Does NVIDIA-Nemotron-3-Ultra-550B-A55B support zero data retention?

Yes. NVIDIA-Nemotron-3-Ultra-550B-A55B is available with zero data retention on DeepInfra through the Opper gateway. Other routes carry zero data retention with abuse monitoring; see each route's window in the data-handling section.

Where is NVIDIA-Nemotron-3-Ultra-550B-A55B hosted?

NVIDIA-Nemotron-3-Ultra-550B-A55B runs on US hosting routes through the Opper gateway.

Is NVIDIA-Nemotron-3-Ultra-550B-A55B trained on prompts and outputs?

Training behaviour varies by route. See the per-route data-handling section for each provider's training posture.

Is a GDPR DPA available for NVIDIA-Nemotron-3-Ultra-550B-A55B?

Yes. A GDPR Data Processing Agreement is available on at least one route serving NVIDIA-Nemotron-3-Ultra-550B-A55B. Contact hello@opper.ai to receive it.

NVIDIA-Nemotron-3-Ultra-550B-A55B

by NVIDIA

Nemotron 3 Ultra 550B A55B is NVIDIA's largest open-weight reasoning model, with 550B total parameters and 55B active per token through a hybrid Mamba-Transformer LatentMoE architecture with Multi-Token Prediction. It natively supports a 262K token context and speculative decoding, and is built for the most demanding agentic AI workloads. Pre-trained on trillions of tokens spanning code, math, science, and general knowledge across many natural and programming languages, the Ultra model is tuned for long-running agent loops and high-complexity problem-solving. NVIDIA reports substantially higher inference throughput than several similarly scaled competitors on long-context settings, with the LatentMoE design projecting tokens into a smaller latent dimension for more efficient expert routing. The model excels at multi-agent coordination, complex reasoning patterns, and knowledge-intensive retrieval at scale, and is available across NVFP4 and BF16 precisions for different hardware configurations.

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Key info

Input

Output

Features

Context window

262K

Max output

262K

Input price

$0.50 /1M$0.10 cache read

Output price

$2.20 /1M

US residency available
Zero data retention on pay-as-you-go
GDPR DPA available

Available routes

NVIDIA-Nemotron-3-Ultra-550B-A55B runs on 4 different routes through the Opper gateway. Compare residency, zero data retention and training posture at a glance, with full data-handling detail per route below.

Provider	Region	Training	Input	Output	Cache read
DeepInfra	US	No	$0.50	$2.20	$0.10
DigitalOcean	US	No	$0.90	$1.70	Input price
Nebius	Multi	No	$1.00	$3.00	Input price
Perplexity	Multi	—	$0.25	$2.50	$0.25

Live routes and prices as JSON: api.opper.ai/v3/models?q=deepinfra%2Fnvidia%2FNVIDIA-Nemotron-3-Ultra-550B-A55B

Uptime and availability

NVIDIA-Nemotron-3-Ultra-550B-A55B runs on 3 independently monitored routes through the Opper gateway. A direct integration leaves you on one of them, the gateway serves whichever is healthy.

100%effective uptime, last 30 days

Averaged across these routes on their own, a single provider reached 97.85% over the same window.

Daily status through the gateway, which serves each request from whichever route is healthy.

3 monitored providers serve NVIDIA-Nemotron-3-Ultra-550B-A55B.

Measured over the last 30 days from each provider's official status feed via StatusGator. Refreshed hourly. 1 further route for this model is not on the board yet and is not counted above. See uptime for every provider Opper monitors.

Data handling per route

Each route hosting NVIDIA-Nemotron-3-Ultra-550B-A55B has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

DeepInfra — United States🇺🇸

Zero data retention: nothing is logged, held for abuse monitoring or used for training. No training on customer data. US; unknown; DPA available.

Zero data retention: Yes. Nothing is logged, held for abuse monitoring or used for training.
Training: No training on customer data.
Logging: None
Abuse monitoring: No classifier
GDPR DPA: DPA available
Transfer mechanism: unknown

DigitalOcean — United States🇺🇸

Zero data retention with abuse monitoring: nothing is logged or used for training; content flagged by abuse monitoring is held for review. No training on customer data. US; dpf sccs; DPA available.

Zero data retention: With abuse monitoring, flagged content held.
Training: No training on customer data.
Logging: None
Abuse monitoring: Always on, holds flagged content, stored in United States
Caching: Content cached for replay
Subprocessor access: No subprocessor reads content
GDPR DPA: DPA available
Transfer mechanism: dpf sccs

Nebius — Multi-region

Content is retained: provider logging. No training on customer data. GLOBAL; SCCs; DPA available.

Zero data retention: Retained: provider logging.
Training: No training on customer data.
Logging: Other
Abuse monitoring: No classifier
GDPR DPA: DPA available
Transfer mechanism: SCCs

Perplexity — Multi-region

Content is retained: provider logging. Training posture pending review. GLOBAL; unknown.

Zero data retention: Retained: provider logging.
Logging: Other
Caching: Content cached for replay
Transfer mechanism: unknown

Get started

Call NVIDIA-Nemotron-3-Ultra-550B-A55B through the Opper gateway with one API key. Opper is drop-in compatible with the OpenAI, Anthropic and Google AI SDKs.

NVIDIA-Nemotron-3-Ultra-550B-A55B is a premium model on Opper. Sign up needs no credit card: you get an API key straight away and the free models work in the playground and the API. Add a card to use premium models, pay-as-you-go with no minimum.

Set it up with your agent

Copy this and paste it into a coding agent like Claude Code, Cursor or Codex and it'll wire up Opper for you.

Or call it directly

1import OpenAI from "openai";
2
3const client = new OpenAI({
4  apiKey: process.env.OPPER_API_KEY,
5  baseURL: "https://api.opper.ai/v3/compat",
6});
7
8const completion = await client.chat.completions.create({
9  model: "deepinfra/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);