NVIDIA: Llama 3.1 Nemotron Ultra 253B v1

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Llama 3.1 Nemotron Ultra 253B is a 253B parameter reasoning model derived from Llama 3.1 405B using Neural Architecture Search for improved efficiency, supporting 128K context and toggle ON/OFF reasoning modes. It excels at complex math, scientific reasoning, coding, RAG, and tool calling tasks while fitting on a single 8xH100 node.

Context Window 131K

tokens

Max Output N/A

tokens

Input Cost $0.6

per million tokens

Output Cost $1.8

per million tokens

Release Date Apr 7, 2025

 

Code Example

Add AI to your app with the Puter.js AI API — no API keys or setup required.

// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';

puter.ai.chat("Explain quantum computing in simple terms").then(response => {
    document.body.innerHTML = response.message.content;
});

<html>
<body>
    <script src="https://js.puter.com/v2/"></script>
    <script>
        puter.ai.chat("Explain quantum computing in simple terms").then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

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Frequently Asked Questions

How do I use Llama 3.1 Nemotron Ultra 253B v1?

You can access Llama 3.1 Nemotron Ultra 253B v1 by NVIDIA through Puter.js AI API. Include the library in your web app or Node.js project and start making calls with just a few lines of JavaScript — no backend and no configuration required. You can also use it with Python or cURL via Puter's OpenAI-compatible API.

Is Llama 3.1 Nemotron Ultra 253B v1 free?

Yes, it is free if you're using it through Puter.js. With the User-Pays Model, you can add Llama 3.1 Nemotron Ultra 253B v1 to your app at no cost — your users pay for their own AI usage directly, making it completely free for you as a developer.

What is the pricing for Llama 3.1 Nemotron Ultra 253B v1?
Pricing for Llama 3.1 Nemotron Ultra 253B v1 is based on the number of input and output tokens used per request.
Price per 1M tokens
Input$0.6
Output$1.8
Who created Llama 3.1 Nemotron Ultra 253B v1?

Llama 3.1 Nemotron Ultra 253B v1 was created by NVIDIA and released on Apr 7, 2025.

What is the context window of Llama 3.1 Nemotron Ultra 253B v1?

Llama 3.1 Nemotron Ultra 253B v1 supports a context window of 131K tokens. For reference, that is roughly equivalent to 262 pages of text.

Does it work with React / Vue / Vanilla JS / Node / etc.?

Yes — the Llama 3.1 Nemotron Ultra 253B v1 API works with any JavaScript framework, Node.js, or plain HTML through Puter.js. Just include the library and start building. See the documentation for more details.

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