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NVIDIA Nemotron 3 Ultra 550B API

Access NVIDIA Nemotron 3 Ultra 550B through a simple, OpenAI-compatible API. Change one URL and one key — your existing code works immediately. No SDK changes needed.

99% cheaper than OpenRouter

NVIDIA Nemotron 3 Ultra 550B Pricing

Token TypeQubaxRetailSave
Input (per 1M)$0.0081$0.62599%
Output (per 1M)$0.041$3.1399%

At $0.0081/1M input tokens, NVIDIA Nemotron 3 Ultra 550B is one of the most affordable APIs in its class.

Why use NVIDIA Nemotron 3 Ultra 550B API on Qubax?

  • ⚡Point your OpenAI SDK at https://api.qubax.ai/v1
  • ⚡Use model ID: nvidia-nemotron-3-ultra-550b-a55b
  • ⚡Generate API keys starting with qbx_live_
  • ⚡Full streaming, function calling, and vision support

About NVIDIA Nemotron 3 Ultra 550B

NVIDIA Nemotron 3 Ultra 550B-A55B — NVIDIA flagship reasoning model (550B total / 55B active MoE) tuned for agentic workloads, with a 1M-token context window. It supports a 1M-token context window and up to 16K output tokens per request. Native capabilities include reasoning, tool calling, structured output, streaming. On Qubax it is served by 111 independent sellers, so pricing stays competitive and uptime stays high.

1M context window16K max output tokensBuilt-in reasoningFunction & tool callingJSON schema responsesToken streaming

NVIDIA Nemotron 3 Ultra 550B API Access — code example

Python — OpenAI SDK, one-line switchpython
from openai import OpenAI

# Only two lines change vs the official API:
client = OpenAI(
    base_url="https://api.qubax.ai/v1",
    api_key="qbx_live_YOUR_KEY",
)

response = client.chat.completions.create(
    model="nvidia-nemotron-3-ultra-550b-a55b",
    messages=[{"role": "user", "content": "Hello, NVIDIA Nemotron 3 Ultra 550B!"}],
)
print(response.choices[0].message.content)

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Get started in 60 seconds

  1. 1Create a free account at qubax.ai/register
  2. 2Add crypto credits (200+ coins, $3 minimum, credits never expire)
  3. 3Generate an API key and set your base URL to https://api.qubax.ai/v1
  4. 4Use model ID nvidia-nemotron-3-ultra-550b-a55b — done!

NVIDIA Nemotron 3 Ultra 550B API Access FAQ

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

On Qubax, NVIDIA Nemotron 3 Ultra 550B costs $0.0081 per 1M input tokens and $0.041 per 1M output tokens. 99% cheaper than OpenRouter. Pay with 200+ cryptocurrencies.

Can I use NVIDIA Nemotron 3 Ultra 550B with my existing tools?

Yes. Qubax is fully OpenAI-compatible. Change your base URL to api.qubax.ai/v1 and use your Qubax key. Works with Cline, Cursor, OpenCode, LangChain, and any OpenAI SDK.

Do I need a credit card?

No. Qubax accepts 200+ cryptocurrencies. No credit card, no KYC.

Start using NVIDIA Nemotron 3 Ultra 550B API

No credit card. Crypto accepted. Credits never expire.

Get started →
Also available for:💻 Coding💬 Chatbots🤖 AI Agent🪙 Crypto Payments
NVIDIA Nemotron 3 Ultra 550B API — 99% off · Qubax AI