Anthropic incident

Elevated errors for multiple models

Resolved after 4 hours 16 minutes, affecting claude.ai and Claude API (api.anthropic.com) and 1 more, on July 16, 2026.

resolved Jul 16, 2026, 10:53 PM UTC

This issue has been resolved. From 11:30am PT / 18:30 UTC through to 3:15pm PT / 22:15 UTC some users experienced elevated errors on requests to Claude Models. Most errors were experienced within the first hour of the impact window.

Started
Jul 16, 2026, 06:36 PM UTC
Resolved
Jul 16, 2026, 10:53 PM UTC
Duration
4h 16m
Detected by Pingoru
Jul 16, 2026, 06:36 PM UTC

Affected components

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

Update timeline

  1. investigating Jul 16, 2026, 06:36 PM UTC

    We are investigating elevated errors on requests to multiple models. We will provide an update as soon as possible.

  2. identified Jul 16, 2026, 07:14 PM UTC

    We have identified the cause of elevated errors on requests to multiple models, and are working to resolve this issue. We will provide an update as soon as possible.

  3. identified Jul 16, 2026, 08:07 PM UTC

    We are continuing to work to resolve issues resulting in elevated errors on requests to some Anthropic models. We will provide additional updates as soon as possible.

  4. identified Jul 16, 2026, 08:58 PM UTC

    At this time, we are seeing recovery on requests to most models. We are continuing to see elevated errors on requests to Claude Fable 5 and Mythos 5, and are working to resolve these remaining issues. We will provide an additional update as soon as possible.

  5. monitoring Jul 16, 2026, 10:01 PM UTC

    We have seen success rates recover and are continuing to monitor closely to ensure no further issues. We will provide an additional update shortly.

  6. resolved Jul 16, 2026, 10:53 PM UTC

    This issue has been resolved. From 11:30am PT / 18:30 UTC through to 3:15pm PT / 22:15 UTC some users experienced elevated errors on requests to Claude Models. Most errors were experienced within the first hour of the impact window.

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