The AI being fielded was dubbed the OpenAI Five, and it took on Team OG, the winners of last year’s The International 8. In a best-of-three game, the OpenAI Five won 2-0. That said, the games had some additional rules in place; illusions and summoned units were disabled, as these were elements the OpenAI hadn’t trained for.

— Greg Brockman (@gdb) April 13, 2019 Like all the other AIs being made to play Dota 2, the OpenAI Five makes use of deep reinforce learning to better itself. In other words, the AI plays against itself in an accelerated virtual environment, finds out what works and what doesn’t, and improves itself from there. This particular AI has existed for 10 months and has played over 45000 hours of Dota 2 – a little over five years’ worth of Dota 2.

Sign up today! Very excited to see what we learn from observing OpenAI Five in the wild. pic.twitter.com/TaMhxdgVIt — Greg Brockman (@gdb) April 13, 2019 The OpenAI exhibition matches last weekend was the last of its public demos. On the flip side, you can now sign up for matches with or against the OpenAI five. Registrations are open, with the games taking place from 9pm of 18 April to 3pm of 22 April, 2019. (Source: OpenAI, The Verge)