Google Gemini AI API

Gemini API  |  Google AI for Developers

Gemini API quickstart  |  Google AI for Developers

free or not free, that is the question :) With Google, not easy to find...

https://aistudio.google.com/

The Google Gemini AI API offers both a free and paid tier.

For developers and smaller projects, a free tier is available to get started.[1][2]

The free tier comes with limitations on the number of requests you can make per minute and per day. For instance, you can make between 5 and 15 requests per minute and up to 1,500 requests per day with the Gemini 1.5 Flash model.[1][2] There are also limits on the number of tokens that can be processed per minute, around 250,000

Additionally, using Google AI Studio is free of charge.[2] (1M tokens each session!)