OpenAI Dota

OpenAI’s Dota 2 bot defeated 99.4% of players in public matches

OpenAI Five — the AI-imbued bot designed by San Francisco, California-based research organization OpenAI that defeated a professional esports team at Valve’s Dota 2 earlier this month — became publicly playable last week via Arena, a mode that allowed players to challenge its game-playing abilities for themselves. So after a whopping 42,729 cooperative and competitive matches (688 of which were played against as many as 1,583 players simultaneously) between April 18 and April 21, how’d OpenAI Five perform? Impressively, claims OpenAI: It managed to win 4,075 games for a victory rate of 99.4%, which compared pretty favorably to the 24% win rate of human teams with at least 1 win.

In fact, it took 459 games for the first human player (out of the 39,356 total across 225 countries who played against OpenAI Five) to eke out a win — six hours and nine minutes into Arena’s launch.

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