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Creating an AI-Powered Chatbot with GPT 3.5 Turbo and Node.js

Author: Under CtrlTime: 2024-02-12 11:25:01

Table of Contents

Introduction to Chatbots with GPT 3.5 Turbo

Chatbots have become increasingly popular in recent years thanks to advances in artificial intelligence. One of the most exciting new developments is OpenAI's GPT 3.5 Turbo model. This model builds on the conversational abilities of GPT-3, while being optimized for chatbot applications and priced at a fraction of the cost.

In this post, we'll explore building a chatbot with GPT 3.5 Turbo and Node.js. We'll cover setting up a Discord developer account, integrating the GPT 3.5 API, and programming our bot to listen and respond to users in Discord.

Overview of Chatbot Capabilities with GPT 3.5

GPT 3.5 Turbo allows us to create chatbots that can engage in natural conversations on a wide variety of topics. The large model size and training on dialogue gives it human-like conversational abilities. Our chatbot will be able to respond to open-ended user prompts, maintain context during long conversations, and exhibit a fun, quirky personality.

Benefits of the GPT 3.5 Turbo Model

Compared to GPT-3, GPT 3.5 Turbo is optimized specifically for dialog applications like chatbots. It achieves state-of-the-art performance on the Dialogue Accuracy SQuAD benchmark. Additionally, GPT 3.5 Turbo is priced starting at just $0.002 per 1k tokens, which is around 10x cheaper than GPT-3. This makes it feasible to build chatbots accessible to everyone.

Setting up a Discord Developer Account

To build our chatbot, the first thing we need is a Discord account for it. Discord provides a free developer platform that makes it easy to get started.

We'll walk through creating a Discord bot user, configuring permissions, and adding it to our server.

Creating a Discord Bot

Head to the Discord developer portal and create a new application. Give your bot a name, avatar, and username. Then go to the Bot tab, and click "Add Bot". This will generate a token that we'll use later to login and connect the bot.

Configuring Bot Permissions

Under the OAuth2 tab, choose the bot scope and permissions you want. For our bot, we only need permissions to send messages. Finally, generate the invite URL and add the bot to your test server.

Integrating OpenAI's GPT 3.5 Turbo

With our Discord bot set up, it's time to integrate the OpenAI API. This will allow us to tap into the power of GPT 3.5 Turbo to generate conversational responses.

We'll go over getting an API key from OpenAI, and configuring our app to connect with their API.

Obtaining an API Key

Head to platform.openai.com and sign up for a free account. Under API Keys, create a new secret key. This will give us access to test out the API with 18 dollars of free credit.

Implementing the Configuration

In our Node.js app, we'll import the openai package, and instantiate the Configuration class with our secret key. This configuration will be used to initialize the OpenAI object that can call the API.

Building the Chatbot in Node.js

Now for the main event - programming our Discord chatbot using Node.js and OpenAI's API.

We'll listen for new messages, pass them to GPT 3.5 Turbo to generate responses, and send the bot's replies back to Discord.

Importing Required Packages

We'll need the discord.js library to integrate with Discord, and openai for the API wrapper. Dotenv will also be useful for managing our secret keys and tokens.

Listening for Messages

Using discord.js, we can listen for the messageCreate event to detect new messages. We'll check that it's not from a bot and not a command. Then we'll fetch previous messages in the channel for conversation context.

Generating Responses with GPT 3.5 Turbo

We'll construct the conversation log array with the message history and new prompt, and pass it to openai.createChatCompletion(). This will hit the GPT 3.5 Turbo model to generate a conversational response for our chatbot to say.

Enhancing Chatbot Conversations

With basic messaging working, we can add some niceties to improve the conversational user experience.

This includes typing indicators and expanding message history for better context.

Adding a Typing Indicator

Before hitting the OpenAI API, we can make the bot display a typing indicator to let the user know it's working on a response. This improves perceived performance compared to just showing responses.

Fetching Previous Messages for Context

Instead of just using the last prompt, we can fetch up to 15 previous messages to add more context. Our bot will use this message history in the conversation log for a more natural, contextual dialogue.


And that's it! We now have a Discord chatbot powered by the cutting-edge GPT 3.5 Turbo model from OpenAI.

The bot can engage in natural conversations on arbitrary topics thanks to the knowledge and conversational abilities of the large language model.

In future posts, we may explore deploying the bot and adding more advanced features like slash commands. But this covers the basics of building an AI chatbot with OpenAI's API.


Q: How much does the GPT 3.5 Turbo model cost?
A: The GPT 3.5 Turbo model is 10 times cheaper than OpenAI's previous DaVinci model, making it very affordable to use.

Q: What permissions should my Discord bot have?
A: Only provide your Discord bot with permissions to send messages to prevent potential abuse from other users.

Q: How can I make my chatbot hold conversations?
A: Fetch previous messages to provide context and track the conversation based on the author's user ID to maintain a dialogue.

Q: What Node.js packages do I need?
A: You need to import the discord.js package to interface with Discord and the openai package to leverage the GPT 3.5 Turbo model.

Q: Can I customize my chatbot's personality?
A: Yes, you can provide custom guidance in the initial social context to make your chatbot sarcastic, friendly or have any personality you desire.

Q: How do I ignore bot messages?
A: Check if the message author is a bot and return to avoid processing messages from other bots.

Q: What code editor should I use?
A: Visual Studio Code is a great free code editor for building Discord bots with Node.js.

Q: How long does it take to build the chatbot?
A: With the provided detailed tutorial, you can have your own AI-powered Discord chatbot up and running within an hour.

Q: Can I see a live demo?
A: A live demo is available in the creator's Discord server for you to test out the chatbot capabilities.

Q: Where can I get help with my code?
A: Be sure to join the creator's Discord server and ask questions in the discord.js channel to get help.