In this debut look at GTA Online, we're shown the new-found sense of freedom that players will have online. This multiplayer component is described as a "dynamic and persistent online world for 16 players that begins by sharing gameplay features, geography and mechanics with Grand Theft Auto V, but will continue to expand and evolve after its launch."
Form a crew to rob a bank or do the standard online multiplayer deathmatches, should that appeal to you. Customize your appearance, weapons, or vehicles. Buy an apartment. Design races with a content creator. Interact with and get new missions from non-playable characters. It's all sounding like an ambitious step up for Rockstar.
Curiously, GTA Online isn't coming out until October 1, 2013 -- a couple of weeks after Grand Theft Auto V's September 17 launch. So even though this isn't being treated as "GTA V multiplayer" so much as it is its own entity, it's worth pointing out that the mode will be free for everyone who owns a copy of the core game.