Anthropic experienced a minor incident on June 16, 2026 affecting claude.ai and Claude API (api.anthropic.com) and 1 more component, lasting 2h 2m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jun 16, 2026, 05:29 PM UTC
We are currently investigating this issue.
- monitoring Jun 16, 2026, 06:00 PM UTC
A fix has been implemented and we are monitoring the results.
- identified Jun 16, 2026, 06:15 PM UTC
We are still seeing errors on Opus 4.8 and Haiku 4.5.
- identified Jun 16, 2026, 07:00 PM UTC
We are continuing to work to resolve an elevated rate of errors on requests to Claude Opus 4.8, and will provide an additional update as soon as possible.
- identified Jun 16, 2026, 07:08 PM UTC
We are continuing to work on a fix for this issue.
- monitoring Jun 16, 2026, 07:22 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Jun 16, 2026, 07:32 PM UTC
The incident has now been resolved. We had two phases: * between 10:23 PT / 17:23 UTC to 11:00 PT / 18:00 UTC -- all Sonnet and Opus models were affected, reaching an error rate of around 10% * after 11:00 PT / 18:00 UTC and until 12:20 PT / 19:20 UTC -- Opus 4.8 had an average error rate of 10% The incident is now resolved.