Le Chat by Mistral AI

The app demonstrates real-time chat interactions powered by Mistral AI.

Watch Demo Video

Features

• Real-time chat interface with stream-based responses
• Powered by Mistral AI Large model
• Cross-platform (iOS & Android) support
• Dark mode theme
• Multi-language support (English, French)

Downloads

• Android APK
• iOS Build

Setup

Prerequisites

• Node.js (v16 or higher)
• Expo CLI
• Mistral API key

Backend Setup

The backend is a simple Vercel Edge Function that integrates with Mistral AI:

import { streamText } from "ai";
import { mistral } from "@ai-sdk/mistral";

export const config = { runtime: "edge" };

export default async function handler(req: Request) {
  if (req.method !== "POST") {
    return new Response(JSON.stringify({ message: "Method not allowed" }), {
      status: 405,
      headers: { "Content-Type": "application/json" },
    });
  }

  try {
    const { messages } = await req.json();
    const result = streamText({
      model: mistral("mistral-large-latest", { safePrompt: true }),
      messages,
    });
    return result.toDataStreamResponse();
  } catch (error) {
    return new Response(JSON.stringify({ message: "Internal server error" }), {
      status: 500,
      headers: { "Content-Type": "application/json" },
    });
  }
}

1. Clone the backend repository
2. Install dependencies:

npm install

3. Create a .env file with your Mistral API key:

MISTRAL_API_KEY=your_api_key_here  # Get it from https://console.mistral.ai/api-keys/

For more information about the Mistral AI integration, check the Vercel AI SDK documentation.

4. Deploy to Vercel or run locally:

vercel dev

Mobile App Setup

1. Clone this repository
2. Install dependencies:

npm install

3. Create a .env file:

EXPO_PUBLIC_API_BASE_URL=https://your-backend-url.vercel.app

4. Start the development server:

npx expo start

Architecture

The application uses a simple client-server architecture:

• Frontend: React Native with Expo
• Backend: Vercel Edge Functions with Mistral AI integration

Roadmap

• End-to-end testing with Maestro
• Enhanced accessibility features
• Error tracking (Sentry/Firebase Crashlytics)
• Analytics implementation

License

MIT License