Passage: As with previous titles in the series, players have the opportunity to develop and improve their characters by defeating enemies and acquiring items, though the traditional experience point system is replaced by a new system called the "Sphere Grid". Instead of characters gaining pre-determined statistic bonuses for their attributes after leveling up, each character gains "Sphere Levels" after collecting enough Ability Points (AP). Sphere Levels allow players to move around the Sphere Grid, a pre-determined grid of interconnected nodes consisting of various statistic and ability bonuses. "Spheres" are applied to these nodes, unlocking its function for the selected character.The Sphere Grid system also allows players to fully customize characters in contrast to their intended battle roles, such as turning the White Mage-roled Yuna into a healer and the swordsman Auron into a physical powerhouse. The International and PAL versions of the game include an optional "Expert" version of the Sphere Grid; in these versions, all of the characters start in the middle of the grid and may follow whichever path the player chooses. As a trade-off, the Expert grid has fewer nodes in total, thus decreasing the total statistic upgrades available during the game.

Question: The new point system for the series is called what?
Sphere Grid