Increased processing times and errors for Universal-3.5 Pro on the EU async endpoint

Summary

Increased processing times and errors for Universal-3.5 Pro on the EU async endpoint

This incident has been resolved. Between approximately 08:20 and 10:45 UTC, asynchronous transcription requests using Universal-3 Pro and Universal-3.5 Pro on our EU endpoint took longer than usual to complete, and some requests failed. Processing times have returned to normal ranges. Any requests that failed during this window can be safely resubmitted.

• Started

  Oct 5, 2026 · 10:21 AM

• Resolved

  Oct 5, 2026 · 11:39 AM

• Duration

  1h 18m

• Severity

  Major

• ◐

  Investigating

  Oct 5 · 10:21 AM AssemblyAI

  We have identified an issue affecting asynchronous transcription requests using Universal-3.5 Pro on our EU endpoint. Most of these requests are currently significantly delayed, and some have failed. Our team is working to restore normal processing. Our US endpoint and real-time services are not affected. We will continue to provide updates as more information becomes available.

• ◆

  Identified

  Oct 5 · 10:38 AM AssemblyAI

  We have identified the issue causing longer-than-usual processing times and some failed requests for asynchronous transcription using our Universal-3 Pro and Universal-3.5 Pro models on the EU endpoint. We are working to resolve this as quickly as possible and will provide further updates as soon as we can.

• ◉

  Monitoring

  Oct 5 · 10:43 AM AssemblyAI

  We have continued to work to resolve this issue and are now seeing processing times return to the normal ranges, but we are continuing to monitor to ensure good performance.

• ✓

  Resolved

  Oct 5 · 11:39 AM AssemblyAI

  This incident has been resolved. Between approximately 08:20 and 10:45 UTC, asynchronous transcription requests using Universal-3 Pro and Universal-3.5 Pro on our EU endpoint took longer than usual to complete, and some requests failed. Processing times have returned to normal ranges. Any requests that failed during this window can be safely resubmitted.