Gemini offers a free tier for casual users who need help with quick tasks or...

https://research-wiki.win/index.php/What_Are_Gemini_Usage_Limits%3F_A_Deep_Dive_into_Plan_Tiers_and_Caps

Gemini offers a free tier for casual users who need help with quick tasks or creative brainstorming. If you require more power, the Advanced plan costs $20 per month and includes a 1 million token context window