Gemini has a simple setup for different users. The free version works perfectly...

https://zoom-wiki.win/index.php/Gemini_API_vs_OpenAI_API:_The_Developer%E2%80%99s_Guide_to_Real_Costs

Gemini has a simple setup for different users. The free version works perfectly for basic tasks like drafting emails or organizing your schedule. If you need more power, the Google One AI Premium plan is $19.99 per month