AI SDK, Next.js, and FastAPI Examples

These examples show you how to use the AI SDK with Next.js and FastAPI.

Prerequisites

Node.js 22, 24, or 26
pnpm 10 or later
Python 3.8 or later
macOS, Linux, or Windows Subsystem for Linux (the Python dependencies include uvloop, which does not support native Windows)

This example depends on local AI SDK workspace packages, so run it from a clone of the AI SDK repository instead of using create-next-app.

Clone the repository, or use an existing checkout:

git clone https://github.com/vercel/ai.git
cd ai

From the repository root, install dependencies and build the workspace packages:
```
pnpm install
pnpm build:packages
```
Change to the example directory:
```
cd examples/next-fastapi
```
Copy the example environment file and add an OpenAI API key:
```
cp .env.local.example .env.local
```
Create and activate a Python virtual environment:
```
python3 -m venv venv
source venv/bin/activate
```
Start the Next.js and FastAPI development servers:
```
pnpm dev
```

To learn more about the AI SDK, Next.js, and FastAPI take a look at the following resources:

AI SDK Docs - view documentation and reference for the AI SDK.
Vercel AI Playground - try different models and choose the best one for your use case.
Next.js Docs - learn about Next.js features and API.
FastAPI Docs - learn about FastAPI features and API.