Coming Oct 18th, some DLC you can buy, but the massive update itself is FREE.
If you have been keeping up with GT5, you know Polyphony Digital has been very diligent about releasing free updates to improve the game, especially the online racing mode. Ever since the launch, Kazunori Yamauchi and his team have been carefully studying posts on forums, reading comments on PlayStation.Blog posts and across Twitter, talking to fans at events, and more. The game has evolved a lot since last November, thanks in part to the dedicated GT fans voicing their opinions.
Now I'm here to share with you some very exciting news about the biggest FREE update yet, releasing in the next few weeks. It will add new features and even more functionality to your GT5 experience.
Polyphony learned that a lot of fans out there love driving using the game's interior view, and has given some serious thought to it. With this new update, all cars in the game will now have interior views. Although the level of visual details will vary based on what car you choose, you can now race from behind the wheel of any car in the game. In addition, you'll be able to get the 2011 season versions of the 11 NASCAR race cars for the first time.
Some of the other improvements introduced are greatly reduced load times when loading races, quicker menu response times, and adjustable opponent AI in Arcade Mode. Players will now have the option to save their progress during lengthy racing events so they can come back and finish at a later time, and can also adjust weather conditions for races using a slider function that goes from mild to severe.
http://blog.us.playstation.com/2011/10/11/gran-turismo-5-spec-2-0-update-is-live-dlc-coming-october-18th/