Is it OK to use AI-generated images?

I'm curious about the ethics and legality of using AI-generated images. Can you tell me if it's okay to use these images in various contexts, such as commercial projects, social media posts, or even as artwork? Do we need to obtain permission from the AI's creators or any other parties before using these images? Additionally, what are the potential risks or drawbacks of relying on AI-generated images for our purposes?