Google has expanded access to Gemini 4 Carbon, its advanced artificial intelligence model built for complex multi-step reasoning, after an initial release limited to cybersecurity specialists, as reported by lanacion.com.ar on November 10.
Google AI Ultra subscribers can access the model inside the Gemini app and the search AI mode, according to infobae.com. That subscription costs 100 dollars a month, diariobitcoin.com reported.
🚨 Google amplía el acceso a Gemini 4 Carbon El modelo está orientado a programación compleja, ciberseguridad e investigación científica. 10.000 científicos tendrán acceso gratuito durante seis meses. Google mantiene Gemini 4 Argon como opción recomendada para la mayoría de… pic.twitter.com/WiWWqbvY0c
“El modelo se destaca en tareas largas de varios pasos, como programar, analizar documentos y razonar sobre ciencia,” said Koray Kavukcuoglu, vicepresidente de Google DeepMind, told infobae.com.
Google sets introductory promotional token prices
For developers, Google set an introductory promotional price of 2 dollars per million input tokens and 10 dollars per million output tokens, which will double when the promotional period ends in late November. VentureBeat reported earlier pricing structures at 4 dollars and 20 dollars, while infobae.com said that lower token prices do not automatically guarantee a smaller final bill because different models consume varying token quantities for identical workloads.
Those introductory rates sit at roughly one-fifth of OpenAI’s GPT-6 Astra and one-fourth of Anthropic’s Claude Fable 5.2, according to infobae.com. Meanwhile, diariobitcoin.com said that Google is offering free access for six months to 10,000 selected scientists.
Agentic workflows and security roles
Carbon demands higher computational overhead to reason through and verify its own outputs than Gemini 4 Argon, which remains Google’s recommended option for general office tasks and standard software engineering. Inside Google Antigravity, the company’s agentic programming platform, a new trial function called /swarm transforms a single prompt into an active team of specialized AI agents.

Developers can assign Carbon to high-level reasoning tasks such as architectural design, cross-agent coordination, and system auditing. In specialized cybersecurity deployments, the model remains restricted strictly to verified defenders.
| Model Tier | Target Audience | Primary Function |
|---|---|---|
| Gemini 4 Argon | General users and standard engineering | Routine office work and basic coding |
| Gemini 4 Carbon (Ultra) | Subscribers, developers, and enterprises | Multi-step reasoning, science, and agentic workflows |
Infobae.com said that it remains unclear whether Carbon will eventually filter down to lower subscription tiers or free users.