Your Simple Guide to use ChatGPT via the OpenAI API

Mar 1, 2024

ChatGPT is a state-of-the-art language model developed by OpenAI. It serves many purposes in natural language processing, including language translation, chatbots, and story writing, among others.

This guide describes how to utilize ChatGPT through the OpenAI API service on macOS operating systems. Additionally, it provides instructions for interacting with ChatGPT using Python.

Connect to ChatGPT via API

To set up ChatGPT API follow these instructions:

1. Set up an API Key Sign up to OpenAI and follow the indications to create a new secret key. All your API requests must include this API Key in the Authorization HTTP header of the request.

Important:
Keep in a safe location your new secret key. For security reasons, you won’t be able to retrieve it again; thus, you’ll need to generate a new one.

2. Open terminal

3. Start making some requests using the OpenAI API client and your API Key. For further information, refer to Making Requests.

   To request all available models, use the following request:

   curl https://api.openai.com/v1/models \
   -H "Authorization: Bearer <YOUR_API_KEY>"
   

   To retrieve information about the text-davinci-003 model, use the following request:

   curl https://api.openai.com/v1/models/text-davinci-003 \
   -H "Authorization: Bearer <YOUR_API_KEY>"
   

   To make a completion, use the following request:

   curl https://api.openai.com/v1/completions \   
   -H "Content-Type: application/json" \   
   -H "Authorization: Bearer <YOUR_API_KEY>" \   
   -d '{
       "model": "text-davinci-003",
      "prompt": "Say this is a test",
      "max_tokens": 7,
      "temperature": 0
    }'
   

Use ChatGPT with Python

This section describes how to set up ChatGPT and use it in your Python scripts.

Prerequisites

Ensure you comply with the following requirements before you continue:

• Set up an API Key
• Install Python version 2.7 or later To check your current Python version, type the following command in the terminal python3-version

Set up ChatGPT with Python

To integrate ChatGPT with your Python scripts:

1. Open terminal

2. Create a new empty project folder:

   mkdir chatgpt-python
   cd chatgpt-python
   

3. Install the OpenAI Python library:

   pip3 install openai
   

4. Create a new file chat.pyin the project folder and edit its content:

   touch chat.py 
   nano chat.py
   

5. Create a completion request sample using the following template:

   import openai
   
   # Set up OpenAI API client
   openai.api_key = "<YOUR_API_KEY>"
   
   # Set up OpenAI model and prompt
   model = "text-davinci-003"
   prompt = "Hello, how are you today?"
   
   # Generate a request
   completion = openai.Completion.create(
       engine=model,
       prompt=prompt,
       max_tokens=1024,
       n=1,
       stop=None,
       temperature=0,
   )
   
   response = completion.choices[0].text
   print(response)
   

6. Save the chat.pyfile.

7. Make the completion request by running the chat.pyscript.

   python3 chat.py
   

   You get the following sample response:

   I am doing well, thank you. How about you?
   

   Refer to Making Requests for additional information.

Trusting this comes in handy for you!