Anthropic incident

Elevated error rates on Claude Opus and Sonnet 4.6

Major Resolved View vendor source →

Anthropic experienced a major incident on March 21, 2026 affecting claude.ai and Claude Console (platform.claude.com) and 1 more component, lasting 1h 35m. The incident has been resolved; the full update timeline is below.

Started
Mar 21, 2026, 12:07 AM UTC
Resolved
Mar 21, 2026, 01:42 AM UTC
Duration
1h 35m
Detected by Pingoru
Mar 21, 2026, 12:07 AM UTC

Affected components

claude.aiClaude Console (platform.claude.com)Claude API (api.anthropic.com)Claude Code

Update timeline

  1. investigating Mar 21, 2026, 12:07 AM UTC

    We are currently investigating elevated error rates affecting Claude Opus 4.6. Our team is actively working to identify the root cause.

  2. identified Mar 21, 2026, 12:17 AM UTC

    We have identified an issue resulting in elevated errors on both Claude Opus and Sonnet 4.6, and are working to resolve this issue as quickly as possible.

  3. identified Mar 21, 2026, 12:58 AM UTC

    We have observed success rates return to normal for Claude Opus 4.6, and are working to fully resolve elevated errors for Claude Sonnet 4.6.

  4. resolved Mar 21, 2026, 01:42 AM UTC

    This incident has been resolved.