Open Source · language

Use Llama 3.1 405B with PHP

Updated 2026-05-21 · By XALEN

How to use Llama 3.1 405B (Open Source, 405B) with PHP. 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

PHP

language · composer require openai-php/client

1. Install

composer require openai-php/client

2. Code

<?php
require 'vendor/autoload.php';

$client = OpenAI::factory()
    ->withApiKey('xln_test_YOUR_KEY')
    ->withBaseUri('https://api.xalen.io/v1')
    ->make();

$response = $client->chat()->create([
    'model' => 'llama-3-1-405b',
    'messages' => [
        ['role' => 'user', 'content' => 'Hello from PHP!']
    ]
]);

echo $response->choices[0]->message->content;

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Last updated: 2026-05-21