Google expands access to Gemini 4 Carbon for complex research and coding

Google is rolling out its new Gemini 4 Carbon model following an initial preview late last month. The high-end model is now available to Google AI Ultra subscribers paying $100 a month inside the Gemini app, AI Mode, and Google Antigravity, as well as via Google AI Studio and Gemini for business. [4][2][3]

Google says Argon remains the better fit for general knowledge and software engineering work, while Carbon is built for tasks demanding deeper reasoning, including multi-step coding, zero-day vulnerability discovery, and scientific research. Antigravity is also previewing a feature called /swarm to orchestrate coordinated agent teams. Developers using the API pay introductory rates of $2 per million input tokens and $10 per million output tokens through November 30, which will increase to $4 and $20, respectively. [4][2]

The release is aimed at competing with leading systems from OpenAI and Anthropic across heavy technical workflows. To accelerate adoption in research, Google is providing 10,000 scientists with free access to Carbon for six months, while cybersecurity professionals can apply for access through the company's Fairwind Program. [4][2][3]