Vercel AI SDK, Next.js, LangChain, OpenAI Chat Example

This example shows how to use the Vercel AI SDK with Next.js, LangChain, and OpenAI to create a ChatGPT-like AI-powered streaming chat bot.

Deploy your own

Deploy the example using Vercel:

How to use

Execute create-next-app with npm, Yarn, or pnpm to bootstrap the example:

npx create-next-app --example https://github.com/vercel/ai/tree/main/examples/next-langchain next-langchain-app

yarn create next-app --example https://github.com/vercel/ai/tree/main/examples/next-langchain next-langchain-app

pnpm create next-app --example https://github.com/vercel/ai/tree/main/examples/next-langchain next-langchain-app

To run the example locally you need to:

1. Sign up at OpenAI's Developer Platform.
2. Go to OpenAI's dashboard and create an API KEY.
3. Set the required OpenAI environment variable as the token value as shown the example env file but in a new file called .env.local.
4. pnpm install to install the required dependencies.
5. pnpm dev to launch the development server.

Learn More

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

• Vercel AI SDK docs - learn mode about the Vercel AI SDK
• Vercel AI Playground - compare and tune 20+ AI models side-by-side
• LangChain Documentation - learn about LangChain
• OpenAI Documentation - learn about OpenAI features and API.
• Next.js Documentation - learn about Next.js features and API.