Incident report · read from Anthropic's status page

Anthropic incident: Elevated errors on Claude Opus 5

Resolved after 1 h 2 m (27 Jul 2026, 11:27–12:30 UTC), impact minor, affecting Claude Cowork, Claude API (api.anthropic.com), claude.ai and Claude Code.

Timeline

1. 27 Jul 2026 at 11:27 UTC investigating

   We are currently investigating this issue.

2. 27 Jul 2026 at 12:30 UTC resolved

   As of 4:47 PST / 11:47 UTC the errors have returned to baseline.

Affected components

• Claude Cowork: degraded for 1 h 2 m
• Claude API (api.anthropic.com): degraded for 1 h 2 m
• claude.ai: degraded for 1 h 2 m
• Claude Code: degraded for 1 h 2 m

Source

Anthropic's own report of this incident, on Anthropic's status page. This page is a record of Anthropic's own report; where the two disagree, theirs is right.

Last checked 8 Sep 2026 at 16:16 UTC.

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