This demonstration is the clearest I've seen so far, showing the gulf between Opus and Fable for app creation:

https://www.youtube.com/watch?v=TzJCly4YgDQ

The Age of Empires clone (and the difference in graphics quality/creativity between Opus and Fable) is at the end of the video and I was blown away.

Notice how this guy prompts the models. Very detailed, with technical requirements and steering. He's going for a one-shot build and he nailed it.