Anthropic incident: Degraded performance on Claude Sonnet 5

Affected components

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

1. resolvedAug 3, 2026, 15:29 UTC

   As of 15:20 UTC (8:20am PT), error rates on Claude Sonnet 5 have returned to baseline. This incident is resolved.

2. investigatingAug 3, 2026, 15:13 UTC

   We are currently investigating this issue.

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.

• Snowflake: INC20000129Critical · Aug 3, 2026, 14:11 UTC
• OVHcloud: [GLOBAL][Data & Analytics] - Data Platform Incident NotificationMajor · Aug 3, 2026, 14:14 UTC
• Supabase: Management API Performance DegradationMinor · Jul 31, 2026, 18:36 UTC
• Tailscale: Certificate creation issuesMinor · Aug 3, 2026, 08:39 UTC
• DigitalOcean: Cloud Control Panel AccessMinor · Aug 3, 2026, 13:58 UTC
• Intercom: Inbox experience degraded performanceMinor · Aug 3, 2026, 14:22 UTC
• Supabase: Project Upgrade DelaysMinor · Aug 3, 2026, 15:28 UTC

How often does Anthropic have incidents?

Anthropic reported 47 incidents in the last 90 days, 21 of them major or critical. A typical incident lasted 1h 4m. See Anthropic's uptime and incident history