503RADARINCIDENT ARCHIVEMETHODOLOGY
RESOLVED

Anthropic outage — August 4, 2026

Elevated errors across many models

Anthropic’s Claude.ai was disrupted for 1h 31m on August 4, 2026.

Key facts

DetectedAugust 4, 2026 · 20:53 UTC
Confirmed20:53 UTC
Resolved22:24 UTC
Duration1h 31m
ServiceClaude.ai
Official recordhttps://stspg.io/smnf386prrtx

Timeline

  1. 20:53Z

    Detected · Official

    Reported directly on ANTHROPIC's official status page — no earlier independent (crowd / dependency / measurement) signal.
  2. 22:24Z

    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.