Not only are these bots able to work together as a team, they can defeat humans several times. You can watch a video match between AI against humans in the link at the end of the article.
In the OpenAI video, a "Dota expert" named William "Blitz" Lee commented on how to play OpenAI Five. He admitted to being amazed by the AI's ability to master parts of the map. Blitz itself lost when against these bots.#AI bots just beat humans at the video game Dota 2. That’s a big deal, because their victory required teamwork and collaboration – a huge milestone in advancing artificial intelligence. https://t.co/UqIUhh9xFc— Bill Gates (@BillGates) 26 Juni 2018
"It feels like every mistake I make is exploited and I feel humans cannot do that," he said.
Now, the bots of OpenAI will be pitted against the professional players to see if they too will win. The DOTA 2 Competition, The International will be held in August. At the end of July, OpenAI Five will fight the best professional Dota 2 players in the world.