where do I find the paid option? I can not find that on their product page. There are only two options I can see; one "Available at no charge" and another one "Coming soon - For organizations"

Can you upgrade in the IDE? It would be strange that Google has a performance problem for paid users while I do not experience any such issues at all with Claude and Codex.

They've all avoided loading up their LLMs with ads to this point. That is going to change dramatically over the next 2-3 years. All of them will be loaded with ads, and Google will partake as expected given their ad network & capabilities in that realm. They'll match GPT's ad roll-out.