Claude incident: Degraded performance on Claude Sonnet 5

Affected components

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

1. resolvedJul 31, 2026, 07:04 UTC

   This incident has been resolved.

2. investigatingJul 31, 2026, 06:18 UTC

   We are currently investigating this issue.

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.

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• Twilio: SMS Delivery Delays and Failures from Twilio to Unitel AngolaMinor · Jul 29, 2026, 22:49 UTC
• Twilio: SMS Delivery Delays from Twilio to Africell AngolaMinor · Jul 30, 2026, 22:31 UTC
• Twilio: Voice Call Failures and Post Dial Delay from Twilio Phone Numbers to BrazilMinor · Jul 30, 2026, 23:22 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