OpenAI Five, a video-game playing artificial intelligence bot, has fallen to humans again.
The International, an esports championship for video game Dota 2, hosted a match Wednesday with Brazilian pro team Pain against OpenAI Five The intense game lasted roughly 52 minutes, and the humans won.
OpenAI is a nonprofit artificial intelligence research company co-founded by Elon Musk. Its game-playing software beat human pro players in single-player matches at the International last year and beat amateur players in teams in June. Earlier this month, OpenAI Five tallied a loss against semi-pro players.
Dota 2 is a multiplayer online battle arena (MOBA) video game developed by Valve. It's free to play and has over 10 million active users a month. Each team has five heroes that can regenerate at a base. Whichever team first destroys the other's base wins.
"What we proved on Wednesday is we're right there at the edge of human ability, and the test is whether we can beat a pro team," Greg Brockman, co-founder of OpenAI, said in an emailed statement. "The test for us is whether we can play at a high enough level to win against a professional team this week."
Although the humans secured a solid win, the AI bots had more kills -- meaning the bots killed human heroes more frequently. The bots learn based on data and past mistakes, they try to solve the same problem over and over again until they get it right.
"OpenAI Five plays 180 years' worth of games against itself every day," OpenAI noted in a blog post in June.
Valve and team Pain didn't immediately respond to requests for comment.