How do i upgrade from ps3 to ps4 for gta online?

Rockstar Games does not offer a free or paid upgrade from the PlayStation 3 version of Grand Theft Auto Online to the PlayStation 4 version. The PS3 and PS4 versions are treated as separate products, so players who want to continue their GTA Online experience on PS4 must buy the PS4 edition of Grand Theft Auto V. However, character progression can be transferred. To move your PS3 character to PS4, you need to link both your PS3 and PS4 copies of the game to the same Rockstar Social Club account. When you first launch the PS4 version, the game will prompt you to transfer your existing character data. This process moves your character level, money, vehicles, and properties, but it does not transfer any purchased in-game currency or downloadable content bought on PS3. The transfer is one-time and cannot be reversed, so make sure your PS3 character is in the state you want before initiating the migration. Note that the PS3 version of GTA Online has been discontinued, meaning no future updates or content will be released for it, which is another reason to move to PS4 if you want continued access to new features and content.