Comment by avree

There were 112 heroes available at that time. It's also worth noting that two of the heros chosen for OpenAI to use, Viper and Sniper, are considered some of the mechanically 'easier' heroes, as they rely primarily on autoattacks to do damage, as oppose to decision-making around when to use spells. Crystal Maiden, Lich, and Necrophos, the other 3 of the 5 OpenAI heros, are similarly considered 'easier' as they have spammable, very forgiving abilities that can be used almost indiscriminately.