What is ChatGPT? ChatGPT from OpenAI is a tool built large language models and "is fine-tuned .... with both supervised and reinforcement learning techniques." Wikipedia.
Currently, ChatGPT is free to use if demand is low, with standard response speed, using regular model updates. Go to https://chat.openai.com/ Look for the “Try me” button. Sign up with an email address. Once you are in ChatGPT, you can put in a prompt, review the output, and then ask for changes in “conversation” with the AI. Another option: If Chrome is your browser and you have a Google account: Try the ChatGPT Chrome extension and log in with a Google account. Consider reading ChatGPT's FAQ - especially concerning personal privacy.