# Hugging Face — **Know Who Spoke When: Build Real-Time, Multi-Speaker AI with NVIDIA Nemotron 3 Diarization**

- Company: Hugging Face (huggingface.co)
- Announced: 2026-09-23T13:17:01+00:00
- Category: open-weight-release
- Coverage: 4 outlets
- Announcement: yes
- Group: models
- Source: https://huggingface.co/blog/nvidia/nemotron-diarization
- Record: https://forck.live/items/13419-know-who-spoke-when-build-real-time-multi-speaker-ai-with-nvidia-nemotron-3
- Subject: Platform
- Open weights: yes
- Models affected: NVIDIA Nemotron 3 Diarization

NVIDIA released Nemotron 3 Diarization, an open-weight 100M-parameter model that identifies which speaker is active at each moment in conversations with up to eight speakers. The model ranks #1 on Voice Arena's Diarization-Bench leaderboard with a 14.72% Diarization Error Rate and supports both live streaming and recorded audio with overlapping speech handling.

## Evidence

Verbatim from https://huggingface.co/blog/nvidia/nemotron-diarization:

> NVIDIA Nemotron 3 Diarization is an open-weight, 100M-parameter model that ranks #1 on Voice Arena's Diarization-Bench leaderboard with a 14.72% Diarization Error Rate (DER). Supporting up to eight speakers across live and recorded conversations, it handles overlapping speech, chunked processing for flexible recording lengths, and customizable streaming latency.

## Around this story

Outlets this record can name and link:

- The Wall Street Journal: https://wsj.com/economy/the-ai-build-out-is-becoming-the-biggest-economic-bet-in-u-s-history-c60716dd
- Quartz: https://qz.com/us-ai-infrastructure-buildout-biggest-economic-bet-history-092426
- Yahoo Finance — AI buildout on track to be biggest economic bet in U.S. history: https://finance.yahoo.com/economy/articles/ai-buildout-track-biggest-economic-134138247.html
- Bisnow — AI Buildout To Cost $10T, With Market Correction Likely: https://bisnow.com/news/national/data-center/brookings-study-ai-build-out-likely-ends-in-market-correction

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