If AI is used in the creation of an educational document, the proper citation to recommend to your class is:
OpenAI. (2023). ChatGPT (Current Date version) [Large language model]. https://chat.openai.com/chat
Include the version date or specific version number if applicable (e.g., "December 17 version").
Always check with your institution or instructor for additional guidance on citing AI tools, as conventions are still evolving.