Resolved
The incident has now been resolved. We had two phases: The incident is now resolved.
* 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%
Posted Jun 16, 2026 - 19:32 UTC
Monitoring
A fix has been implemented and we are monitoring the results.
Posted Jun 16, 2026 - 19:22 UTC
Update
We are continuing to work on a fix for this issue.
Posted Jun 16, 2026 - 19:08 UTC
Update
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.
Posted Jun 16, 2026 - 19:00 UTC
Identified
We are still seeing errors on Opus 4.8 and Haiku 4.5.
Posted Jun 16, 2026 - 18:15 UTC
Monitoring
A fix has been implemented and we are monitoring the results.
Posted Jun 16, 2026 - 18:00 UTC
Investigating
We are currently investigating this issue.
Posted Jun 16, 2026 - 17:29 UTC
This incident affected: claude.ai, Claude API (api.anthropic.com), Claude Code, and Claude Cowork.