To be clear, I'm counting "every time I press submit" as a query. 3-4c to tell it "Your answer is clearly wrong because X, and Y" isn't very enticing.

Around $10/mo would be far more palatable, I don't mind if my usage is capped. I simply do not get $20/mo worth of value back out of it at this point. That's basically the price of 1 book/mo, and I'd get more value out of that.