Open Source · language

Use Llama 3.1 405B with JavaScript

Updated 2026-05-21 · By XALEN

How to use Llama 3.1 405B (Open Source, 405B) with JavaScript. Install, authenticate, and make your first API call in minutes. Working code example included.

Model

Llama 3.1 405B

405B · 128K context · $0.08 input

Framework

JavaScript

language · npm install xalen-sdk

1. Install

npm install xalen-sdk

2. Code

import XALEN from 'xalen-sdk';

const client = new XALEN({ apiKey: 'xln_test_YOUR_KEY' });

const response = await client.chat.completions.create({
  model: 'llama-3-1-405b',
  messages: [{ role: 'user', content: 'Hello from JavaScript!' }]
});
console.log(response.choices[0].message.content);

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Last updated: 2026-05-21