Gemini 4 Carbon opens to paying developers, enterprises and Google AI Ultra subscribers
Google made Gemini 4 Carbon, its strongest model for long-running agentic work, coding, cybersecurity and scientific reasoning, available on November 10, 2026 through the Gemini API, Gemini for business and, for Google AI Ultra subscribers, Google Antigravity, the Gemini app and AI Mode in Search.
What happened
- Carbon had been limited to cybersecurity defenders in Google's Fairwind Program since its announcement two weeks earlier; it is now in the Gemini API paid tier in AI Studio and Android Studio and in Gemini for business.
- The introductory API price matches Gemini 4 Argon at $2 per million input tokens and $10 per million output tokens; Google says $4 and $20 apply after the introductory period ends on November 30, 2026.
- Google is previewing a /swarm feature in Google Antigravity that turns one prompt into a coordinated team of agents, with Carbon assigned to the hardest roles and lighter models working in parallel.
- Google says Carbon ranks first on CursorBench 4.0, Perplexity's WANDR and Zapier's AutomationBench at more than 2x lower cost per task than the next best external model.
- Google positions Argon as the default for most coding and knowledge work, and Carbon for complex multi-step tasks where it uses more tokens to reason and verify.
Why it matters: Teams that use Gemini for heavy coding or document-analysis agents can now try Google's top model at the lower introductory rate, but should budget for the price doubling after November 30. The benchmark rankings are Google's own reporting.
Sources
- Google: Gemini 4 Carbon is now available blog.google
Checked November 11, 2026 against the sources above. Claims about performance or benchmarks are the company's own unless stated otherwise.