Idk what you mean by saying this doesn't preclude a monopoly - having your pricing power eroded by competition is kinda one of the key features of what a monopolistic market isn't
A monopoly means a company has enough leverage to corner and disproportionately own the market. This is entirely possible (and usually the case) even with significant pricing pressure.
Feels like I won't be paying for anything that isn't real-time. And that any time delay I can introduce in my process will come with massive savings. Picture hiding the loading of loot info behind a treasure chest opening animation in a game, except that time difference means you can pull all the work in-house.
Openrouter.ai seems like a step in the right direction but I'd want to do all their calculations myself as well as factor in local/existing gear in a way they don't.
This is just a weird dichotomy you're introducing. Open source will introduce price pressure as any competition will - that doesn't mean you won't have a monopoly.