Elevated errors on Claude 4 Sonnet

Incident Report for Anthropic

Resolved

We've seen two big spikes of errors, one between 13:05 UTC and 13:24 UTC, and another one between 13:50 UTC and 14:18 UTC. The issue has now been resolved.

Posted Jul 23, 2025 - 14:43 UTC

Identified

The issue has been identified and a fix is being implemented.

Posted Jul 23, 2025 - 13:26 UTC

Investigating

We are investigating an issue on Claude 4 Sonnet that started at 6:04 PT / 13:04 UTC.

Posted Jul 23, 2025 - 13:20 UTC

This incident affected: claude.ai, console.anthropic.com, api.anthropic.com, and Claude Code.