Claude outage: Elevated errors for Claude Sonnet 5

Affected components

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

1. resolvedSep 3, 2026, 12:56 UTC

   This incident has been resolved.

2. monitoringSep 3, 2026, 12:47 UTC

   A fix has been implemented and we are monitoring the results.

3. investigatingSep 3, 2026, 12:37 UTC

   We are investigating elevated errors on requests to Claude Sonnet 5. We will provide an update as soon as possible.

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.

• Elasticsearch: Replication bug causing slow recoveriesMajor · Sep 1, 2026, 08:16 UTC
• Grafana Cloud: High Latency in prod-ap-south-1Major · Sep 3, 2026, 09:32 UTC
• OVHcloud: [GLOBAL][Databases] - MongoDB incident notificationMajor · Sep 3, 2026, 10:18 UTC
• Twilio: SMS Delivery Receipt Delays from a Subset of Twilio Phone Numbers to Telefonica El SalvadorMinor · Aug 21, 2026, 21:20 UTC
• Twilio: MMS Delivery Delays from a Subset of Twilio Long Codes to C-Spire United StatesMinor · Aug 26, 2026, 14:48 UTC
• OVHcloud: [EU-SOUTH-MIL][Containers & Orchestration] - Managed Private Registry incident notificationMinor · Aug 26, 2026, 15:00 UTC
• Snowflake: INC20000150Minor · Aug 28, 2026, 00:07 UTC
• Twilio: SMS Delivery Delays from a Subset of Twilio Short Codes to C-Spire and Dish United StatesMinor · Aug 31, 2026, 20:30 UTC
• Twilio: SMS Delivery Delays from Twilio Long Codes to Multiple Networks in NetherlandsMinor · Sep 1, 2026, 11:08 UTC
• Twilio: SMS Delivery Receipt Delays from Twilio to Three United KingdomMinor · Sep 2, 2026, 11:58 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