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NVIDIA Nemotron 3 Ultra 550B A55B

Chat model by NVIDIA.

nvidia language model featuring a 262,144-token context window. Engineered for dialogue, instruction following, and versatile text generation.

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Models / NVIDIA Nemotron 3 Ultra 550B A55BID: deepinfra/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B

Context window

Maximum input context length.

262.1K

tokens

Maker

NVIDIA

Served On: DeepInfra

Specifications

Context window, ranked against other chat models

Proportional scale: 0 to 1.05M tokens. Not ranked, no published context window: qwen-plus-2025-09-11, voxtral-small-24b-2507, qwen3.6-plus-2026-04-02.

Context window

262.1K

tokens
Max output

—

Modality

chat

Vision
Function calling
System prompt

Pricing

Rates are read live

Pricing for nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B is fetched from the live catalogue on load, so it is never served from a cache that could outlive a repricing.

Availability

Not enough data yet

We have not collected enough health probes for this model to publish an uptime or latency figure. A percentage from a handful of samples is fabricated precision, so none is shown until the sample count supports one.

How NVIDIA Nemotron 3 Ultra 550B A55B is billed

Billed at the provider's list price, with no per-token markup.

Exact list price
Tokens settle at the published rate of the model that served your call.
Cache discounts passed through
Provider prompt-caching discounts reach your balance with no added fee.
Cost on every response
Each response carries the x-nr-request-cost header, so you can reconcile spend per request.

Start building with nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B

One API key, three steps. Choose your tool to begin.

  1. Get a key

    Create API key

  2. Set your API key

    export NROUTER_API_KEY="<YOUR_API_KEY>"

  3. Configure Claude Code

    Choose a tool, then copy its setup from the panel.

npm install -g @anthropic-ai/claude-code
Claude Code · deepinfra/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B
# Point Claude Code to nRouter gateway
export ANTHROPIC_BASE_URL="https://api.nrouter.ai"
export ANTHROPIC_API_KEY="$NROUTER_API_KEY"

# Launch with deepinfra/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B
claude --model deepinfra/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B

FAQs

What is NVIDIA Nemotron 3 Ultra 550B A55B?

nvidia language model featuring a 262,144-token context window. Engineered for dialogue, instruction following, and versatile text generation.

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

NVIDIA Nemotron 3 Ultra 550B A55B is billed at the provider's list price on nRouter with no per-token markup — tokens settle at the exact upstream rate. Input and output rates are read live, so see the pricing section above for the current figures.

What is the context length of NVIDIA Nemotron 3 Ultra 550B A55B?

NVIDIA Nemotron 3 Ultra 550B A55B supports a 262,144-token context window.

Does NVIDIA Nemotron 3 Ultra 550B A55B support tool calling and structured outputs?

Yes. NVIDIA Nemotron 3 Ultra 550B A55B supports tool calling (function calling), so it can invoke external tools and APIs during a conversation.

What inputs and outputs does NVIDIA Nemotron 3 Ultra 550B A55B support?

NVIDIA Nemotron 3 Ultra 550B A55B takes text as input and returns text as output.

How do I use NVIDIA Nemotron 3 Ultra 550B A55B via nRouter?

Use any OpenAI-compatible client: point it at https://api.nrouter.ai/v1 with your nRouter API key and set the model to "deepinfra/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B". The quick-start panel above has a copy-paste curl command for this model.

When was NVIDIA Nemotron 3 Ultra 550B A55B released?

NVIDIA Nemotron 3 Ultra 550B A55B was released on October 7, 2026.

Where is the NVIDIA Nemotron 3 Ultra 550B A55B documentation?

Start at nrouter.ai/docs. The quick-start guide (nrouter.ai/docs/getting-started/quick-start) covers API keys and your first request, and the API reference (nrouter.ai/docs/api-reference) lists every parameter.