(This was posted as a reply to a different thread and moved here) It's still completely braindead at combat and can't take a city. In fact, it can't even take an unwalled, undefended city from a human player two eras behind it in tech. It's that bad. Its units will just aimlessly walk around in your territory and get constantly distracted when they could easily have taken your city if they just attacked it. It has, however, gotten a bit better at empire management and diplomacy... but only a little bit. It's still horrifically easy to abuse for trade deals and endless friendship declarations. Oh, and it has finally been taught how to use air units now. It only took two expansions. Sadly, you'll likely already have won the game by the time they start building any, even on Deity.