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NVIDIA: Llama 3.1 Nemotron Ultra 253B v1

by NVIDIA

Llama-3.1-Nemotron-Ultra-253B-v1 is a large language model (LLM) optimized for advanced reasoning, human-interactive chat, retrieval-augmented generation (RAG), and tool-calling tasks. Derived from Meta’s Llama-3.1-405B-Instruct, it has been significantly customized using Neural Architecture Search (NAS), resulting in enhanced efficiency, reduced memory usage, and improved inference latency. The model supports a context length of up to 128K tokens and can operate efficiently on an 8x NVIDIA H100 node. Note: you must include `detailed thinking on` in the system prompt to enable reasoning. Please see [Usage Recommendations](https://huggingface.co/nvidia/Llama-3_1-Nemotron-Ultra-253B-v1#quick-start-and-usage-recommendations) for more.

Avg Score

0.0%

0 answers

Avg Latency

0ms

0 runs

Pricing

$0.60

input

/

$1.80

output

per 1M tokens

Context

131K

tokens

Alternatives

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Other Models from NVIDIA

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ModelScoreLatencyCost/1M
NVIDIA: Nemotron 3 Nano 30B A3B——$0.0000
NVIDIA: Nemotron 3 Nano 30B A3B——$0.15
NVIDIA: Nemotron Nano 12B 2 VL——$0.0000
NVIDIA: Nemotron Nano 12B 2 VL——$0.40
NVIDIA: Llama 3.3 Nemotron Super 49B V1.5——$0.25
NVIDIA: Nemotron Nano 9B V2——$0.0000
NVIDIA: Nemotron Nano 9B V2——$0.10
NVIDIA: Llama 3.1 Nemotron 70B Instruct——$1.20

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Quickstart

Get started with this model using OpenRouter

View on OpenRouter
import { OpenRouter } from "@openrouter/sdk";

const openrouter = new OpenRouter({
  apiKey: "<OPENROUTER_API_KEY>"
});

const completion = await openrouter.chat.completions.create({
  model: "nvidia/llama-3.1-nemotron-ultra-253b-v1",
  messages: [
    {
      role: "user",
      content: "Hello!"
    }
  ]
});

console.log(completion.choices[0].message.content);

Get your API key at openrouter.ai/keys