Outage recap · Anthropic

Claude outage — June 21, 2026

On June 21, 2026, Claude had a reported incident on Anthropic's official status page. Below is what was reported — impact, timing, and the AI services the same upstream outage could affect.

Elevated Error Rates for Opus 4.8, Opus 4.7, Opus 4.6, Sonnet 4.6, and Haiku 4.5

major
Started
Jun 21, 8:37 PM EDT
Resolved
Jun 21, 10:06 PM EDT
Duration
1h 30m

As reported by Anthropic's official status page (status: resolved). 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.