Elevated errors across many models

Timeline

Started: 2026-06-16T17:29:52.477Z

Updated: 2026-06-16T19:32:23.776Z

Resolved: 2026-06-16T19:32:23.759Z

Impact scope

Official sources

Provider: anthropic

Updates

• resolved

  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.

  2026-06-16T19:32:23.759Z

• monitoring

  A fix has been implemented and we are monitoring the results.

  2026-06-16T19:22:38.906Z

• identified

  We are continuing to work on a fix for this issue.

  2026-06-16T19:08:55.072Z

• identified

  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.

  2026-06-16T19:00:17.978Z

• identified

  We are still seeing errors on Opus 4.8 and Haiku 4.5.

  2026-06-16T18:15:46.872Z

• monitoring

  A fix has been implemented and we are monitoring the results.

  2026-06-16T18:00:12.045Z

• investigating

  We are currently investigating this issue.

  2026-06-16T17:29:52.619Z