Anyone know how many months they give you on purchasing MacStudio M1 Max with your apple card?

Technically until you finish paying off the purchase. The Apple Card installments are based on 12 months however. The price of the purchase is divided into 12 equal payments. At month 12 if you have kept up with the payments you will have paid off the device entirely.

You don't get x amount of months for 0% and then other months with interest. It's 0% for the entirety of the 12 months the monthly installment program is for.

Different devices offer a different number of months.

For Macs it's 12 months, for iPhones and Apple Watches for example it's 24 months.

The 0% interest applies through the entire time frame for the purchase.

See here for specifics ➜ Products you can buy with Apple Card Monthly Installments - Apple Support