Anthropic incident

Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5

Major Resolved View vendor source →

Anthropic experienced a major incident on August 13, 2026 affecting claude.ai and Claude API (api.anthropic.com) and 1 more component, lasting 1h 34m. The incident has been resolved; the full update timeline is below.

Started
Aug 13, 2026, 02:33 PM UTC
Resolved
Aug 13, 2026, 04:08 PM UTC
Duration
1h 34m
Detected by Pingoru
Aug 13, 2026, 02:33 PM UTC

Affected components

claude.aiClaude API (api.anthropic.com)Claude CodeClaude Cowork

Update timeline

  1. investigating Aug 13, 2026, 02:33 PM UTC

    We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5. We will provide an update as soon as possible.

  2. investigating Aug 13, 2026, 03:44 PM UTC

    We are investigating elevated errors on requests to Claude Mythos 5 and Claude Fable 5. We will provide an update as soon as possible.

  3. resolved Aug 13, 2026, 04:08 PM UTC

    The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved.