Google makes Gemini 4 Carbon available to paying users and AI Ultra subscribers, it says

Google on Tuesday said it is making Gemini 4 Carbon available to paying developers and enterprises and rolling it out to Google AI Ultra subscribers, two weeks after releasing the model to cybersecurity defenders through its Fairwind Program. The model is available via the Gemini API paid tier in Google AI Studio and Android Studio and in Gemini for business, Google said, and is rolling out to Ultra subscribers in the Gemini app, AI Mode in Search, and Google Antigravity. The Verge noted that Google did not say when, or whether, Carbon would be offered to free users or lower-tier subscribers. 9to5Google reported that Gemini 4 Argon remains available alongside Carbon.

Google said Carbon’s introductory API price is the same as Gemini 4 Argon’s: $2 per million input tokens and $10 per million output tokens. After the introductory period expires on Nov. 30, 2026, the price will be $4 per 1 million input tokens and $20 per 1 million output tokens, Google said, adding that those rates apply to “the Carbon model intended for public access only.”

The company is previewing /swarm in Google Antigravity, “turning a single prompt into a coordinated team of agents you can track in real time,” Google said. Developers can assign Carbon to roles that demand the deepest reasoning, such as architectural design, coordination, and auditing, and pair it with faster, lighter models, the company said.

Google called Carbon its “strongest model,” with what it described as frontier performance in cybersecurity and long-horizon agentic workflows. It said Carbon ranks first on CursorBench 4.0, Perplexity’s WANDR, and Zapier’s AutomationBench, at more than two times lower cost per task than the next best external model. On a new Multimodal Knowledge Agent benchmark created with Artificial Analysis, Google said Carbon ranks second and is more than six times lower in average cost per task than the top-performing model.

Google said Argon remains “the ideal choice for the majority of software engineering and knowledge work,” while Carbon is built for harder multi-step coding and open-ended scientific research and uses more tokens than Argon. Cybersecurity defenders can still apply to the Fairwind Program for access to Carbon for cyber, Google said. Scientists and researchers can apply for six months of Antigravity’s highest usage tier at no charge, subject to eligibility, capacity, and selection.

Google makes Gemini 4 Carbon available to paying users and AI Ultra subscribers, it says

Sources