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Diar Streaming Sortformer 4spk
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Diar Streaming Sortformer 4spk

huggingface.co·Infrastructure·🇺🇸

This NVIDIA model provides streaming speaker diarization using a Sortformer architecture, supporting up to 4 speakers. It is evaluated on datasets like NOTSOFAR1 and is designed for low-latency, real-time applications. The model is part of NVIDIA's NeMo toolkit and can be integrated into automatic speech recognition pipelines.

Open SourceApache-2.0
WebCLIAPI
D
Diar Streaming Sortformer 4spk preview
Visit huggingface.co↗
⭐17.8k
stars
🍴3.5k
forks
✓3
features
📅2019
since

Overview

3 features

Diar Streaming Sortformer 4spk is a Voice, TTS & speech product. It focuses on performing real-time speaker diarization on streaming audio with multiple speakers. Diar Streaming Sortformer 4spk is an open-source project aimed at developers building speech analytics and meeting transcription systems. The project is open source (Apache-2.0). Diar Streaming Sortformer 4spk is available on the web, the command line, and API.

It is developed by NVIDIA (United States), and the product first shipped in 2019. The project is developed in the open on GitHub with 17.8k stars and 132 commits in the last 90 days. Among its 3 catalogued features are Speaker Diarization, Streaming Inference, and 4 Speaker Support.

  • ✓Speaker Diarization
  • ✓Streaming Inference
  • ✓4 Speaker Support

Tags

speaker-diarizationstreaming-diarizationsortformernvidia

AI capabilities

Audio

Built with & integrations

Hosting
aws
AI providers
local_oss
Runs on
BrowserCLIAPI-only

Trust & compliance

LicenseApache-2.0
Verified signals
✓ HTTPS✓ Privacy Policy✓ Terms of Service✓ Open Source✓ Active maintenance
Legal
Privacy Policy →Terms of Service →

Recent events

Latest indexed changes and source events

  1. IndexedJul 21, 1:04 PM

    nvidia/diar_streaming_sortformer_4spk-v2.1 verified by the PulseGate indexer

    Source: PulseGate indexerOpen ↗

Frequently asked questions about Diar Streaming Sortformer 4spk

What is Diar Streaming Sortformer 4spk?
Diar Streaming Sortformer 4spk focuses on performing real-time speaker diarization on streaming audio with multiple speakers. It is catalogued under Voice, TTS & speech on PulseGate.
Who should use Diar Streaming Sortformer 4spk?
Diar Streaming Sortformer 4spk is an open-source project built for developers building speech analytics and meeting transcription systems.
Does Diar Streaming Sortformer 4spk have a free plan?
Yes — Diar Streaming Sortformer 4spk is open source under the Apache-2.0 license and free to use.
What platforms does Diar Streaming Sortformer 4spk run on?
Diar Streaming Sortformer 4spk runs on the web, the command line, and API.
Is Diar Streaming Sortformer 4spk still active?
PulseGate's liveness checks currently classify Diar Streaming Sortformer 4spk as active. The GitHub repository shows 132 commits in the last 90 days.
What tools are similar to Diar Streaming Sortformer 4spk?
Similar tools tracked by PulseGate include Speaker Diarization, Speaker Diarization, and Q4_0-nemotron-speech-streaming-en-0.6b.Speaker DiarizationSpeaker DiarizationQ4_0-nemotron-speech-streaming-en-0.6b
Who develops Diar Streaming Sortformer 4spk?
Diar Streaming Sortformer 4spk is developed by NVIDIA, based in the United States.
How long has Diar Streaming Sortformer 4spk been around?
Diar Streaming Sortformer 4spk first shipped in 2019.

At a glance

Pricing
Open Source
Platforms
Cli · Web
Languages
English
License
Apache-2.0
First seen
Jul 21, 2026
Activity
🟢 Active
Status
🟢 Active
Built for
developers building speech analytics and meeting transcription systems
Model
Open source
Solves
Performing real-time speaker diarization on streaming audio with multiple speakers.

Developer

🇺🇸NVIDIA
Community-driven

Open source

⭐ Stars
17,802
🍴 Forks
3,511
Open issues
220
Last commit
1w ago
Commits 90d
132
Contributors
494
Authorship
Community-driven
Default branch
main
Latest release
v2.7.3 · 3mo ago

Live coverage

Confidence
Medium · 70
Indexed
Jul 21, 2026
Lifecycle
Alive
Activity
Active
First seen
Jul 2026
Last seen
1w ago
Identity audit (10)
Entity ID
cmruo2lbh03lbcjzrmhn4u62s
Slug
nvidia-diar-streaming-sortformer-4spk-v2-1-huggingface-co
Lifecycle last checked
Jul 21, 2026
Verification state
Indexed for public listing
Claim / listing state
Unclaimed · listed: yes
Index status
Included in index
Latest evidence snapshot
Jul 21, 2026
Timeline basis
Indexed-at chronology (no inferred launch/funding milestones).
Last updated
Jul 24, 2026
Canonical URL
https://huggingface.co/nvidia/diar_streaming_sortformer_4spk-v2.1

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  • Speaker Diarization
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  • Q4_0-nemotron-speech-streaming-en-0.6b
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  • Speaker Diarization Community 1
    huggingface.co
  • Pyannote Speaker Diarization
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  • Nemotron Labs Diffusion 14B
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