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    How to Get and Use the ChatGPT API

    How to Get and Use the ChatGPT API

    Learn how you can get and use the ChatGPT API key. This guide covers how to activate and utilize the API in your applications.

    ChatGPT, available at OpenAI’s website, is the leading method to interact with Artificial Intelligence. Since the release of version 3.5 in November 2022, it has become a global phenomenon, attracting over 100 million users worldwide.

    Another method to use large language model (LLM) is through the ChatGPT API key, also known as the OpenAI API key. Some services, require this key to operate. This article will guide you on how to create an account, generate an API key, and set up your service.


    The API can be used for various applications like SEO algorithms to enhance your website’s keywords, research assistance, language teaching, or idea generation. All these services primarily use OpenAI API endpoints, and the first step is setting up your key.

    The OpenAI developer platform is your starting point : . After clicking the ‘Sign up’ button, you can register for a free account and gain access to several advanced tools:

    • Language models: GPT-3.5 Turbo, GPT-4, GPT-4 Turbo
    • Fine-tuning models
    • DALL-E 2, DALL-E 3 – for generating images
    • Whisper – for transcribing speech
    • Sora – for generating video from text (not yet released)

    Registration gives you access to the OpenAI platform developer account, which includes API Keys, Settings, and Documentation. It’s also worth exploring other parts of the platform such as the Playground, Assistants, Fine-tuning, and Storage.

    How to get Chat GPT API key

    To begin using keys, ensure you have a positive balance in your billing account. Add your card in the Billing/Payment Methods section.

    gpt billing screenshot

    Payments operate on a ‘Pay as you go’ model. You can add credits by clicking ‘Add to credit balance’ or ‘Enable auto recharge’.

    chat gpt billing balance screenshot

    Once you have $5 charged (it is minimum amount for topping up), go to API keys and click ‘Create new secret key’.

    chat gpt api keys screenshot

    A moment later, you will see your key. Store this secret key securely and accessibly. For security reasons, you won’t be able to view it again through your OpenAI account. If you lose this key, you’ll need to generate a new one.

    save your chat gpt key screenshot

    How to use Chat GPT 4 API

    Suppose you are using an AI-related service. These often rely on the OpenAI API, and the control panel will have settings to add your own GPT-4 API key. This is where you paste it.

    For example, using the ‘AI Engine’ WordPress plugin by Jordy Meow, navigate to wp-admin / Meow Apps / AI Engine / Settings – API Key and enter your key.

    ai engine wordpress plugin settings

    Content Generation with use of OpenAI GPT API

    With the ‘AI Engine’ WordPress plugin, you can automatically generate any post. For example, a topic like “Tokyo, its main areas and attractions, one day tour for a first-time visitor. Simple vocabulary, short paragraphs.” Just click Generate. Generating a new post titled ‘Tokyo’s Must-See Spots: One Day Tour Guide’ costs us $0.0001 per request.

    ai engine content generator screenshot

    Another feature of OpenAI API is Generative AI, which can create images from prompts. For example, “Create an image showcasing steampunk architecture”. Wait a few seconds for the DALL-E 3 (HD) image, costing $0.02 per API usage.

    openai api generative ai screenshot

    How to use GPT 4 API with Your Application

    Having an API key means you can also incorporate AI into your own applications, which requires some programming skills. Here are some basic examples of what you can create.

    Create a Python application to generate a rap battle between two characters. You’ll need to write a script that uses the OpenAI API to process your text input and generate creative, engaging dialogue. This can be a fun way to experiment with the capabilities of GPT-4 in generating unique and entertaining content.

    from openai import OpenAI
    client = OpenAI()
    response =
          "role": "user",
          "content": "Write a rap battle between Alan Turing and Claude Shannon."

    Develop a JavaScript application to create interview questions. This tool can be particularly useful for HR departments or recruiters looking to streamline their interview process. By leveraging the OpenAI API, the application can produce relevant and insightful questions based on the job description and candidate’s profile.

    import OpenAI from "openai";
    const openai = new OpenAI({
      apiKey: process.env.OPENAI_API_KEY,
    const response = await{
      model: "gpt-3.5-turbo",
      messages: [
          "role": "user",
          "content": "Generate a list of 10 interview questions specifically tailored for a mid-level React developer. These questions should assess both technical skills and problem-solving abilities appropriate for this level of expertise."
      temperature: 0.5,
      max_tokens: 64,
      top_p: 1,

    These examples show just a small glimpse of how the OpenAI API can be used to enhance and innovate within various fields and applications. Whether for fun, educational, or professional purposes, integrating GPT-4 into your projects can provide significant benefits and open up new possibilities.

    GPT-3.5 or GPT-4

    When it comes to choosing between GPT-3.5 and GPT-4 for your applications, understanding the capabilities and differences of each model is key. GPT-3.5, released prior to GPT-4, is a robust and reliable choice for a wide range of tasks involving natural language understanding and generation. It is particularly suitable for applications that don’t require cutting-edge multimodal capabilities and is also more budget-friendly, making it an ideal option for startups and individuals who need high-quality text generation without the higher cost.

    A significant advancement occurred in March 2023 with the public release of a new AI model called GPT-4. This model is more powerful and multimodal, capable of analyzing text, images, and voice. With your API key, you gain universal access to all models available on the OpenAI platform. In your applications, you can select the latest model, such as GPT-4 Turbo, and utilize the most advanced large language model (LLM) from OpenAI.


    Obtaining and using the ChatGPT API key is straightforward and opens up many possibilities. Remember that the billing model is prepaid, so you need to top up your account first. The OpenAI key offers a suite of opportunities to explore AI, whether as a hobby or professionally.

    Now when you know how to get chat gpt api key, imagine integrating advanced AI features into everyday applications, transforming mundane tasks into exciting AI-driven interactions. From personal blogs and educational tools to complex business solutions, the potential is only as limited as your creativity.

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