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Nemotron 3 Ultra 550B-A55B

OpenMDW 1.1

NVIDIA · 550B (55B active) · Mixture of Experts

NVIDIA frontier hybrid LatentMoE model for agentic reasoning, tool use, RAG, and multilingual long-context work

0 downloads 0 likes 2026-06 1024K context

Use Cases

chat reasoning code rag

Quantization Options

Quant Bits VRAM Quality Status
Q2_K 2 176.6 GB low
Q3_K_M 3 247 GB moderate
Q4_K_M 4 282.2 GB good
Q5_K_M 5 352.7 GB good
Q6_K 6 423.1 GB excellent
Q8_0 8 564 GB excellent
F16 16 1127.4 GB lossless

About this model

HF model card Nemotron
Nemotron 3 Ultra 550B-A55B source artwork

NVIDIA

550B

Mixture of Experts model for chat, reasoning, code workloads.

Context

1024K

Q4 VRAM

~282.2 GB

Image saved from public model sources

Mixture of Experts Thinking Tool use Code

Nemotron 3 Ultra 550B-A55B on your hardware

NVIDIA frontier hybrid LatentMoE model for agentic reasoning, tool use, RAG, and multilingual long-context work. This page turns the Hugging Face model card into practical local-run numbers, so you can compare quantized VRAM, system RAM, and expected fit before downloading a large checkpoint.

Model shape

550B total parameters with 55B active. Dense models use the whole network for each token.

Local fit target

Start with Q4_K_M: about 268.9 GB on disk and 282.2 GB VRAM before extra context and runtime overhead.

Best use cases

chat, reasoning, code, rag

License and source

Listed as OpenMDW 1.1 from huggingface.co/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16.

Want the real verdict? Pick your GPU or edit the specs on this page and compare the quant table below.

Open HF repo

Benchmark snapshot

Public eval numbers from the model card or benchmark indexes. Scores use each benchmark's own scale, so compare rows by task type, not as one combined rating.

Source
8 public scores nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16 Hugging Face model card

Coding agent

SWE-Bench Verified

70.7

Coding agent

Terminal Bench 2.1

56.4

Coding

LiveCodeBench v6

89.0

Reasoning

GPQA

87.0

No tools

Knowledge

MMLU-Pro

86.8

Long context

RULER 1M

94.7

Agentic

TauBench V3 Average

70.9

Multilingual

MMLU-ProX

83.0