Elevated errors for Claude Opus 5.5

Anthropic resolved an incident of elevated errors on requests to Claude Opus 5.5 on Oct 06, 2026, roughly 19 minutes after first acknowledging the problem. The company opened an investigation at 12:24 UTC, identified the cause at 12:37 UTC, and reported the fix at 12:43 UTC. The incident affected claude.ai, the Claude API (api.anthropic.com), Claude Code, and Claude Cowork.

The issue affecting Claude Opus 5.5 has been resolved. Posted Oct 06, 2026 - 12:43 UTC Identified We have identified the cause of elevated errors on requests to Claude Opus 5.5 and are working on a fix. We will provide an update as soon as possible. Posted Oct 06, 2026 - 12:37 UTC Investigating We are investigating elevated errors on requests to Claude Opus 5.5. We will provide an update as soon as possible. Posted Oct 06, 2026 - 12:24 UTC This incident affected: claude.ai, Claude API api.anthropic.com , Claude Code, and Claude Cowork. Subscribe to updates for Elevated errors for Claude Opus 5.5 via email and/or text message. You'll receive email notifications when incidents are updated, and text message notifications whenever Claude creates or resolves an incident.