How to Use ChatGPT from a Node App

October 22, 2023

In this tutorial, we will be showing you how to easily integrate ChatGPT into a node application by using their node library.

ChatGPT can be integrated into a Node.js app to provide a conversational interface to users. Here are some potential use cases for ChatGPT in a Node.js app:

Customer support: By incorporating a conversational interface, a Node.js app can provide an automated customer support system that can address common issues and questions in real time.
Personal assistant: A conversational interface within a Node.js app can serve as a personal assistant, assisting users with scheduling, reminders, and other tasks.
Language translation: A Node.js app can utilize a conversational interface to provide language translation services, allowing users to enter text in one language and receive translations in real-time.
Content recommendation: A conversational interface can be used to provide tailored content recommendations within a Node.js app, based on user preferences and behavior.
E-commerce: A conversational interface can enhance the shopping experience in an e-commerce Node.js app, providing users with product recommendations and answering questions related to orders, shipping, and returns.
Education: A Node.js app can integrate a conversational interface to provide educational resources and assistance to users, allowing them to ask questions and receive relevant information and resources.

Overall, the possibilities of using ChatGPT in a Node.js app are endless. With its natural language processing capabilities, it can help make interactions with users more seamless and engaging.

Step 1-) Install Package

Run the installation in the command line:

> npm install openai

Step 2-) Run the Code

In this example, we are simply running a function that sends a prompt and gets a response shown here:

const { Configuration, OpenAIApi } = require("openai");
const configuration = new Configuration({
    apiKey: <your api key>,
});
const openai = new OpenAIApi(configuration);


async function generateText() {
    const completion = await openai.createCompletion({
      model: "text-davinci-003",
      prompt: "How to create a simple node app",
      max_tokens: 4000,
    });
    console.log(completion.data.choices[0].text);
}
    
generateText()

You can generate an API key here. Be careful to keep this as secret as possible. Initially using the API key is free, but you will need to start paying for continued access. If someone else gains access to the key, you can risk losing money for overuse of the API.

In this example, we use the createCompletion, which is a function provided by the OpenAI API package for Node.js that allows you to generate text completions using the GPT-3 language model. We can pass in max_tokens to get the full response. The smaller the number of tokens, the more the response will be truncated (not ideal). However, it is more intensive for the API to give you the full number of tokens and there is a limit.

This is the simplest way you can use ChatGPT with Node and there are many more parameters you can pass to the model, other types of models more appropriate for other purposes, and not to mention other methods that can be used as well. It is all in their documentation.