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

What happened

Nemotron 3 Diarization expands support to eight speakers and improves the accuracy and throughput measured in the following evaluations. Why speaker diarization matters Every conversation carries two layers of information: what was said and who said it .

Speaker diarization classifies who spoke when , helping applications connect what was said to the right participant. Consider a transcript from a meeting, customer call, or podcast in which every sentence is correct but none is attributed to a speaker.

Speaker diarization identifies the time intervals during which each speaker is active, including intervals where people talk over one another. NVIDIA Nemotron 3 Diarization is an open-weight, 100M-parameter model that ranks #1 on VoiceArena's Diarization-Bench leaderboard with a 14.72% Diarization Error Rate (DER).