude Status - Elevated errors for multiple models Elevated errors for multiple models Incident Report for Claude Resolved This issue has been resolved. Impact occurred from 5:50pm PT / 00:50 UTC to 7:10pm PT / 02:10 UTC. Posted Sep 22, 2026 - 02:35 UTC Monitoring We have seen success rates return to normal across affected models, and are monitoring closely to ensure no further issues. Posted Sep 22, 2026 - 02:11 UTC Update We are continuing to work to resolve errors affecting some models. At this time, requests to Claude Fable 5 and 5.1 and Mythos 5 and 5.1 have returned to normal success rates. We are working to resolve remaining errors affecting Claude Opus 5, and will provide an additional update shortly. Posted Sep 22, 2026 - 01:35 UTC 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. Posted Sep 22, 2026 - 01:17 UTC 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. Posted Sep 22, 2026 - 00:57 UTC This incident affected: claude.ai, Claude API (api.anthropic.com), Claude Code, and Claude Cowork. ← Current Status × Subscribe to updates for Elevated errors for multiple models via email and/or text message. You'll receive email notifications when incidents are updated, and text message notifications whenever Claude creates or resolves an incident. VIA EMAIL: VIA SMS: Afghanistan (+93) Enter mobile number Edit number Enter the OTP sent Resend OTP To receive SMS updates, please verify your number. To proceed with just email click ‘Subscribe’ Subscribe to Incident Message and data rates may apply. By subscribing you agree to our Privacy Policy, the Atlassian Terms of Service, and the Atlassian Privacy Policy. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. |
An incident was reported concerning elevated errors affecting multiple models within the Claude system, which impacted services including claude.ai, the Claude API (api.anthropic.com), Claude Code, and Claude Cowork. The period of impact was documented as occurring between 5:50pm PT / 00:50 UTC and 7:10pm PT / 02:10 UTC. Throughout the incident, the operational status was monitored closely, and subsequent updates indicated that success rates for the affected models were successfully restored to normal levels. The investigation revealed that the elevated errors originated from issues pertaining to specific models, namely Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5. The team actively investigated the cause of these failures and worked to implement a fix. As of the latest updates, requests to Claude Fable 5 and 5.1, along with Claude Mythos 5 and 5.1, have successfully returned to normal operational success rates. However, efforts are still underway to resolve the remaining errors specifically affecting Claude Opus 5, and further updates regarding this specific model are forthcoming. The resolution process involved identifying the root cause for the errors across these affected models and implementing corrective measures. |