26% offNVIDIA Nemotron 3 Ultra 550B API
Other·Text
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.
Pricing
Cheapest live price, per 1 million tokens.
Input / 1M tokens
$0.625 OpenRouter
Output / 1M tokens
$3.13 OpenRouter
Cache read / 1M
Repeated prompt prefixes
Cache read is the discounted rate for repeated prompt prefixes (system prompts, agent context).
Capabilities · 6
Specifications
- Context window
- 1M
- Max output
- 16K
- Type
- Text
- Creator
- Other
- Live sellers
- 30
- Requests / 24h
- 590
Price history · 60 days
Estimated monthly cost
30 days at the cheapest live price.
Quick start
OpenAI-compatible — change the base URL and key. Get a key from the dashboard.
from openai import OpenAI
client = OpenAI(
base_url="https://api.qubax.ai/v1",
api_key="YOUR_QUBAX_API_KEY",
)
response = client.chat.completions.create(
model="nvidia-nemotron-3-ultra-550b-a55b",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)About NVIDIA Nemotron 3 Ultra 550B
NVIDIA Nemotron 3 Ultra 550B is a language model developed by Other. It's particularly well-suited for tackling complex, multi-step reasoning problems, orchestrating tool-using agents that call APIs and external services, producing structured outputs for reliable data extraction and handling large contexts of up to 1M tokens. Its 1M-token context window means you can pass in entire documents, codebases, or conversation histories without losing context. It can write up to 16K tokens in a single response.
As of Nov 4, 2026, NVIDIA Nemotron 3 Ultra 550B costs $0.460 per 1M input tokens and $2.30 per 1M output tokens on Qubax, versus $0.625 / $3.13 on OpenRouter (26% less on input). A typical 1,000 chat requests (2K tokens in, 500 out) come to about $2.07. 30 independent compute providers currently serve it, so requests fail over automatically. It handled 590 requests on Qubax in the last 24 hours. Pay with USDC, USDT, BTC, ETH or 350+ other coins — no credit card required.
Similar-priced alternatives
Frequently asked questions
How much does the NVIDIA Nemotron 3 Ultra 550B API cost?
On Qubax, NVIDIA Nemotron 3 Ultra 550B costs $0.460 per 1M input tokens and $2.30 per 1M output tokens. This is 26% cheaper than OpenRouter's price of $0.625 per 1M input tokens.
Is the NVIDIA Nemotron 3 Ultra 550B API compatible with OpenAI?
Yes. Qubax provides an OpenAI-compatible API. You can use NVIDIA Nemotron 3 Ultra 550B as a drop-in replacement by changing your base URL to https://api.qubax.ai/v1 and using your Qubax API key. It works with Cline, Cursor, OpenCode, Hermes Agent, and any tool that supports OpenAI APIs.
Why is NVIDIA Nemotron 3 Ultra 550B cheaper on Qubax than OpenRouter?
Qubax sources AI inference from an open compute marketplace on the Base blockchain where GPU providers compete on price. We pass the savings to you — 26% cheaper than OpenRouter's price for NVIDIA Nemotron 3 Ultra 550B.
How do I pay for NVIDIA Nemotron 3 Ultra 550B API usage?
Qubax uses prepaid crypto credits. Top up with USDC, USDT, BTC, ETH, SOL or 350+ other coins and your balance is deducted as you use the API. No credit card or KYC required.
What is the context window of NVIDIA Nemotron 3 Ultra 550B?
NVIDIA Nemotron 3 Ultra 550B supports a context window of 1M tokens, allowing you to process large documents, codebases, or long conversations in a single request.
What can I build with NVIDIA Nemotron 3 Ultra 550B?
You can use NVIDIA Nemotron 3 Ultra 550B to tackle complex multi-step reasoning tasks, build autonomous agents that call external tools and APIs, generate structured JSON output for data pipelines and process long documents and entire codebases. Because it's served through Qubax's OpenAI-compatible API, integration into existing apps, agents, or workflows takes just a few lines of code.
How fast and reliable is NVIDIA Nemotron 3 Ultra 550B on Qubax?
Responses stream token by token. 30 sellers serve it, so if one is slow or down the request moves to the next.
NVIDIA Nemotron 3 Ultra 550B vs OpenAI: GPT-6.1 Terra Pro: which should I choose?
NVIDIA Nemotron 3 Ultra 550B by Other and OpenAI: GPT-6.1 Terra Pro by OpenAI are both strong models in a similar price tier. NVIDIA Nemotron 3 Ultra 550B excels at complex reasoning. OpenAI: GPT-6.1 Terra Pro comes from a different lab and may have different strengths depending on your workload. On Qubax, NVIDIA Nemotron 3 Ultra 550B starts at $0.460/1M input tokens while OpenAI: GPT-6.1 Terra Pro comes in at $0.450/1M, so OpenAI: GPT-6.1 Terra Pro may be worth considering if you need to minimize per-token cost. Both are available on Qubax with crypto payments and OpenAI-compatible APIs, so you can try each and switch freely.
Can I use NVIDIA Nemotron 3 Ultra 550B for commercial projects?
Yes. NVIDIA Nemotron 3 Ultra 550B on Qubax can be used for commercial purposes. You own the outputs you generate. Qubax provides the API infrastructure — you bring your use case.
Why use NVIDIA Nemotron 3 Ultra 550B on Qubax?
26% cheaper
Providers compete on price — you get the cheapest healthy seller.
Pay with crypto
350+ coins (BTC, ETH, SOL, USDT, USDC). No card, no KYC.
OpenAI & Anthropic compatible
Drop-in base URL. Works with Cline, Cursor, Claude Code, OpenAI and Anthropic SDKs.
