I'm really curious what were the magic words.

> Alex had actually tried to brute force the hash earlier, but had downloaded a list of the top 10,000 most popular words to do it, which turned out not to be big enough to find it. Once he had a big enough word list, he got the answer.

They don't reveal the answer.

If I had to guess, “hot dog” would be the first thing I’d try. “Vegetable dog” was given as 0, and it may be alluding to a Silicon Valley episode.

If you want, you can enter your guess in the huggingface page for the puzzle:

https://huggingface.co/spaces/jane-street/puzzle

It's not "hot dog". I wrote in another comment how I found the solution but to give you a clue it is AI related.

not hot dog