Claude incident: Elevated errors on Claude Opus 5

Affected components

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

1. resolvedJul 27, 2026, 09:05 UTC

   As of 2:03 PST / 9:03 UTC the errors have returned to baseline.

2. investigatingJul 27, 2026, 08:16 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.

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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