Anthropic outage — August 13, 2026

Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5

Anthropic’s Claude.ai was disrupted for 2h 01m on August 13, 2026.

Key facts

Timeline

1. 14:38Z

   Detected · Official

   Reported directly on ANTHROPIC's official status page — no earlier independent (crowd / dependency / measurement) signal.
2. 16:39Z

   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.