on Jane Friedman site:

The debate over using AI in the writing process is far from settled, but as the conversation continues to develop, we can all agree that better information helps us make better decisions. With that in mind, I set out to test a variety of AI-powered editing tools for myself.

While I wholeheartedly believe humans make the best editors, I know economic realities can make hiring an editor difficult or impossible, and many writers don’t have skilled critique partners or a helpful writing group. For these reasons and more, AI is an attractive alternative. Not all of these AI tools are created equal, however, and writers should approach any addition to their process with a shrewd eye.

To more objectively gauge the abilities of various AI tools, I took a fantasy short story and performed developmental, line editing, and copyediting on it, then compared my edits with the feedback generated by different AI-powered editing platforms. To round out the review, I also considered other criteria, such as user experience and external factors like the terms of service and how users’ work is stored. For copyediting tools, I specifically evaluated Grammarly, Hemingway Editor, ProWritingAid, and AutoCrit.