AssemblyAI API · Endpoint removal
auto_chapters on POST /v2/transcript stops working
Stopped working
Calls to POST /v2/transcript, body parameter auto_chapters on AssemblyAI API stopped working on October 20, 2026.
What to use instead of these calls
Use Summarization under Speech Understanding, which returns headlined chapters with timestamps.
Calls it hits
POST /v2/transcriptbody parameter auto_chapters
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
More from AssemblyAI API
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- POST /lemur/v3/generate/action-items stops working Stopped working
- speech_model on POST /v2/transcript is deprecated Deprecated, no date