AssemblyAI API · Endpoint removal
summary_model on POST /v2/transcript stops working
Stopped working
Calls to POST /v2/transcript, body parameter summary_model on AssemblyAI API stopped working on October 20, 2026.
What to use instead of these calls
Move the options into speech_understanding.request (Summarization under Speech Understanding) and read results from speech_understanding.response.
Calls it hits
POST /v2/transcriptbody parameter summary_model
The legacy Summarization model (the top-level summarization boolean and summary_model parameter) and the legacy Auto Chapters model are deprecated. Starting October 20, 2026, requests using them will return errors.
Facts
- API
- AssemblyAI API
api.assemblyai.com - Kind
- Endpoint removal
- Announced
- October 6, 2026
- Takes effect
- October 20, 2026
- Calls after that day
- Fail
- Source
- Announcement
- Last updated
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- speech_model on POST /v2/transcript is deprecated Deprecated, no date