# summarization on POST /v2/transcript stops working

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

- API: AssemblyAI API (api.assemblyai.com)
- Kind: Endpoint 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)
- Page: https://www.okapi.bot/providers/assemblyai-api/breaking-changes/summarization-on-post-v2-transcript-stops-working/

## What to use instead

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

## 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.