---
title: "AssemblyAI API changes, deprecations and deadlines | Harbyn"
description: "AssemblyAI: 0 upcoming deadlines and 18 recorded changes as of 2026-10-25, each with its source."
canonical: "https://harbyn.com/vendors/assemblyai"
last-updated: 2026-10-25
---

# AssemblyAI: API changes and deadlines

Markdown version of <https://harbyn.com/vendors/assemblyai>.

AI models and APIs. 0 upcoming deadlines, 18 recorded changes. Every entry cites the AssemblyAI page we read it from.

## What we read

The AssemblyAI pages and feeds our ingestion visits, politely and on a schedule.

- **Changelog**: <https://www.assemblyai.com/changelog>
- **Changelog**: <https://api.github.com/advisories?affects=assemblyai&per_page=20&sort=published&direction=desc>

## What the scanner looks for

How `harbyn scan` recognises AssemblyAI in a repository, on your machine. Nothing leaves it.

- **Packages**: `npm assemblyai`, `pypi assemblyai`
- **API hosts**: `api.assemblyai.com`

## Upcoming deadlines

No upcoming AssemblyAI deadline in the feed right now.

## Change history

Newest first, by the date AssemblyAI announced it. This is the archive: past changes are not warnings, and changes we recorded after they took effect are marked as such.

### October 2026

- Oct 16, 2026, Behavior change: [Reduced hallucinations on silent multichannel audio](https://harbyn.com/changes/assemblyai/2026-10-16-reduced-hallucinations-on-silent-multichannel-audio.md)
- Oct 15, 2026, Feature: [Muse Spark Open available on the LLM Gateway](https://www.assemblyai.com/changelog)
- Oct 13, 2026, Feature: [Gemini 4 Argon available on the LLM Gateway](https://www.assemblyai.com/changelog)
- Oct 8, 2026, Feature: [Structured output support for GPT-6 and Claude models](https://www.assemblyai.com/changelog)
- Oct 7, 2026, Behavior change: [Clearer error for deleted API keys](https://harbyn.com/changes/assemblyai/2026-10-07-clearer-error-for-deleted-api-keys.md)
- Oct 6, 2026, Retirement: [Legacy Summarization and Auto Chapters retire October 20](https://harbyn.com/changes/assemblyai/2026-10-06-legacy-summarization-and-auto-chapters-models-deprecated.md) (effective Oct 20, 2026; recorded after the fact)

### September 2026

- Sep 29, 2026, Behavior change: [Summarization chapter count scales with audio length](https://harbyn.com/changes/assemblyai/2026-09-29-summarization-chapter-count-scales-with-audio-length.md)
- Sep 29, 2026, Feature: [Universal-3.6 Pro Realtime launched](https://www.assemblyai.com/changelog)
- Sep 21, 2026, Feature: [Four NVIDIA Nemotron models available in LLM Gateway](https://www.assemblyai.com/changelog)
- Sep 21, 2026, Feature: [DeepSeek v4.1 Flash, GLM 5.3, GLM 5.3 Flash and Nemotron available in LLM Gateway](https://www.assemblyai.com/changelog)
- Sep 16, 2026, Behavior change: [French transcript punctuation fix](https://harbyn.com/changes/assemblyai/2026-09-16-french-transcript-punctuation-fix.md)
- Sep 16, 2026, Behavior change: [Improved speaker diarization for non-English audio](https://harbyn.com/changes/assemblyai/2026-09-16-improved-speaker-diarization-for-non-english-audio.md)
- Sep 16, 2026, Feature: [Pre-connect requests on the Voice Agent API](https://www.assemblyai.com/changelog)
- Sep 14, 2026, Feature: [Gemini 3.8 Flash available in LLM Gateway](https://www.assemblyai.com/changelog)
- Sep 14, 2026, Feature: [Kimi K3 available in LLM Gateway](https://www.assemblyai.com/changelog)
- Sep 14, 2026, Feature: [MiniMax M3 available in LLM Gateway](https://www.assemblyai.com/changelog)
- Sep 11, 2026, Feature: [GPT-6 Astra available in LLM Gateway](https://www.assemblyai.com/changelog)
- Sep 9, 2026, Feature: [Public LLM Gateway models endpoint](https://www.assemblyai.com/changelog)