As of yesterday, developers on the paid tier of the Gemini Developer and Gemini Enterprise APIs can build using Gemini 4 Carbon via Firebase AI Logic. This allows developers to integrate intelligent features into their mobile and web applications using client-side SDKs.
Gemini 4 Carbon is rolling out now! Carbon is built for your hardest problems across full-stack app building, knowledge work, and scientific research by exploring edge cases thoroughly, reasoning through complex steps, and running extended verification loops to get the details right. While Gemini 4 Argon remains the go-to model for most software engineering and knowledge work, Carbon steps in for tasks that push a model to its limits — from complex, multi-step debugging to open-ended scientific reasoning. Available starting today: — Consumers: use in the Gemini app, and AI Mode in Search for Google AI Ultra subscribers — Developers & Enterprises: build via the Gemini API in Google AI Studio and Android Studio, Google Antigravity for Google AI Ultra subscribers, and Gemini for business — Scientists & Researchers: apply for a chance to get 6 months free of the highest usage tier in Antigravity → https://goo.gle/4AoSovC — Cybersecurity Defenders: apply to join the Fairwind Program for access to Carbon for cyber → https://goo.gle/fairwind More details → https://goo.gle/48OSWio Watch how Gemini 4 Carbon brings reasoning and coding together, turning avian research into an interactive 3D simulation of a songbird’s vocal organ that synthesizes the sounds of six species live.