AssemblyAI API
summarization body parameter removal on POST /v2/transcript
Stopped workingSubscribe to AssemblyAI APIShare
On October 20, 2026, AssemblyAI API removed the legacy summarization feature. Requests to POST /v2/transcript using the body parameter summarization fail and return errors since that date. The legacy summarization model and top-level boolean parameters are no longer supported.
Calls it hits
POST /v2/transcriptbody parameter summarization
What to use instead of these calls
Use Summarization under Speech Understanding (speech_understanding.request.summarization) instead.
In AssemblyAI API's words
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
- Parameter removal
- Announced
- October 6, 2026
- Takes effect
- October 20, 2026
- Calls after that day
- Fail
- Source
- Announcement
- Last updated
- Verified
- , against AssemblyAI API's own pages
Questions
When does this change take effect?
Calls to POST /v2/transcript, body parameter summarization on AssemblyAI API stopped working on October 20, 2026.
What happens to calls after October 20, 2026?
They have failed since October 20, 2026.
How do I find the calls this hits in my code?
Okapi reads your repository, finds the calls this change hits and opens a pull request with the fix. It never commits to your branches: every change comes as a pull request you review.
More from AssemblyAI API 6
-
POST /lemur/v3/generate/action-itemsEndpoint removal Stopped working -
/v2/realtime/wsEndpoint removal Stopped working -
/lemur/v3/*Endpoint removal Stopped working -
POST /v2/transcriptParameter removal Stopped working -
POST /v2/transcriptParameter removal Stopped working -
No date
POST /v2/transcriptParameter removal Deprecated, no date
You fixed this one by hand.
Okapi opens the pull request with the fix before the next breaking change reaches your code.