Outage in Anthropic
Elevated errors for Claude Sonnet 5.5
Resolved MajorIncident Report
Summary AI Generated
Anthropic experienced elevated error rates affecting Claude Sonnet 5.5 requests across claude.ai and the Anthropic API for approximately 45 minutes. A fix was deployed and the issue was fully resolved within that timeframe.
We are investigating elevated errors on requests to Claude Sonnet 5.5. We will provide an update as soon as possible.
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Latest Updates ( sorted recent to last )
RESOLVED
3 days ago - at 10/27/2026 09:56AM
The issue affecting Claude services has been resolved.
MONITORING
3 days ago - at 10/27/2026 09:38AM
A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.
INVESTIGATING
3 days ago - at 10/27/2026 09:14AM
We are investigating elevated errors on requests to Claude Sonnet 5.5. We will provide an update as soon as possible.
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