Elevated error rates on Opus 4.5

Incident Report for Claude

Resolved

This incident has been resolved.
Posted Dec 21, 2025 - 14:34 UTC

Monitoring

A fix has been implemented and we are monitoring the results.
Posted Dec 21, 2025 - 13:57 UTC

Identified

The issue has been identified and a fix is being implemented.
Posted Dec 21, 2025 - 13:16 UTC
This incident affected: claude.ai, Claude API (api.anthropic.com), and Claude Code.