AssemblyAI outage, 16 September 2026

Outage on US Async Endpoint

Started
Resolved
16 Sept 2026, 21:37 UTC (after 1 h 14 min)
Impact
Critical
Affected
Asynchronous API

Last update from AssemblyAI

**Summary** On September 16, 2026, between 20:04 and 21:08 UTC, our US Async API returned elevated server errors. At peak, roughly 50% of async transcription requests on the US endpoint failed, and a portion of the requests that did succeed took longer than usual to complete. Our EU endpoint and real-time/streaming services were not affected. **Root cause** The failure originated in AWS SQS, the managed queuing service our transcription pipeline uses to distribute work. Specifically, the Fair Queues feature began rejecting valid messages with an `InvalidParameterValue` error on a parameter our services had been sending successfully for months. There was no deploy or infrastructure change...

21 Sept 2026, 20:38 UTC

Read the full incident on the official AssemblyAI status page

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Other AssemblyAI incidents

  1. Increased Processing Times and Errors on EU Endpoint for Universal-3 Pro Async model

  2. Increased Processing Times and Errors on US Endpoint for Universal-3.5 Pro Async model

  3. Rejected Sessions on US Endpoint for Universal-3.6 Pro Realtime Model

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

  5. Increased turnaround times for Async Universal-3 model

  6. Elevated turnaround times for async transcription

  7. Increased latency for Universal 3.5 Pro Realtime model

  8. Async Transcription Service Issues

All recorded AssemblyAI incidents