OpenAI's bot, called OpenAI Five, competed in The International 2018 Dota 2 tournament. Despite being top-ranked players' opponents, it lost two games but maintained a competitive edge for the first 20-35 minutes of each match. --- Why it matters: This matters to AI researchers because it showcases the current state of AI's ability to play complex games like Dota 2 at a high level, highlighting both its strengths and weaknesses. Source: https://openai.com/index/the-international-2018-results