Open Source · mobile

Use Llama 3.3 70B with Swift (iOS)

Updated 2026-05-21 · By XALEN

How to use Llama 3.3 70B (Open Source, 70B) with Swift (iOS). Install, authenticate, and make your first API call in minutes. Working code example included.

Model
Llama 3.3 70B
70B · 128K context · $0.04 input
Framework
Swift (iOS)
mobile · SPM: xalen-swift

1. Install

SPM: xalen-swift

2. Code

import Foundation

func chat(_ question: String) async throws -> String {
    var request = URLRequest(url: URL(string: "https://api.xalen.io/v1/chat/completions")!)
    request.httpMethod = "POST"
    request.setValue("Bearer xln_test_YOUR_KEY", forHTTPHeaderField: "Authorization")
    request.setValue("application/json", forHTTPHeaderField: "Content-Type")
    request.httpBody = try JSONSerialization.data(withJSONObject: [
        "model": "llama-3-3-70b",
        "messages": [["role": "user", "content": question]]
    ])
    let (data, _) = try await URLSession.shared.data(for: request)
    let json = try JSONSerialization.jsonObject(with: data) as! [String: Any]
    let choices = json["choices"] as! [[String: Any]]
    let message = choices[0]["message"] as! [String: String]
    return message["content"]!
}

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Last updated: 2026-05-21