Dota 2 with Large Scale Deep Reinforcement Learning

On April 13th, 2019, OpenAI Five became the first AI system to defeat the world champions at an esports game. The game of Dota 2 presents novel challenges for AI systems such
as long time horizons, imperfect information, and complex, continuous state-action spaces, all
challenges which will become increasingly central to more capable AI systems. OpenAI Five
leveraged existing reinforcement learning techniques, scaled to learn from batches of approximately 2 million frames every 2 seconds. We developed a distributed training system and tools
for continual training which allowed us to train OpenAI Five for 10 months. By defeating the
Dota 2 world champion (Team OG), OpenAI Five demonstrates that self-play reinforcement
learning can achieve superhuman performance on a difficult task.


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