Google opens Gemini 4 Carbon to Ultra subscribers and developers
Google AI Ultra subscribers can use Carbon in the Gemini app, AI Mode and Antigravity, while developers can access it through the paid Gemini API tier.
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Google AI Ultra subscribers can use Carbon in the Gemini app, AI Mode and Antigravity, while developers can access it through the paid Gemini API tier.
Google is rolling out its Gemini 4 Carbon superintelligence (SI) model to Google AI Ultra subscribers in the Gemini app, AI Mode in Search and Google Antigravity. Developers can use Carbon through the paid Gemini API tier in Google AI Studio and Android Studio; Ultra subscribers can also try it in AI Studio.
Enterprises can use Carbon in Gemini for business through its API or model selector, in Antigravity, or through specialized agents such as CodeMender and AlphaEvolve. An API is a way for software to connect to a service.
Google announced Carbon on 28 October 2026 and had already disclosed its introductory prices. It initially offered the model to a selected group of cybersecurity defenders, with a plan to gradually extend access to additional trusted partners through its Fairwind Program and broader access still to come; The Verge said that limited release took place about two weeks before the public rollout.
Carbon’s introductory API prices run through 30 November, after which the rates rise. Tokens are units used to measure the text a model receives and produces.
| Token type | Introductory rate | After 30 November |
|---|---|---|
| Input | $2 | $4 |
| Output | $10 | $20 |
Argon remains available to Google AI Pro subscribers and higher tiers. Google recommends Argon for most software engineering and knowledge work, while positioning Carbon for harder tasks such as multistep coding, debugging and open-ended scientific research. For legal, finance and enterprise work, Google says Carbon can follow strict formats to produce spreadsheets, presentations and reports and perform higher-precision data analysis.
Antigravity is previewing /swarm, which Google says turns a single prompt into a coordinated team of agents that users can track in real time. Agents are software systems given tasks to carry out. Google says developers can assign Carbon design, coordination and auditing roles while faster, lighter models work in parallel isolated workspaces and separate adversarial verifiers test changes.
Google says Carbon ranked first on the Multimodal Knowledge Agents benchmark, using what it describes as 3X fewer tokens than the next-best model across 200 tasks. Google developed the test with Artificial Analysis to assess how agents reason over files containing material such as charts, images and tables; it says existing benchmarks do not adequately capture that work. 9to5Google detailed the access routes and the preview.
Scientists and researchers can apply for a chance to use Argon and Carbon free for 6 months at Antigravity’s highest usage tier. Selection depends on eligibility and capacity, and successful applicants are onboarded on a rolling basis. Cybersecurity defenders can also apply for Carbon access through Google’s Fairwind Program, with access granted on a rolling basis rather than immediately to every applicant.
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Update ·
Revised from the day's reports.
Update ·
The update adds that the limited release to cybersecurity defenders took place about two weeks before the public rollout.