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The bots were using their ultimates pretty liberally. Maybe their "bot meta" is very group-intensive, so if they see one hero there's a good chance there are other heroes nearby? Other possible reasons: Opportunity cost of not using ultimates, getting a single kill late game can mean victory, bots penalized for games going later or their games just not running long in general?

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I think it’s becoming clear that the network is overfitting to team fights (and other small duration action). OpenAI use of cooldowns in the last 20 minutes was inexcusable. It became obvious OpenAI had no working strategy.

Is OpenAI's expected win chance available anywhere? Only the bot reaction time against initiations was keeping them in the game for the last 20 minutes, so it might have been the desperate flailing typical of bots when they are losing.

The bots are actually calculating their expected win chance continuously throughout the match, even while the heroes are still being picked. During the OpenAI Five benchmark, the AI estimated its win chance at over 90 percent when it got to pick its own heroes, but estimated a mid 20% chance of victory when it was deliberately given bad heroes.

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