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MOUNTAIN VIEW, California – Google made Gemini 4 Carbon available Tuesday to paying developers and enterprises and began rolling it out to Google AI Ultra subscribers, expanding access to a model previously offered to a limited group of cybersecurity defenders.
Google positions Carbon for demanding, multi-step coding, scientific research and other work that requires extended reasoning. In its November 10 announcement, the company said Gemini 4 Argon remains its recommended option for most software-engineering and knowledge-work tasks, while Carbon uses more tokens to explore and verify harder problems.
The new access is not a free rollout to every Gemini user. Developers can use the paid Gemini API tier in Google AI Studio and Android Studio. Enterprises can try Carbon through Gemini for business, Google Antigravity or CodeMender. Google AI Ultra subscribers are getting access in the Gemini app, AI Mode in Search and Antigravity.
Introductory API pricing: Google lists $2 per million input tokens and $10 per million output tokens for the public-access Carbon model. After the introductory period expires November 30, 2026, those rates become $4 and $20, respectively. Tokens are the units a model processes and generates; these are API usage rates, not a consumer subscription price.
Google also previewed a /swarm feature in its Antigravity development platform. It is designed to turn a prompt into a coordinated team of AI agents, with Carbon handling deeper reasoning tasks while lighter models work in parallel. The feature is a preview, not a claim that every project can run without human checks.
The company says Carbon improves performance in coding, document and data analysis, scientific reasoning and cybersecurity. Its benchmark rankings, cost-per-task comparisons and safety-test results are Google’s reported evaluations, not guarantees of accuracy, security or savings in a particular user’s workflow.
Access to Carbon’s specialized cybersecurity offering remains through the Fairwind Program on a rolling basis. That program should not be confused with unrestricted access to all cyber capabilities through the public model.
Google is also expanding its research-access program to include Carbon alongside Argon. Scientists can apply for six months of free access through Antigravity’s highest usage tier, with eligibility, capacity and selection limits and rolling onboarding. An application does not guarantee admission.
This is a separate model-availability announcement from Google Cloud’s Gemini for healthcare preview, which addresses medical and administrative workflows.
What it means: More paying users can now try Carbon on work that takes multiple steps, but access tier, token use and the end of introductory pricing matter. Businesses should test the model on their own tasks and keep human review for consequential outputs.
JBizNews Desk | Technology & Business
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