My understanding is a bit unclear, so I would like to ask for clarification. When will I be charged for using Gemini 1.5 Pro? If I use Gemini 1.5 Pro directly within the Google AI Studio interface, will it be free of charge? And if it’s free, will it only be free until May 30, 2024, or will it be free indefinitely but with a limited number of calls?
Free for the foreseeable future except for locations that will require billing. Access restrictions will apply. In free plans, information you provide can be used to improve the model.
Thank you for your response 
Starting May 30th, there’s a rate limit of 50 times a day, twice a minute