# AssemblyAI: EU endpoint session failures on Universal 3.5 Pro Realtime

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-08-19 13:17 UTC · Resolved: 2026-08-19 13:24 UTC · Duration: 7 min
- Updates: 5 · Affected components: APIs - Streaming API, Streaming API
- [Vendor status page: https://stspg.io/3ddx3qgldw63](https://stspg.io/3ddx3qgldw63)
- [Company: AssemblyAI](https://rewindex.com/company/assemblyai.md)

## Summary

AssemblyAI reported a major Universal 3.5 Pro Realtime outage: EU endpoint users could not create streaming sessions and received code 3005 during 13:00–13:12 UTC; US users were unaffected. The incident started at 2026-08-19 13:17 UTC and resolved at 2026-08-19 13:24 UTC (7 min), after a fix restored session creation. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2026-08-19 13:17 UTC: 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.
- **identified** 2026-08-19 13:17 UTC: The issue has been identified and a fix is being implemented.
- **monitoring** 2026-08-19 13:18 UTC: A fix has been implemented and our team is monitoring the results. Users can now create new realtime sessions successfully.
- **monitoring** 2026-08-19 13:20 UTC: We are continuing to monitor for any further issues.
- **resolved** 2026-08-19 13:24 UTC: 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.

## Rewindex changes for this incident

- 2026-08-19 13:17 UTC: [Major incident: EU endpoint session failures on Universal 3.5 Pro Realtime](https://rewindex.com/change/i9c6e33f7dd7dda.md)


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Canonical: https://rewindex.com/company/assemblyai/incidents/fr5tc2kc9lr3 · Markdown: https://rewindex.com/company/assemblyai/incidents/fr5tc2kc9lr3.md · JSON: https://rewindex.com/api/v1/companies/assemblyai/incidents/fr5tc2kc9lr3 · Generated 2026-10-18T10:33:23.587Z