Anthropic Claude service outage affects U.S. users September 29
Summary
Anthropic's Claude.ai, Claude Code, Claude Cowork and Claude API experienced elevated errors Sept. 29, 2026, affecting U.S. users. Anthropic said services returned to normal by 14:59 UTC and declared the incident resolved at 16:27 UTC. The cause was not identified as a cyberattack.
Key facts
- Added to watchlist
- Sep 30, 2026
- Incident start
- Sep 29, 2026
- Left watchlist
- Oct 1, 2026
Watchlist history
- Added to watchlist
- Left watchlist
resolved