Facebook open-sources its Horizon AI platform

If you could crack open Facebook and see the gears turning under the social network's face, you'd find a surprising amount of artificial intelligence being applied in all sorts of ways. As of today, the company is pulling back the curtain and making Horizon -- the company's end-to-end applied reinforcement learning platform that helps fine-tune that AI -- open source. Reinforcement learning is a commonly used tool in machine learning to teach a wanted behavior. It works by rewarding desirable behaviors while discouraging undesirable ones. Facebook has used Horizon in a number of its applications in an attempt to better serve its users.