The PlayStation 4 game Gran Turismo Sport challenges players to complete races as fast as they can - and now an AI can beat some of the world's best drivers
how to win. During training, GT Sophy, which was running on a separate computer, played the game on up to 20 PlayStation 4 consoles simultaneously.The team gave the AI the ability to accelerate, brake and steer, along with real-time information on the position of the cars in the game, including its own, and a map of the next 6 seconds of the track, which meant sight of a longer distance ahead when the AI travelled faster.
However, GT Sophy hit a stumbling block. The AI initially avoided overtaking fast opponents in order to minimise the risk of collision and maximise rewards. To overcome this overly safe behaviour, researchers rewarded the AI for passing opponents and penalised it for being overtaken.
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