Changes / AssemblyAI / EU endpoint session failures on Universal 3.5 Pro Realtime

AssemblyAI: Major incident: EU endpoint session failures on Universal 3.5 Pro Realtime

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 from the diff below (Sol; type: incident outage). Check the diff before relying on it.

Major incidentLabel: outage (model (Jev), 100%)Changed Detected Source: stspg.io

What changed

AddedTitle#1
Before: not present
After: EU endpoint session failures on Universal 3.5 Pro Realtime
AddedImpact#2
Before: not present
After: major
AddedStatus#3
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After: resolved
AddedStart time#4
Before: not present
After: 2026-08-19 13:17 UTC
AddedResolved time#5
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After: 2026-08-19 13:24 UTC
AddedAffected components#6
Before: not present
After: APIs - Streaming API, Streaming API
AddedUpdateinvestigating#7
Before: not present
After: 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.
AddedUpdateidentified#8
Before: not present
After: The issue has been identified and a fix is being implemented.
AddedUpdatemonitoring#9
Before: not present
After: A fix has been implemented and our team is monitoring the results. Users can now create new realtime sessions successfully.
AddedUpdatemonitoring#10
Before: not present
After: We are continuing to monitor for any further issues.
AddedUpdateresolved#11
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After: 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.

First version of this incident archived by Rewindex. View the live incident.

History of this incident

When (UTC)ChangeKind
Major incident: EU endpoint session failures on Universal 3.5 Pro Realtime (this change)
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.
Major incident

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