Google said on Tuesday it is making Gemini 4 Carbon available to developers, enterprises, scientists and consumers, two weeks after it released Carbon only to cybersecurity defenders through its Fairwind Program. Google calls Carbon its strongest model, with frontier performance in cybersecurity and long-horizon agentic work across complex knowledge work, software engineering and scientific reasoning.

Carbon is available via the API in Google AI Studio and Gemini for business for all paying developers and enterprises, at the same introductory price as Gemini 4 Argon: $2 per million input tokens and $10 per million output tokens. It is also rolling out to all Google AI Ultra subscribers in Google Antigravity, the Gemini app and AI Mode in Search.

Google says Argon remains the ideal choice for most software engineering and knowledge work, while Carbon is built for tasks that test the limits of a model's intelligence, using more tokens to explore, reason deeply and run extended verification loops. It ranks #1 on CursorBench 4.0, Perplexity's WANDR and Zapier's AutomationBench at more than 2x lower cost per task than the next best external model, Google says.

Alongside the wider release, Google is previewing /swarm in Antigravity, turning a single prompt into a coordinated team of agents that can be tracked in real time, and expanding its scientist program so current and future participants get Carbon in Antigravity's highest usage tier free for six months. This widens the October 28 announcement, when Carbon was announced for cyber defenders first.