GTA Online Heists is a new mode which will officially launch tomorrow as a free update. However, some users have already posted screenshots with several details indicating that they prematurely received the update overnight. These users claim that the download size is a hefty 4.8 GB on the Xbox One but is relatively smaller on the Xbox 360 weighing in at 1.2 GB.
Hmm, Heist update spiked from 4.2 GB to 4.8 GB. Seems they're finalizing a few things pic.twitter.com/PrToCVq1Qi— V7X3 (@S7_V7X3) March 8, 2015
The long-awaited add-on includes five new heist missions along with an assortment of weapons, armored cars, costumes and masks. Nine achievements worth 250 gamerscore have also been added, amounting to a total of 1250 gamerscore. The missions include beating a heist without taking damage and spending in-game money on the new cars.
The previously revealed details regarding the free update also stated that before you begin a heist you will need a leader, who must own a high-end apartment with room for a planning board. The heist team can meet there and prepare. All four players are required to be rank 12 or above. Players will get rewards for completing heists, bonuses for completing the tasks in first person mode (PS4, Xbox One, or PC) and cash for achieving heist goals including timings, damage taken and accuracy.
With that being said, the update will officially launch on consoles tomorrow, so you'll have to wait a bit longer before you start robbing banks.