Google keeps it simple with two paths. The free version handles your basic...

https://www.bookmark-xray.win/gemini-offers-a-free-version-that-is-great-for-basic-tasks-and-quick-questions

Google keeps it simple with two paths. The free version handles your basic brainstorming and daily writing tasks. If you need serious power, the $19.99 per month AI Premium plan integrates directly into Docs and Gmail