If you want to play with GPT-3, you can do so right now.
Go to https://play.aidungeon.com Make an account, and select the "Dragon" model. That's GPT-3.
I've spent ten hours playing with it over the last two days. It isn't perfect, and it feels short of the hype it's generating about itself, but it's an amazing leap nonetheless. It really seems to have an understanding of causality, biology, all sorts of fictional themes...
It isn't perfect. You frequently have to back it up and try again. Unless you make good use of the site's long-term memory function, it'll forget anything that happened over a page ago, and a lot of the time its idea of what should happen next doesn't match the plot I had in mind. I'm getting better at that.
However, as a writer myself, I can say that this is just as true for human writers as well. For every final draft you see there are ten discarded ones, and a hundred that never made it to paper.
Viewed that way, GPT-3 is actually much better at the core part of writing than I am! It's more creative, it uses English better, it's better at matching the narration to the characters than I am...
It's just that this isn't enough. It's missing a full model of the world, and it doesn't know how to look at what it's written and decide if it matches its intent, or whether it'll break consistency or get in the way later.
It doesn't have an intent. It doesn't know about consistency.
But that's also true for that part of me.
GPT-3 isn't a human-level writer. What I've determined, however, is that it's a huge part of one, and it's more than good enough to fulfill the role of that part already. Now we just need the other nine tenths.