Like many people, I've been experimenting with AI and using it for my own personal needs, for example as a way to summarize search results or as a more personalized recommendation engine for entertainment. I have also used it for professional use in my capacity as a programmer to write and maintain parts of the software my business maintains, with encouragement from my employer and coworkers.
That said, I also have a desire to become a published writer of fiction, and in that context I know that there is generally a feeling of discontent, if not outright outrage, among the author population regarding the unparalleled amount of model training that was done using copyrighted materials without permission or compensation. While I do not feel the same degree of outrage that most authors do, I do agree that authors deserve to have more control or at least appropriate compensation for this usage.
Currently, I do not think generative AI is competent enough to replace professional authors for long-form fictional works, at least not to the same level of quality, and I think there is a certain amount of wariness among both authors and the general population regarding AI-written works, often even accusing authors with a certain writing style of using AI to write for them. I've been on the receiving end of such accusations in the past due to my relatively formal writing style, even in very informal settings like chatrooms...
Because of that, I do not want to use any output of generative AI directly in my writing, whether that is to write, rewrite, edit, proofread or otherwise directly interact with any of my own writing present in the final work. I want the final text to be entirely conceived by a human brain and written by human hands, such that I can say "this work is not written by AI".
That said, during an earlier stage when I was still exploring AI, I have used AI (more specifically ChatGPT) for generic market research purposes. More precisely, I have given it an high level summary of the world I've built, the type of story I want to tell in that world, initial WiP details of some characters and a 1 sentence plot outline, with the goal of finding other works of fiction with shared properties.
During this research, I also asked and received general advice on interactive narrators, something I find intriguing and want to integrate into the finished work. These 2 questions are research I could have done through traditional search engines as well, but my experience is that over the past couple of years, search engines have been rapidly deteriorating in quality due to overzealous SEO of sites, increasing frequency of subscription walls, and engine scope creep.
I'm curious whether this limited use of AI for research, both in amount and scope, could be considered enough for a reasonable person to say that a particular work "was written by AI". I personally don't think it is, but I also tend to have a narrow "letter of the law" interpretation to such things. I can definitely see a professional author with a ferocious opposition to AI consider this as partly written by AI...