Elevated errors for the Claude 4 Sonnet model

Incident Report for Anthropic

Resolved

This incident has been resolved.
Posted Jun 17, 2025 - 08:55 UTC

Monitoring

A fix has been implemented and we are monitoring the results.
Posted Jun 17, 2025 - 08:49 UTC

Investigating

Since 06:50 UTC we've seen an elevated error rate for the Claude 4 Sonnet model.
Posted Jun 17, 2025 - 08:13 UTC
This incident affected: claude.ai, console.anthropic.com, api.anthropic.com, and Claude Code.