Sure! Below is a step-by-step guide to creating a simple Next.js application that connects to OpenAI's GPT API. The app will feature a basic chat interface where users can input prompts, send them to the API, and display the responses.

Table of Contents

1. Prerequisites
2. Step 1: Initialize the Next.js Project
3. Step 2: Install Required Dependencies
4. Step 3: Set Up Environment Variables
5. Step 4: Create the API Route
6. Step 5: Build the Chat Interface
7. Step 6: Run the Application
8. Complete Code Overview

Prerequisites

Before you begin, ensure you have the following installed on your machine:

• Node.js (v14 or later)
• npm or yarn
• An OpenAI API Key. You can obtain one by signing up at OpenAI.

Step 1: Initialize the Next.js Project

First, create a new Next.js project. You can use create-next-app for this purpose.

npx create-next-app@latest next-gpt-chat