NVIDIA Releases Nemotron 3 Diarization: A 100M-Parameter Open-Weight Model That Tracks 8 Speakers in Real Time

It answers "who spoke when" in a conversation, even when people talk over each other.
One open-weight checkpoint handles both offline audio and real-time streaming.

✅ 100M parameters, open weights on Hugging Face

✅ OpenMDW-1.1 license, commercial use allowed

✅ Tracks up to 8 speakers, overlap included

✅ 14.72% DER on Diarization-Bench vs 19.3% runner-up

✅ 4 streaming presets, from 30.4 s down to 0.32 s

✅ 41.0% average relative DER cut vs Streaming Sortformer

✅ 15,113x batched RTFx on RTX PRO 5000, 30.4 s preset

✅ Runs through NVIDIA NeMo on Linux GPUs

Full breakdown + interactive explainer: https://www.marktechpost.com/2026/09/23/nvidia-releases-nemotron-3-diarization/

Model: https://huggingface.co/nvidia/Nemotron-3-Diarization
NVIDIA blog: https://huggingface.co/blog/nvidia/nemotron-diarization
Live demo: https://huggingface.co/spaces/nvidia/nemotron-diarization