Google AI Studio

Editor's Review

Google AI Studio is the best free on-ramp to building with Gemini — the web interface is free with no credit card, and the free API tier (via an AI Studio-generated key) gives most Flash models free input/output/context caching within rate limits. It's the zero-cost path from prompt to prototype, and in 2026 it got serious: on July 28, managed agents gained environment hooks (block/audit/lint every tool call), token budget caps, cron-scheduled triggers, and a free tier on Gemini 3.6 Flash. Build mode vibe-codes full-stack apps with Firebase, and the Google Cloud Starter Tier lets you publish up to 2 apps without a billing account. The pricing to watch: Gemini 3.8 Flash — "the most intelligent Flash model" — is $0.75/$3.75 per million input/output tokens through December 31, 2026, then doubles to $1.50/$7.50 on January 1, 2027. Budget your 2027 accordingly. Other reference points: 3.5 Flash-Lite $0.30/$2.50, 2.5 Pro $1.25/$10 under 200K context, batch mode 50% off. Two honest limitations: the free tier's rate limits are no longer published publicly (sign in to see them), and free-tier data trains Google's products — no opt-out without paying. It's also Google-only; per-key quotas don't exist (limits are per project). Who should use it? Anyone prototyping — nothing beats free. Who should graduate? Production multi-model apps: OpenRouter (one key for Claude, GPT, Gemini, open weights) wins on flexibility. AI Studio is the lab; OpenRouter is the loading dock.