Google says Carbon is built for long, multi-step coding, cybersecurity and research work, and is priced at $2 per million input tokens and $10 per million output tokens until 30 November.
Google on Tuesday made Gemini 4 Carbon available through the paid tier of the Gemini API in AI Studio and Gemini for business, and began rolling it out to Google AI Ultra subscribers in the Gemini app, AI Mode in Search and its Antigravity coding tool. Google describes Carbon as its strongest model, aimed at complex multi-step coding and debugging, cybersecurity and open-ended scientific research, while Gemini 4 Argon remains its recommended model for most engineering and knowledge work. Carbon was released to a group of cybersecurity defenders through Google’s Fairwind Program two weeks ago. The introductory price matches Argon, at $2 per million input tokens and $10 per million output tokens, rising to $4 and $20 after 30 November, Google said. Google also previewed a “/swarm” feature in Antigravity that splits one prompt across a coordinated team of agents.