I wonder how helpful GPT-3 and Copilot will be for this :) Not necessarily to solve the whole puzzle but rather to give hints when I'm stuck with a particular task.
Last years I started around the 14th and Copilot auto completed the solutions for all the old problems from basically just the file name. I created a file called 'advent_of_code/1.py' typed 'def main()' and Copilot did everything else.
Last year when I was doing AoC in Go, I was pleasantly surprised how good Copilot is and it felt like magic. Given most of the time I use Terraform, YAML, JSON, jq, and Bash these days, I can't really appreciate Copilot, but last year I did!
I ended up turning off Copilot last year since it was literally giving me complete correct solutions with no effort on my part. Kind of took the fun out of it.
I can't say it gave me complete solutions, but it really guessed my intent most of the time and saved me typing time so that I could come close to the winners who predominantly use Python.