There is another scenario that no amount of API optimization can fix: data residency requirements. If you work in healthcare, finance, or government, your data might not be allowed to leave your infrastructure.

Every API call sends your data to someone else's servers. For regulated industries, that is a non-starter.

Self-hosting gives you a way out of both problems. You run open-source models on your own GPUs, pay a fixed infrastructure cost regardless of request volume, and keep every byte of data on your own machines.

But self-hosting is not free. You take on GPU procurement, model serving, scaling, and maintenance. The question is not whether self-hosting is good or bad. It is whether your specific usage pattern crosses the breakeven point where it starts making financial sense.