Elevated errors on Claude Sonnet 4.0

Incident Report for Anthropic

Resolved

This incident has been resolved.
Posted Sep 10, 2025 - 09:25 UTC

Monitoring

A fix has been implemented and we are monitoring the results.
Posted Sep 10, 2025 - 09:14 UTC

Identified

The issue has been identified and a fix is being implemented.
Posted Sep 10, 2025 - 08:18 UTC

Investigating

We are investigating an issue with Claude Sonnet 4.0 that started at 23:53 PT / 6:53 UTC
Posted Sep 10, 2025 - 07:32 UTC
This incident affected: claude.ai, console.anthropic.com, and api.anthropic.com.