Do you build it yourself?

I’m talking about how the story is written. You literally can’t define all of those choices in a prompt, it’s a continuous series of many many choices all throughout the story

I would disagree that a prompt is sufficient to express human intent, specifically in writing. How many stories can you list that don’t follow the heroes journey vs the ones that do? The most important part of any writing is not the setting and overarching narrative, it’s the small choices the author made all along the way that make it truly human. AI can parrot those choices, but a human can’t get an AI to make truly new unique decisions with any amount of prompting.

On the subject of tweaking the model, that’s not really how AI models work. Users don’t edit the model and keep the prompt the same to try to get different outputs. The only interface exposed to users is the input.