The AI’s I use like Claude, Deepseek, Grok, and Chat GPT all write in a away that isn’t actual story writing. They usually summarize thing’s, have character’s be omniscient and know past or future events they shouldn’t know, always talk expectantly, give unnecessary sensory and environmental details and it definitely can’t set up a mystery or write a specific genre like comedy. They keep over clarifying as well what something isn’t or is along with even saying what I said not add directly.
I need AI that are at least capable of writing more humanly and following what you tell it. Idk why there isn’t any actual AI built for writing , story writing not essay or school writing. Most can critic something pretty well but can never implement those fixes they suggest. I usually upload my fic through PDF for the AI read . It gets things of what chapter is what at times wrong or completely be unable to remember a chapter ending or the actual one.
Ah yeah context and token limits are gonna hold you back. Opus output is more than output large chapters, but you’ll probably get the best results by prompting via API (command line/CLI). You can set max output limits and provide files for RAG. You also might need to upgrade to a plan that can handle marathon sessions better like Claude Max. Claude is also better for creative writing apparently. Good luck!