Facebook AI Research today introduced ReAgent, a reinforcement learning toolkit for building decision-making AI that can receive feedback. ReAgent can assign scores to user actions and treat user input such as clicking on recommended content as training data.

ReAgent is a small C++ library available for download on GitHub designed to be embedded in any application. The toolkit comes with a set of decision-making AI models to get started, an offline module for model performance assessment, and a platform to deploy AI into production using the in PyTorch.

for deployment of large-scale models in production open-sourced by Facebook in November 2018, is now part of ReAgent.

ReAgent is currently being used to personalize billions of decisions a day at Facebook, like user notifications for

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