OpenAI’s official Next.js wiring for the Assistants API

What it does

This is the house-brand starter kit for the OpenAI Assistants API in Next.js. It provides a chat interface and backend routes that handle streaming responses, function calling, file search, and code interpreter. In short, it is the plumbing you would otherwise have to write yourself.

The interesting bit

Rather than splitting features across separate apps, the template enables every tool on a single assistant and exposes each capability through its own demo page. The Chat component and its CSS are explicitly framed as copy-pasteable artifacts, which tells you exactly how OpenAI expects thread lifecycle and streaming to be structured in a React app.

Key highlights

• Demonstrates streaming, function calling, file search, and code interpreter in one template.
• The Chat component in app/components/chat.tsx is portable: lift it and its CSS into your own project.
• Backend routes cover the full thread lifecycle—creation, messaging, action callbacks, and file CRUD.
• Deploys to Vercel or any platform that supports Next.js.

Verdict

Use this if you want a working diagram of how Assistants API streaming and tool use fit together in Next.js. Skip it if you need a production-ready chat product; this is scaffolding, not a finished build.