What are the hardware requirements for NVIDIA Nemotron 3 Ultra 550B A55B?

NVIDIA Nemotron 3 Ultra 550B A55B requires approximately 204.9 GB of VRAM and supports a context window of 256K tokens. Quantized variants may run on less VRAM; see the Quantized Models section on this page.

Who developed NVIDIA Nemotron 3 Ultra 550B A55B and how large is it?

NVIDIA Nemotron 3 Ultra 550B A55B is developed by unsloth, a model with 550b parameters. The model is published as open weights on Hugging Face and indexed on LLM Explorer with full benchmark history.

Where can I download or evaluate NVIDIA Nemotron 3 Ultra 550B A55B?

NVIDIA Nemotron 3 Ultra 550B A55B is hosted on Hugging Face and linked from this page. LLM Explorer also lists quantized variants and similar alternatives if available.

NVIDIA Nemotron 3 Ultra 550B A55B by unsloth — VRAM 204.9GB, 256K context

Name: NVIDIA Nemotron 3 Ultra 550B A55B
Author: unsloth

NVIDIA Nemotron 3 Ultra 550B A55B is an open-source language model by unsloth. Features: 550b LLM, VRAM: 204.9GB, Context: 256K, License: other, LLM Explorer Score: 0.24.

Ar Base model:finetune:nvidia/nvi... Base model:nvidia/nvidia-nemot... Conversational Dataset:nvidia/nemotron-post-t... Dataset:nvidia/nemotron-pre-tr... De En Endpoints compatible Es Fr He Hi It Ja Ko Latent-moe Mtp Nemotron-3 Nemotron h Nvidia Pt Pytorch Region:us Safetensors Sharded Tensorflow Zh

Model Card on HF 🤗: https://huggingface.co/unsloth/NVIDIA-Nemotron-3-Ultra-550B-A55B

NVIDIA Nemotron 3 Ultra 550B A55B Parameters and Internals

LLM Name	NVIDIA Nemotron 3 Ultra 550B A55B
Repository 🤗	https://huggingface.co/unsloth/NVIDIA-Nemotron-3-Ultra-550B-A55B
Base Model(s)	...emotron 3 Ultra 550B A55B BF16 nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16
Model Size	550b
Required VRAM	204.9 GB
Updated	2026-08-11
Maintainer	unsloth
Model Type	nemotron_h
Model Files	5.0 GB: 1-of-225 5.0 GB: 2-of-225 5.0 GB: 3-of-225 5.0 GB: 4-of-225 4.9 GB: 5-of-225 5.0 GB: 6-of-225 5.0 GB: 7-of-225 5.0 GB: 8-of-225 5.0 GB: 9-of-225 5.0 GB: 10-of-225 5.0 GB: 11-of-225 5.0 GB: 12-of-225 5.0 GB: 13-of-225 5.0 GB: 14-of-225 5.0 GB: 15-of-225 5.0 GB: 16-of-225 5.0 GB: 17-of-225 5.0 GB: 18-of-225 5.0 GB: 19-of-225 5.0 GB: 20-of-225 5.0 GB: 21-of-225 5.0 GB: 22-of-225 5.0 GB: 23-of-225 5.0 GB: 24-of-225 5.0 GB: 25-of-225 5.0 GB: 26-of-225 5.0 GB: 27-of-225 5.0 GB: 28-of-225 5.0 GB: 29-of-225 5.0 GB: 30-of-225 5.0 GB: 31-of-225 5.0 GB: 32-of-225 5.0 GB: 33-of-225 5.0 GB: 34-of-225 5.0 GB: 35-of-225 5.0 GB: 36-of-225 5.0 GB: 37-of-225 5.0 GB: 38-of-225 5.0 GB: 39-of-225 5.0 GB: 40-of-225 5.0 GB: 41-of-225
Supported Languages	en fr es it de pt ja ko hi ar zh he
Model Architecture	NemotronHForCausalLM
License	other
Context Length	262144
Model Max Length	262144
Transformers Version	4.57.6
Vocabulary Size	131072

Rank the NVIDIA Nemotron 3 Ultra 550B A55B capabilities

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Instruction Following and Task Automation
Factuality and Completeness of Knowledge
Censorship and Alignment
Data Analysis and Insight Generation
Text Generation
Text Summarization and Feature Extraction
Code Generation
Multi-Language Support and Translation

Best Alternatives to NVIDIA Nemotron 3 Ultra 550B A55B

Best Alternatives	Context / RAM	Downloads	Likes
...motron 3 Ultra 550B A55B NVFP4	256K / 63.1 GB	240041	277
...emotron 3 Ultra 550B A55B BF16	256K / 204.9 GB	493863	308
...motron 3 Ultra 550B A55B NVFP4	256K / 63.1 GB	103	5
Nemotron 3 Labs Ultra Math SFT	256K / 85.9 GB	510	4
Nemotron 3 Labs Ultra Math RL	256K / 204.9 GB	374	3
...motron 3 Ultra 550B A55B GenRM	256K / 219.9 GB	2666	11
...on 3 Ultra 550B A55B Base BF16	256K / 209.9 GB	1005	29
Nemotron 3 Ultra 550B A55B	256K / 144.3 GB	473	2
...emotron 3 Ultra 550B A55B Base	256K / 209.9 GB	23	2
...B Abliterated Uncensored NVFP4	256K / 63.1 GB	582	5

Note: green Score (e.g. "73.2") means that the model is better than unsloth/NVIDIA-Nemotron-3-Ultra-550B-A55B.