Provider
AnthropicIncident detail
Elevated errors for Claude Sonnet 5.5 and other models
Resolved incidentMajor3 affected services
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Timeline
Incident updates
Every update on the official status source, oldest to newest, exactly as it appeared there.
Investigating
We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5. We will provide an update as soon as possible.
Identified
We have identified the cause of elevated errors on requests to Claude Sonnet 5.5 and are working on a fix. We will provide an update as soon as possible.
Monitoring
A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.
Resolved
The issue affecting Claude services has been resolved. Impact occurred from 23:05 PT on October 24 / 06:05 UTC on October 25 to 23:35 PT on October 24 / 06:35 UTC on October 25.
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More from Anthropic
Neighboring incidents on Anthropic's timeline and the rest of their record on OutageDeck.