Google AI Studio

Google AI Studio is a free web app for testing prompts against Gemini models, tuning settings, and exporting the code plus API key to use them in your own project. It is the fastest way to try Gemini and build a quick prototype before committing to a build. The tradeoff is that it is a prototyping surface, not a coding agent or editor, and moving to production means paying standard Gemini API rates for usage.