Voice: speakers and sound

Nemotron 3 Diarization

Marks up a recording by speaker: who spoke when, for up to eight participants, both in files and live. The model is small, ships a GGUF build and runs without a GPU. Call recordings are personal data, so retention rules are agreed with a lawyer.

Developer
NVIDIA, USA
First release
Aug 2026
Latest release
Sep 2026
Sizes
100M
License
Commercial use allowedOpenMDW 1.1
Ready-made builds
GGUF
Running
On your own serverAlso runs without a GPU
Industries
Customer support, Documents and accounting, Media and production
Deploy on your server Hugging Face GitHub

What it does

  • Splitting a call or meeting recording by participant
  • Adding speaker names to a transcript
  • Live speaker labelling during a conversation
  • Preparing minutes for a multi-person meeting

Where it is used

Call centres and supportMedia and podcastsDocument workflows and minutes

Hardware requirements

LaptopLaptop or regular PC, up to 8 GB of VRAM — smaller versions
fits
1 GPUOne GPU with 16–80 GB — mid-size versions
no versions
ClusterServer with several GPUs — flagship versions
no versions

Versions

  1. Nemotron 3 Diarization
  2. Nemotron 3 Diarization preview

How to run it

On your own serverWeights are downloaded from Hugging Face and served with vLLM (load and API) or llama.cpp (modest hardware). The model then runs in a closed network with no per-request fees.Hugging Face
How much hardware you needCalculate the VRAM for the model size, context length and number of concurrent requests.Open the hardware calculator

I can set this up end to end: pick the model size, deploy it on your server and connect it to your systems. Quantization compresses a model so it takes less video memory and runs on more modest hardware. Answers change slightly, so quality is checked on your own examples.

Frequently asked questions

Can Nemotron 3 Diarization be used in a commercial project?

Yes. License: OpenMDW 1.1. It allows commercial use, but it is still worth having a lawyer review the license before launch.

What hardware does Nemotron 3 Diarization need?

At minimum: Laptop or regular PC, up to 8 GB of VRAM — smaller versions. Some versions also run on an ordinary CPU, without a GPU. You can calculate the exact VRAM for your model size and context in the hardware calculator.

Does Nemotron 3 Diarization support Russian?

Language does not matter for this model: it does not work with text.

Where can I download Nemotron 3 Diarization and what does it cost?

The Nemotron 3 Diarization weights are open and free to download. You only pay for the hardware it runs on and for the setup. Source links are at the bottom of this page.

How I deploy it for clients

  1. SelectionI pick the model size for your task and hardware and test it on your examples.
  2. DeploymentI deploy it on your server or in a closed network and provide an API.
  3. Fine-tuningI fine-tune it on your data (LoRA) or connect a knowledge base — whichever is cheaper for the task.
  4. IntegrationI connect it to your CRM, ERP, bot, website or team chat and set up monitoring.

Similar models

Voice: speakers and soundNVIDIA Sortformer / TitaNetNVIDIA · USACommercial use with conditions

NVIDIA models for "who is speaking": TitaNet recognizes a specific person's voice, Sortformer splits a recording into up to 4 speakers, including live during a call.

DetailsVoice: speakers and soundpyannote (диаризация)pyannoteAI (Hervé Bredin) · FranceCommercial use allowed

The most widely used open tool for splitting a recording by speaker: who spoke and when. Usually paired with speech recognition. Weights are issued after a short form on HF.

DetailsVoice: speakers and soundWeSpeakerWeNet community · ChinaCommercial use allowed

A set of ready-made voiceprint models: checks whether the same person speaks in two recordings and helps split a recording by speaker. One of the models is built into pyannote 3.x.

Details

Source: huggingface.co/nvidia/Nemotron-3-Diarization. Data checked against the model card on 22 Sep 2026. Have a lawyer review the license before commercial launch.