503RADARINCIDENT ARCHIVEMETHODOLOGY
RESOLVED

Anthropic outage — August 19, 2026

Degraded performance for Claude Opus 5 and Claude Haiku 4.5

Anthropic’s Claude.ai was disrupted for 1h 31m on August 19, 2026.

Key facts

DetectedAugust 19, 2026 · 09:53 UTC
Confirmed09:53 UTC
Resolved11:24 UTC
Duration1h 31m
ServiceClaude.ai
Official recordhttps://stspg.io/zg9tfmjj1th2

Timeline

  1. 09:53Z

    Detected · Official

    Reported directly on ANTHROPIC's official status page — no earlier independent (crowd / dependency / measurement) signal.
  2. 11:24Z

    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.