While interesting as a matter of discourse, for any serious consideration you must consider the R&D costs when pricing a model. You have to pay for it somehow.
Company 1 gets a bucket of investment, makes a model, goes belly up. Company 2 buys Company 1's model in a fire sale.
Company 3 uses some open source model that's basically as good as any other and just makes the prettiest wrapper.
Company 4 resells access to other company's models at a discount, similar to companies reselling cellular service.