Elevated errors across many models

Summary

Elevated errors across many models

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.

• Started

  Jun 16, 2026 · 5:29 PM

• Resolved

  Jun 16, 2026 · 7:32 PM

• Duration

  2h 2m

• Severity

  Minor

• ◐

  Investigating

  Jun 16 · 5:29 PM Claude

  We are currently investigating this issue.

• ◉

  Monitoring

  Jun 16 · 6:00 PM Claude

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

• ◆

  Identified

  Jun 16 · 6:15 PM Claude

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

• ◆

  Identified

  Jun 16 · 7:00 PM Claude

  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 · 7:08 PM Claude

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

• ◉

  Monitoring

  Jun 16 · 7:22 PM Claude

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

• ✓

  Resolved

  Jun 16 · 7:32 PM Claude

  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.