Here's a much better analysis from someone who got 45 stars using LLMs. https://www.reddit.com/r/adventofcode/comments/1hnk1c5/resul...
All the top 5 players on the final leaderboard https://adventofcode.com/2024/leaderboard used LLMs for most of their solutions.
LLMs can solve all days except 12, 15, 17, 21, and 24