NVIDIA published nvidia/Nemotron-3-Diarization on 2026-09-23. The released checkpoint is a retrained model, not the preview we shipped against: 0 of 359 shared tensors are bit-identical, the Sortformer head is effectively re-initialised, and it adds an auxiliary activity head.
All seven presets and both host assets are regenerated from it, parity-checked against the NeMo reference, and re-benchmarked on AMI MHM with forced-alignment references at collar 0. Licence moves to OpenMDW 1.1.
