Elon Musk's Dota 2 AI beats the professionals at their own game

Last week was the high point of the Dota 2 competitive year: it was the week of The International, Valve's biggest tournament. On Saturday, Team Liquid walked away with more than $10 million after defeating Newbee 3-0 in the grand final. Right now, one of the requirements to be a good Dota 2 player is that you've got to be a living, breathing human. The game does include some basic computer-controlled bots to practice against, but any seasoned player of the game should have no trouble prevailing over these bots, even on their hardest "Unfair" difficulty (though the Unfair Viper bot is a legendary jerk that's utterly miserable to play against). Last Friday, however, we got a hint of a new, altogether more threatening kind of computer-controlled player: an AI-controlled bot built by Elon Musk's OpenAI.