Gemini (Google) vs ChatGPT (OpenAI) Comparación

// API de Gemini — integración con Swift
import GoogleGenerativeAI

let model = GenerativeModel(
    name: "gemini-2.5-pro",
    apiKey: APIKey.default
)

// Multimodal: imagen + texto
func analyzeUIScreenshot(_ image: UIImage, prompt: String) async throws -> String {
    let response = try await model.generateContent(image, prompt)
    return response.text ?? "No se obtuvo respuesta"
}

// Respuesta en streaming
func streamCodeReview(code: String) async {
    let stream = model.generateContentStream(
        "Revisa este código Swift y sugiere mejoras:\(code)"
    )
    for try await chunk in stream {
        print(chunk.text ?? "", terminator: "")
    }
}

// API de OpenAI — integración con Swift
import OpenAI

let client = OpenAI(apiToken: "API_KEY")

// Chat Completions
func askChatGPT(question: String) async throws -> String {
    let query = ChatQuery(
        messages: [.init(role: .user, content: question)],
        model: .gpt4_o
    )
    let result = try await client.chats(query: query)
    return result.choices.first?.message.content?.string ?? ""
}

// Vision: análisis de imagen
func analyzeImage(url: String, prompt: String) async throws -> String {
    let imageContent = ChatQuery.ChatCompletionMessageParam.Content
        .vision([.imageUrl(.init(url: url)), .text(prompt)])
    let query = ChatQuery(
        messages: [.init(role: .user, content: imageContent)],
        model: .gpt4_o
    )
    let result = try await client.chats(query: query)
    return result.choices.first?.message.content?.string ?? ""
}