Claude outage: Elevated errors for multiple models

Affected components

• Claude API (api.anthropic.com)
• Claude Code
• Claude Cowork
• claude.ai

1. resolvedSep 22, 2026, 02:35 UTC

   This issue has been resolved. Impact occurred from 5:50pm PT / 00:50 UTC to 7:10pm PT / 02:10 UTC.

2. monitoringSep 22, 2026, 02:11 UTC

   We have seen success rates return to normal across affected models, and are monitoring closely to ensure no further issues.

3. identifiedSep 22, 2026, 01:35 UTC

   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.

4. identifiedSep 22, 2026, 01:17 UTC

   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.

5. investigatingSep 22, 2026, 00:57 UTC

   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.

What APIStatus.watch saw

• Sep 22, 2026, 01:01 UTCoperational → degraded
• Sep 22, 2026, 02:15 UTCdegraded → operational

Other services with incidents at the same time

Overlapping incidents aren't necessarily related.

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• Expo: Elevated rate of failed iOS submissionsMajor · Sep 21, 2026, 21:18 UTC
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• Twilio: SMS Delivery Delays from Twilio to Telemat Cel BrazilMinor · Sep 20, 2026, 22:28 UTC
• Twilio: Voice Call Post Dial Delay from Twilio Phone Numbers to Jazz PakistanMinor · Sep 21, 2026, 06:10 UTC
• Twilio: Voice Call Failures from Network Subscribers to a Subset of Twilio Israel Phone NumbersMinor · Sep 21, 2026, 09:51 UTC
• Linode: Emerging Service Issue - Cloud Manager and APIMinor · Sep 21, 2026, 17:13 UTC

How often does Claude have incidents?

Claude reported 85 incidents in the last 90 days, 32 of them major or critical. A typical incident lasted 1h 7m. See Claude's uptime and incident history