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Outage in Anthropic

Elevated errors on Claude Opus 5

Resolved Minor
July 27, 2026 - Started 5 days ago - Lasted about 1 hour
Official incident page

Incident Report

Summary AI Generated

Anthropic experienced elevated errors on Claude Opus 5 affecting both claude.ai and api.anthropic.com for approximately 1.1 hours on July 27, 2026. The issue was investigated and resolved by 11:47 UTC, when error rates returned to baseline.

We are currently investigating this issue.

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Latest Updates ( sorted recent to last )
RESOLVED 5 days ago - at 07/27/2026 12:30PM

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

INVESTIGATING 5 days ago - at 07/27/2026 11:27AM

We are currently investigating this issue.

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