Google AI Studio
aistudio.google.com
Google's free browser-based development environment for building with Gemini models, including a free API tier with some of the highest token limits available to individual developers.
Why it is useful
The free tier access to Gemini 2.5 Flash alone makes this worth bookmarking — it includes a 1M token context window at no cost. AI Studio lets you test prompts, tune system instructions, and generate API keys without any payment setup. For developers evaluating whether Gemini fits their use case, it removes all friction from experimentation.
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