A year or eighteen months ago, if you were to ask me how much I would personally pay to have access to a then-frontier model for work, I would have said: not much. They were frustrating to instruct and use. The cost of play was too high.
Six months ago, I think I would have paid $100 per month.
Today, for a current frontier model and harness with all-I-can-eat, I think I would pay a big chunk of my salary. Easily more than $2,000 per month.
Everything improved: models, harnesses, and instructions from me.
This makes me realize that I have no advantage over LLMs in general software development.