Open Source · language

Use Llama 3.1 405B with Python

Updated 2026-05-21 · By XALEN

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

Python

language · pip install xalen

1. Install

pip install xalen

2. Code

from xalen import XALEN

client = XALEN(api_key="xln_test_YOUR_KEY")

response = client.chat.completions.create(
    model="llama-3-1-405b",
    messages=[{"role": "user", "content": "Hello from Python!"}]
)
print(response.choices[0].message.content)

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Last updated: 2026-05-21