Open Source · mobile

Use DeepSeek V3 with Swift (iOS)

Updated 2026-05-21 · By XALEN

How to use DeepSeek V3 (Open Source, 671B (37B active)) with Swift (iOS). Install, authenticate, and make your first API call in minutes. Working code example included.

Model
DeepSeek V3
671B (37B active) · 128K context · $0.05 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": "deepseek-v3",
        "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"]!
}

DeepSeek V3 with Other Frameworks

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Last updated: 2026-05-21