nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16 on Hugging Face

nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16 · Hugging Face

NVIDIA released Nemotron-3-Ultra-550B-A55B-BF16 with 550B total parameters, 55B active parameters, a 1M-token context window, and minimum hardware listed as 8x H200, 16x H100, or 8x GB200/B200/GB300/B300.

Why it matters: HKR-H/K/R all pass: NVIDIA open-weight scale, 550B/55B active params, and 1M context are concrete. Missing benchmarks, license, and availability details keep it in the 78–84 band, not P1.