This year is the 10th anniversary. The past couple of years had tons of complaints on /r/adventofcode about how AI entries are dominating the leaderboards for most days. Today, o3 came out which performs extremely well of ARC and coding benchmarks.

NO: Advent of Code at adventofcode.com does not have a new set of 25 puzzles beginning Dec 1 2025

YES: Advent of Code still comes out, even if modified (such, as removing the leaderboard or having split leaderboards).