It was listed as 60 nights in an email from my Concierge the other day.
Doesn't matter to me, I've had 5 Kimpton and 1 Novotel stay so far this year in cities where there are full service Hyatts. 13 nights total, although if I was staying at Hyatts, five of them would have been award nights.
Just booked a five night trip between LA/SD. No revenue Hyatt nights.
It was a nice run. But I don't think I'll even make whatever the heck Platinum is now called given that I get SPG, Marriott and Hilton Gold from credit cards.