For centering divs the free models opencode offers can easily handle that work. DeepSeek V4 Flash is pretty decent.

Sure, but something that is “sonnet tier” is going to get there faster and with less pain. Well worth the 13 cents!

Flash will get their faster then the sonnet tier which involves reasoning which is slow. And you don't need reasoning to center divs.

The sonnet tier sits below claude or chatgpt in terms of price but costs so much more than free models. If you are breaking downtasks now I'm not sure that 13 cents is worth it.