Elevated errors and delays for Universal-3 Pro, Universal-3.5 Pro and Universal-3.6 Pro
AssemblyAI reports elevated errors and delays for pre-recorded transcription requests that use Universal-3 Pro, Universal-3.5 Pro and Universal-3.6 Pro in all regions. The Asynchronous API is affected. Streaming is not affected. AssemblyAI reports that error rates and processing times are back to normal, and it is monitoring for stable performance.
State
Monitoring
Started
1 h ago
2026-11-02 21:42 UTC
Ongoing for
1 h 11 min
Worst impact
Degraded
Timeline
4 updatesIdentified
1 h 5 min 92%
Monitoring
6 min 8%
Updates
Times in UTCAs posted by AssemblyAI
Error rates and processing times have returned to normal. We're monitoring to make sure performance remains stable.
We've applied a fix and error rates have dropped significantly. Some pre-recorded requests using Universal-3 Pro, Universal-3.5 Pro and Universal-3.6 Pro may still take longer than usual to complete while we work through the backlog.
Error rates are decreasing as our rollback progresses, and we're continuing to work on fully resolving the issue. Some requests may still fail or take longer than usual to complete.
We've identified an issue causing a significant portion of pre-recorded transcription requests using Universal-3.5 Pro and Universal-3.6 Pro to fail or take longer than usual to complete, across all regions. Streaming is not affected. We've identified the cause and are rolling back a recent change, and we're beginning to see recovery.
Affected components
2AssemblyAI in the last 90 days
Full historyIncidents in 90 days
13
Days with an incident
11
Median duration
28 min
This incident
2.5× the median
Other AssemblyAI incidents
All incidentsAssemblyAI·Real-time STT: 502 errors related to change to temporary tokens
We have continued to see good performance after the rollback and are now marking this issue as resolved.
AssemblyAI·Increased Processing Times and Errors on EU Endpoint for Universal-3 Pro Async model
This incident has been resolved. Between approximately 15:05 and 15:45 UTC, async transcription requests using Universal-3 Pro on our EU endpoint took longer than usual to complete, and some requests failed. Processing times have returned to normal ranges and any requests that failed during this window can be safely resubmitted.
AssemblyAI·Increased Processing Times and Errors on US Endpoint for Universal-3.5 Pro Async model
This incident has been resolved. Between approximately 1:35p and 2:20p UTC, async transcription requests using Universal-3.5 Pro on our US endpoint took longer than usual to complete, and some requests failed. Processing times have returned to normal ranges and any requests that failed during this window can be safely resubmitted.
AssemblyAI·Rejected Sessions on US Endpoint for Universal-3.6 Pro Realtime Model
From 10:30a - 12:30a UTC users experienced rejected connections when connecting to our Realtime Universal-3.6 Pro model on our US endpoint. Users received a 3005 Session Cancelled error message on connection. This issue has been resolved and the Realtime US endpoint for Universal-3.6 Pro is functioning normally. The EU Realtime endpoint was not affected.
AssemblyAI·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.
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