Honestly, GPT 5.6 Luna is worth a look. It’s a reasonably good implementer at a small fraction of the cost. $100 buys a heck of a lot of it at API pricing.

Not sure about the OAi Pro plan, doesn’t look like the 80% Luna price slash made its way into the quota system.

You could also try tuning down the effort level on Opus. It makes a huge difference in token consumption and you might be able to get away with lower than you’ve set