Claude 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 Claude'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.

• Cursor: Degraded Performance for Anthropic ModelsCritical · May 18, 2026, 22:00 UTC
• Confluent Cloud: Elevated error rates and latency on produce and consume operations on AWS us-east-1 AZ4Major · May 8, 2026, 01:14 UTC
• Linode: [DirtyFrag] Linux Privilege Escalation VulnerabilityMinor · May 8, 2026, 13:40 UTC
• Linode: [Fragnesia] Linux Privilege Escalation VulnerabilityMinor · May 13, 2026, 21:02 UTC
• 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 Claude have incidents?

Claude reported 84 incidents in the last 90 days, 32 of them major or critical. A typical incident lasted 1h 6m. See Claude's uptime and incident history