Model garden Router · on request Dedicated · available

NVIDIA Nemotron 3 Ultra 550B A55B BF16

Runs as your own dedicated GPU deployment, ready to launch from the wizard. Data stays in Europe.

For more details on how to deploy and use the model - see the Quick Start Guide below!

nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16 On request
text->text · nvidia · sovereign EU
Runs on EU infrastructure operated by European companies; US marketplace capacity is never part of this chain. Full chain
550B
Parameters
262K
Context window
1346GB
Minimum VRAM
POST /api/v1/chat/completions On request

Specifications

Parameters 550B
Context window 262,144 tokens
Minimum VRAM 1346 GB
Architecture NemotronHForCausalLM (vLLM)
License open-weights
Modality text->text
Released June 2026
Publisher nvidia ↗

Pricing

Shared router · per token
On request
Not available on the shared router. Pricing on request as a dedicated GPU deployment.
Dedicated GPU · per hour
from €54,00 per hour
Your own vLLM instance on European cloud (1346 GB VRAM), billed hourly.

Shared EU router, pay-per-token, scale-to-zero. Dedicated GPU deployments are billed hourly, see pricing.

Call it now

Drop-in replacement for OpenAI: change only the base URL and API key. The Anthropic format (/v1/messages) is supported too.

curl https://hostyourai.com/api/v1/chat/completions \
  -H "Authorization: Bearer hyai-..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Frequently asked questions

Can I run NVIDIA Nemotron 3 Ultra 550B A55B BF16 in the EU?

Yes. HostYourAI runs NVIDIA Nemotron 3 Ultra 550B A55B BF16 on GPUs in European datacenters via vLLM. Prompts and outputs never leave the EU and there is no US cloud provider in the chain.

Is hosting NVIDIA Nemotron 3 Ultra 550B A55B BF16 GDPR-compliant?

Yes. All processing happens inside the EU, a Data Processing Agreement (DPA) is available and the subprocessor list is public. Open-source weights also mean: no training on your data.

How much does NVIDIA Nemotron 3 Ultra 550B A55B BF16 cost?

NVIDIA Nemotron 3 Ultra 550B A55B BF16 is available on request: through the shared EU router after a quick chat, or as your own dedicated GPU deployment billed per hour. Tell us your use case and we will set it up for you.

Is the API OpenAI-compatible?

Yes. You use the standard OpenAI SDKs with a custom base URL (https://hostyourai.com/api/v1). The Anthropic Messages API is supported as a drop-in as well.

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