Anthropic experienced a major incident on July 16, 2026 affecting claude.ai and Claude API (api.anthropic.com) and 1 more component, lasting 4h 16m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.