What are the hardware requirements for NVIDIA Nemotron 3 Ultra 550B A55B Base BF16?

NVIDIA Nemotron 3 Ultra 550B A55B Base BF16 requires approximately 209.9 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 Base BF16 and how large is it?

NVIDIA Nemotron 3 Ultra 550B A55B Base BF16 is developed by nvidia, 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 Base BF16?

NVIDIA Nemotron 3 Ultra 550B A55B Base BF16 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 Base BF16 by nvidia — VRAM 209.9GB, 256K context

Name: NVIDIA Nemotron 3 Ultra 550B A55B Base BF16
Author: nvidia

NVIDIA Nemotron 3 Ultra 550B A55B Base BF16 is an open-source language model by nvidia. Features: 550b LLM, VRAM: 209.9GB, Context: 256K, License: other, LLM Explorer Score: 0.28.

Model Card on HF 🤗: https://huggingface.co/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-Base-BF16

NVIDIA Nemotron 3 Ultra 550B A55B Base BF16 Parameters and Internals

LLM Name	NVIDIA Nemotron 3 Ultra 550B A55B Base BF16
Repository 🤗	https://huggingface.co/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-Base-BF16
Model Size	550b
Required VRAM	209.9 GB
Updated	2026-08-05
Maintainer	nvidia
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 5.0 GB: 42-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 Base BF16 capabilities

Have you tried this model? Rate its performance — this feedback helps the ML community find the right model for their needs.

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 Base BF16

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
Nemotron 3 Ultra 550B A55B	256K / 144.3 GB	473	2
...emotron 3 Ultra 550B A55B Base	256K / 209.9 GB	23	2
...DIA Nemotron 3 Ultra 550B A55B	256K / 204.9 GB	19	1
...B Abliterated Uncensored NVFP4	256K / 63.1 GB	582	5

Note: green Score (e.g. "73.2") means that the model is better than nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-Base-BF16.