Elevated errors on Opus 4 and Sonnet 3.5 (new)

Incident Report for Claude

Monitoring

A fix has been implemented and we are monitoring the results.
Posted Sep 27, 2025 - 19:57 UTC

Identified

The issue has been identified and a fix is being implemented.
Posted Sep 27, 2025 - 18:24 UTC

Update

We are continuing to investigate this issue.
Posted Sep 27, 2025 - 17:35 UTC

Investigating

We are currently investigating this issue.
Posted Sep 27, 2025 - 17:29 UTC
This incident affects: Claude API (api.anthropic.com).