by Nvidia

NVIDIA: Nemotron 3 Ultra.

text open weights datacenter 550B params 1M ctx
Cheapest input
$0.6/M
on Together AI
Cheapest output
$2.4/M
on OpenRouter
Smallest GPU
2× AMD MI300

NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE). Built on a hybrid Transformer-Mamba mixture-of-experts architecture, it...

Smallest GPU to run it See all quantisations →

2× AMD MI300.

Most-aggressive quantisation we have a working recommendation for. Lower precision = less VRAM = cheaper hardware, at a small accuracy cost.

Where to use it

Cheapest hosted endpoints.

Provider Access $/M in $/M out
Together AI hosted inference $0.6 $3.6 Launch ↗
OpenRouter api aggregator $0.6 $2.4 Launch ↗
Sources

Official references.

FAQ

Frequently asked.

How do I run NVIDIA: Nemotron 3 Ultra?
NVIDIA: Nemotron 3 Ultra is open-weight, so you can self-host on rented GPUs. See the Run It Yourself tab for GPU configurations + cost estimates, or use one of the hosted inference providers listed on this page.
Where can I access NVIDIA: Nemotron 3 Ultra?
NVIDIA: Nemotron 3 Ultra is available via Together AI, OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run NVIDIA: Nemotron 3 Ultra?
API pricing starts at $0.5/M input tokens and $2.5/M output tokens. Self-hosting cost depends on the GPU you rent — see the Run It Yourself tab.
Is NVIDIA: Nemotron 3 Ultra open-source or proprietary?
NVIDIA: Nemotron 3 Ultra is open-weight under the license. You can download and self-host it.