[mdrzn]

Gemini has a very generous Free Tier for their API (including 2.5 Flash and 2.5 Pro): https://aistudio.google.com/app/apikey

[kenmacd]

Keep in mind that using the free tier models means Google will keep what you send and use it for training.

In bold in their terms is: "Do not submit sensitive, confidential, or personal information to the Unpaid Services."

https://ai.google.dev/gemini-api/terms#unpaid-services