The OpenAI bots this weekend beat high-profile former Dota players Ben "Merlini" Wu, William "Blitz" Lee, Ioannis "Fogged" Lucas, as well as current pro player David "MoonMeander" Tan and play-by-play commentator Austin "Capitalist" Walsh. They rallied in the second game where they managed to take down at least one tower, before moving on to the third game where the human players managed to cinch a win. Nevertheless, it is still up for question if OpenAI Five can beat the best players in the game at The International later this month. The nonprofit research lab employed a scaled-up version of Proximal Policy Optimization running on 256 GPUs and 128,000 cores, a similar setup used in last year's bot which dominated in 1-vs-1 Dota 2 matches. Using a separate LSTM for each hero and no human data, it learns recognizable strategies.
The only possible bright point was that OpenAI let the final match composition be chosen by the audience, meaning the audience stepped in to vote for which heroes OpenAI would control.
A few years ago, many researchers thought it was impossible for AI systems to get so good at complex team-based games like Dota 2, but here we are.
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At a recent battle between the human players and the team of bots, the team of human players managed to win just one game from the artificially intelligent bot, CNET reported. It was, however, given five invulnerable couriers-though it was not allowed to scout nor tank creep waves with them. The opening to the tournament saw members of the audience facing off against OpenAI as a sort of benchmark of their prowess. However, the show's still going on Twitch with OpenAI explaining more about how they built and tested their team, and what's next for them.
In the first match, the AI steamrolled the humans in just 21 minutes. There, OpenAI bots will face the winning team, for its biggest challenge yet.
It was a best-out-of-three event, so the AI had already won when round three came along.