AssemblyAI API
speech_model body parameter removal on POST /v2/transcript
Deprecated, no dateSubscribe to AssemblyAI APIShare
AssemblyAI deprecated the body parameter speech_model on POST /v2/transcript on July 10, 2026, without announcing a shutdown date. Requests that supply current model names like universal-2 or universal-3-5-pro in the speech_model field now fail with a 400 error.
Calls it hits
POST /v2/transcriptbody parameter speech_model
What to use instead of these calls
Send speech_models as a list, such as ["universal-3-5-pro", "universal-2"], instead of speech_model to pin a model.
In AssemblyAI API's words
Deprecated: Async speech_model Parameter Passing a current model name ( universal-2 , universal-3-5-pro ) to the async speech_model field now returns a 400.
Facts
- API
- AssemblyAI API
api.assemblyai.com - Kind
- Parameter removal
- Announced
- July 10, 2026
- Takes effect
- No date given yet
- Calls after that day
- Fail
- Source
- Announcement
- Last updated
- Verified
- , against AssemblyAI API's own pages
Questions
When does this change take effect?
AssemblyAI API deprecated POST /v2/transcript, body parameter speech_model without giving a shutdown date yet.
Do these calls still work?
Yes, they still work: AssemblyAI API has not given a shutdown date yet.
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.
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Is your code calling this?
Okapi finds the calls this change hits in your repo and opens the pull request with the fix.