Elevated errors for Claude Sonnet 5.5

Incident Report for Claude

Resolved

The issue affecting claude.ai, the Claude API, Claude Code, and Claude Cowork has been resolved. Impact occurred from 07:42 PT / 14:42 UTC to 08:17 PT / 15:17 UTC.
Posted Oct 27, 2026 - 15:50 UTC

Identified

We are investigating elevated errors on requests to Claude Sonnet 5.5. We will provide an update as soon as possible.
Posted Oct 27, 2026 - 15:09 UTC
This incident affected: claude.ai, Claude API (api.anthropic.com), Claude Code, and Claude Cowork.
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