Google releases Gemini 4 Carbon, a frontier model for deep reasoning

Google has made Gemini 4 Carbon available to developers, enterprises, scientists, and consumers, according to an announcement from Koray Kavukcuoglu of Google DeepMind. Google says Carbon is built for work that needs more tokens and longer verification loops, such as complex multi-step coding, debugging, and open-ended scientific research, while Gemini 4 Argon remains the recommended choice for most software engineering and knowledge work. Carbon is offered through the API in Google AI Studio and Gemini for business at $2 per million input tokens and $10 per million output tokens, the same introductory rate as Argon. It is also rolling out to Google AI Ultra subscribers in Google Antigravity, the Gemini app, and AI Mode in Search. Google is previewing a /swarm feature in Antigravity that coordinates teams of agents from one prompt.