General Admission is $25 for adults. https://rsecure.metmuseum.org/admissions/tickets
You can decide how much you want to pay if you are a New York State resident or a student from the area. The link provided by Raul has all the details.
Military is free. All you have to do really is give a donation
General admission ticket Adult $ 25 Senior (Age 65+) $ 17 Student $ 12 Child $ 0
Thanks! Your answer is awaiting moderation.