Elevated 529 errors on Sonnet 4

Incident Report for Claude

Resolved

This incident has been resolved.
Posted Jul 25, 2025 - 00:57 UTC

Monitoring

A fix has been implemented and we are monitoring the results.
Posted Jul 25, 2025 - 00:45 UTC

Investigating

We are currently investigating this issue.
Posted Jul 25, 2025 - 00:19 UTC

Update

We are currently investigating this issue.
Posted Jul 25, 2025 - 00:17 UTC

Identified

We are currently investigating this issue.
Posted Jul 25, 2025 - 00:16 UTC
This incident affected: claude.ai, Claude Console (platform.claude.com), Claude API (api.anthropic.com), and Claude Code.