# summarization on POST /v2/transcript stops working

Calls to POST /v2/transcript, body parameter summarization on AssemblyAI API stopped working on October 20, 2026.

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.

## What to use instead

Use Summarization under Speech Understanding (speech_understanding.request.summarization) instead.

- API: AssemblyAI API (api.assemblyai.com)
- Kind: Parameter removal
- Announced: October 6, 2026
- Takes effect: October 20, 2026
- Calls after that day: fail
- Calls it hits: `POST /v2/transcript`, `body parameter summarization`
- Source: [Announcement](https://www.assemblyai.com/changelog)
- Verified: November 6, 2026, against AssemblyAI API's own pages
- Page: https://www.okapi.bot/providers/assemblyai-api/breaking-changes/summarization-on-post-v2-transcript-stops-working/

## 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.

Okapi finds the calls this change hits in your repo and opens the pull request with the fix: https://github.com/apps/okapi-agent