Gemini offers a free tier that handles day-to-day writing and brainstorming...

https://www.bestbookmarks.win/gemini-keeps-things-simple-with-two-distinct-options-the-free-version-handles

Gemini offers a free tier that handles day-to-day writing and brainstorming with ease. If you are a power user or professional needing deeper capabilities, the Google One AI Premium plan costs $19.99 per month