2023-04-30: Added chat history persistence with sessions
2023-04-23: Upgraded to the streaming version of the API (output token-by-token!)
2023-03-16: The PHP version of the chatbot has been updated to the ChatGPT model!
This ChatGPT-like chatbot was made using the OpenAI API for a YouTube video I made. You can watch the original video here: https://www.youtube.com/watch?v=ru5m-BKDn6E
Video of update to ChatGPT API: https://www.youtube.com/watch?v=0NrIv6bI5o4
There is a PHP, HTML, JS + CSS version that you can open in the browser. The entry point for this version is php/index.html. It will send requests to message.php to get the response from the OpenAI API.
The PHP version uses the gpt-3.5-turbo engine which is the ChatGPT engine.
There is a simple Python version of the chatbot in python/chat.py. You can run it from the command line and it will ask for a question and then give you an answer. You can exit by typing exit as the question (or with Ctrl+C)
The Python version uses the text-davinci-003 engine. It was made in the first version of the repo, and since abandoned (at least for now)
You will need an API key from OpenAI to use the code. The API key must be added to the settings.sample.php file, which you will need to rename to settings.php.
In the Python version The API key must be put in a file called api_key.txt in the same folder as the script.
You can change the system message in the PHP version and the default prompt and default questions and answers in the Python version to make the chatbot do what you want. For example you can add a product / website documentation as the default prompt / system message and it will be able to answer questions based on the documentation.
Note that a long documentation or a long question will use up more tokens and therefore cost more. There is also a limit for the amount of tokens you can use in one request.
If you like this code or use it in some useful way, consider buying me a coffee: https://www.buymeacoffee.com/unconv