Elevated errors on Claude 4 Sonnet

Incident Report for Anthropic

Resolved

As of 08:52 UTC we have full recovery for the Claude 4 Sonnet model
Posted Jul 21, 2025 - 08:57 UTC

Monitoring

A fix has been implemented and we are monitoring the results.
Posted Jul 21, 2025 - 08:44 UTC

Identified

The issue has been identified and a fix is being implemented.
Posted Jul 21, 2025 - 08:13 UTC

Update

We are continuing to investigate this issue.
Posted Jul 21, 2025 - 07:23 UTC

Investigating

We are currently investigating an issue with Claude 4 Sonnet that started at 6:15 UTC.
Posted Jul 21, 2025 - 07:12 UTC
This incident affected: claude.ai, console.anthropic.com, api.anthropic.com, and Claude Code.