Introduction to Next.js + AI Beginner

Next.js has become the go-to React framework for building full-stack web applications. Combined with the Vercel AI SDK, it provides a complete platform for creating AI-powered apps with streaming responses, server-side AI processing, and edge deployment — all out of the box.

Why Next.js for AI Applications?

Next.js offers several unique advantages for AI development that set it apart from other frameworks:

Feature Benefit for AI Apps
App Router Server Components let you run AI logic server-side without exposing API keys to the client
Route Handlers Built-in API routes make it easy to create streaming endpoints for AI responses
Server Actions Call AI models directly from server functions without building separate API endpoints
Edge Runtime Deploy AI endpoints to edge locations for lower latency streaming worldwide
Streaming Native support for streaming responses with React Suspense and the AI SDK

The Vercel AI SDK

The Vercel AI SDK (also known as ai) is an open-source library designed specifically for building AI-powered user interfaces. It provides:

  • useChat — A React hook for building chat interfaces with automatic message management
  • useCompletion — A hook for text completion interfaces
  • streamText — Server-side streaming for text generation
  • generateText — Non-streaming text generation for server components
  • Provider abstraction — Switch between OpenAI, Anthropic, Google, and more with minimal code changes
Key Insight: The Vercel AI SDK is provider-agnostic. You can start with one LLM provider and switch to another by changing a single import — no need to rewrite your UI or streaming logic.

Architecture Overview

A typical Next.js AI application follows this architecture:

Text 
Client (React)              Server (Next.js)           AI Provider
+------------------+       +------------------+       +------------------+
| useChat hook     | ----> | Route Handler    | ----> | OpenAI / Claude  |
| Message UI       | <---- | streamText()     | <---- | Gemini / etc.    |
| Streaming render |       | Server Actions   |       |                  |
+------------------+       +------------------+       +------------------+
                            |                  |
                            | Edge Runtime     |
                            | (optional)       |
                            +------------------+

What You Will Build

Throughout this course, you will build progressively more complex AI features:

  1. A streaming chat interface

    Using the useChat hook and a route handler to create a real-time AI chat.

  2. Server-side AI with Server Actions

    Running AI operations securely on the server without exposing API keys.

  3. Generative UI with streaming

    Building interfaces where the AI generates React components on the fly.

  4. Production-ready patterns

    Error handling, rate limiting, caching, and deployment best practices.

Next.js + AI Ecosystem

The Next.js AI ecosystem includes several key packages:

Bash 
# Core AI SDK
npm install ai

# Provider packages (install the ones you need)
npm install @ai-sdk/openai      # OpenAI / GPT models
npm install @ai-sdk/anthropic   # Claude models
npm install @ai-sdk/google      # Gemini models

# Optional: UI components
npm install @ai-sdk/react       # React hooks (useChat, etc.)

Ready to Get Started?

In the next lesson, you will set up a Next.js project with the Vercel AI SDK and make your first AI call.

Next: Setup →
← Course Overview Setup →