I've only built one thing with it so far. I don't know if it's worth it because the model will be removed from subscriptions on June 22nd. Then it goes to token API only. They hope to bring it back to subscription at some point. However, I feel that this is a shift. It is so good that people will want to pay money for it. And like a drug dealer. Once you get a taste of it, you'll want more. Who knows. Maybe Opus 5 will be that good and that's all you'll need.