Major incident

AssemblyAI: EU endpoint session failures on Universal 3.5 Pro Realtime

Affected: Streaming API

Current status of AssemblyAI: Operational — live AssemblyAI status

Timeline

1. Aug 19, 2026, 13:17 UTC
   investigating
   We're currently investigating an issue affecting users on our Universal 3.5 Pro Realtime model, where new streaming sessions could not be created on our EU endpoint. This occurred from 13:00–13:12 UTC. Affected users are seeing a 3005 close code. Users on the US endpoint are unaffected.
2. Aug 19, 2026, 13:17 UTC
   identified
   The issue has been identified and a fix is being implemented.
3. Aug 19, 2026, 13:18 UTC
   monitoring
   A fix has been implemented and our team is monitoring the results. Users can now create new realtime sessions successfully.
4. Aug 19, 2026, 13:20 UTC
   monitoring
   We are continuing to monitor for any further issues.
5. Aug 19, 2026, 13:24 UTC
   resolved
   This incident has been resolved. From 13:00–13:12 UTC, users creating new streaming sessions using the EU endpoint were receiving a 3005 close code.

Updates as published by AssemblyAI (original).