Anthropic incident

Claude Sonnet 4.5 error spike

Major Resolved View vendor source →

Anthropic experienced a major incident on April 20, 2026 affecting claude.ai and Claude Console (platform.claude.com) and 1 more component, lasting 1h 11m. The incident has been resolved; the full update timeline is below.

Started
Apr 20, 2026, 06:14 AM UTC
Resolved
Apr 20, 2026, 07:25 AM UTC
Duration
1h 11m
Detected by Pingoru
Apr 20, 2026, 06:14 AM UTC

Affected components

claude.aiClaude Console (platform.claude.com)Claude API (api.anthropic.com)Claude CodeClaude CoworkClaude for Government

Update timeline

  1. investigating Apr 20, 2026, 06:14 AM UTC

    We are currently investigating this issue.

  2. monitoring Apr 20, 2026, 06:38 AM UTC

    A fix has been implemented and we are monitoring the results.

  3. monitoring Apr 20, 2026, 06:41 AM UTC

    We are continuing to monitor for any further issues.

  4. resolved Apr 20, 2026, 07:25 AM UTC

    This incident has been resolved.