AI-assisted co-DM'ing personal novels

Curious to see and talk with others about using AI to dynamically write personal novels as a hobby, a form of choose-your-own-adventure where you can offload part of the creativity and majority of the grunt-work involved with writing onto the AI.

I started around half a year ago with Novel AI, yet when my stories would reach around the 15,000 word count the context management required due to the 2k token limit caused for a a net negative experience. A few months ago I experimented with ChatGPT at its 4k token limit, but the major cons of the limited ability to edit the content combined with the "always happy" bias hard-wired in made it short lived. That is until I discovered the variant site, Open AI Playground in Chat mode. It isn't free, but the first $5 are free as a trial. (And technically they mention it isn't for entertainment purposes and to use it responsibly)

Using the Playground I've written a 41,000, 23,000, and 21,000 (in-progress, plan is to hit 6 digits) word count personal stories/novels/adventures thus far. Using the co-DM system of bouncing with the AI to suggest creative alternatives (e.g. "List 10 twists that could occur next in the story"), adding creative embellishments (e.g. "Describe the city in detail, using epic high-fantasy influence"), and many other tips it's kept me hooked on some wild adventures across my favorite genre(s), tailored to me.

Edit:
OpenAI just released a GPT 3.5 Turbo 16k model for the Playground, lol. Absolutely obliterating NovelAI's 2k and the previous 4k limits. You could fit a significant portion of an entire novel and it'd take into account every sentence said. It'd probably take a pretty penny to use even half the context window, but could be useful for more critical moments of my novels.