I asked it to write the first chapter... It came back with 550 words, all perfectly OK and pretty much cogent, but it would suck as a chapter of an actual book

I asked it to write the first chapter... It came back with 550 words, all perfectly OK and pretty much cogent, but it would suck as a chapter of an actual book. Generally, it had at least two fatal flaws: (1) it was all cliche. I don't really mind cliche stuff for my walking-the-dogs audiobooks, but it can't be all cliche. There needs to be something in there. (2) it didn't delve into any details. E.g. there was an important planet, unexpectedly under attack, and a space battle for it. But nothing about why it was important and the space battle was over in a sentence or so. I prompted for more detail on these and got some, but again, it was purely cliche and contained no interesting details. Also, there was literally nothing following from the dynamic the premise suggests. With a bunch of prompting I think I could get it to write the book, but I think it would be purely cliche and bland, except possibly where I did some heavy lifting.