NVIDIA Nemotron 3 Nano Omni Review — 30B Params, 3B Active, Sees Everything

NVIDIA Nemotron 3 Nano Omni (April 2026) is an open multimodal model with 30B total parameters but only 3B active per forward pass. Hybrid Mamba-Transformer MoE architecture with C-RADIOv4-H vision encoder and Parakeet-TDT audio encoder. Understands text, images, audio, video, documents, charts, and GUIs. 9x higher throughput than comparable open omni models. Available on HuggingFace, OpenRouter, and NVIDIA NIM. Rating: 4/5.