Outage recap · Anthropic

Claude outage — August 13, 2026

On August 13, 2026, Claude had 2 reported incidents on Anthropic's official status page. Below is what was reported — impact, timing, and the AI services the same upstream outage could affect.

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

major
Started
Aug 13, 10:33 AM EDT
Resolved
Duration
not marked resolved

As reported by Anthropic's official status page (status: investigating). We report the vendor's own words, never an inferred cause.

Service disruption on Claude Code on the web and related services

minor
Started
Aug 13, 8:36 PM EDT
Resolved
Duration
not marked resolved

As reported by Anthropic's official status page (status: investigating). We report the vendor's own words, never an inferred cause.

The AI cascade

Claude depends on Anthropic. When that upstream has an incident, it doesn't hit Claude alone — these AI tools share the dependency and can degrade at the same time:

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AIDownCheck is not affiliated with Anthropic. This recap summarizes incidents published on Anthropic's official status page.