Anthropic outage: Elevated errors for Claude Opus 4.7

1. resolvedMay 18, 2026, 22:19 UTC

   The issue affecting Claude services has been resolved. Impact occurred from 21:47 to 22:18 UTC.

What APIStatus.watch saw

Our 5-minute checks didn't record a change in Anthropic's overall status around this incident. Smaller or regional incidents often leave a provider's overall status green.

Other services with incidents at the same time

Overlapping incidents aren't necessarily related.

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• Twilio: SMS Delivery Failures between Twilio Phone Numbers and AT&T in MexicoMinor · May 14, 2026, 20:50 UTC
• Twilio: Subset of AU Sender ID Registration Submissions Directly Transitioning to REJECTEDMinor · May 15, 2026, 20:51 UTC
• Snyk: Service Degradation on US-01 (app.snyk.io)Minor · May 18, 2026, 12:12 UTC
• ClickHouse Cloud: GCP us-east1 capacity constraints impacting cluster operationsMinor · May 18, 2026, 12:31 UTC
• Twilio: Delay in Getting Twilio/flows Templates Approved on WhatsappMinor · May 18, 2026, 18:42 UTC
• Twilio: SMS Delivery Failures between Twilio Phone Numbers and Multiple Networks in BrazilMinor · May 18, 2026, 20:36 UTC

How often does Anthropic have incidents?

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