503RADARINCIDENT ARCHIVEMETHODOLOGY
RESOLVED

Anthropic outage — July 27, 2026

Elevated errors on Claude Opus 5

Anthropic’s Claude.ai was disrupted for 56m on July 27, 2026.

Key facts

DetectedJuly 27, 2026 · 08:18 UTC
Confirmed08:18 UTC
Resolved09:14 UTC
Duration56m
ServiceClaude.ai
Official recordhttps://stspg.io/l73709q1jfd8

Timeline

  1. 08:18Z

    Detected · Official

    Reported directly on ANTHROPIC's official status page — no earlier independent (crowd / dependency / measurement) signal.
  2. 09:14Z

    Resolved

    Signal volume fell back below the threshold; the event was closed.

How this was detected

Confirmed by ANTHROPIC's official status page — no independent (crowd / dependency / measurement) corroboration.