Google opened Gemini 4 Carbon to developers, businesses and Google AI Ultra subscribers on Nov. 10, extending access to a model it says uses more tokens than Argon for extended reasoning.
Researchers are another potential user group, though access is not guaranteed. Scientists and researchers may apply for a chance to use both Carbon and Argon for six months at no charge through Google Antigravity’s highest usage tier. Google says it will select participants based on eligibility and capacity.
Paying developers can use Carbon through the Gemini API in Google AI Studio or Android Studio. Enterprises can access it through Gemini for business. Google is also rolling out access to all Google AI Ultra subscribers in Google Antigravity, the Gemini app and AI Mode in Search.
Google describes Carbon as a model for complex coding and debugging, as well as open-ended scientific research. It says the model uses more tokens than Gemini 4 Argon to support extended reasoning and verification. Because API charges are based on tokens, the amount used affects a customer’s cost. Koray Kavukcuoglu, senior vice president at Google DeepMind and chief AI architect at Google, said, “Argon remains the ideal choice for the majority of software engineering and knowledge work.”
Google set introductory API prices at $2 per 1 million input tokens and $10 per 1 million output tokens. After the introductory period expires Nov. 30, the prices will rise to $4 and $20, respectively. Google did not specify a cutoff time or time zone for the change.
The wider release follows Google’s Oct. 28 announcement that it would initially give Carbon to a subset of cyber defenders through its Fairwind Program. Google said access would then expand gradually to trusted partners through Fairwind. Its Nov. 10 announcement added paid developer and enterprise access, a consumer rollout for Ultra subscribers and a possible research route. EconoTimes previously covered Google’s access expansion and API price schedule. The higher API prices apply after Nov. 30.
