Google’s Gemini 4 Carbon turns one prompt into an AI agent team

Google is making Gemini 4 Carbon available through its API, business products, and selected consumer services. In an official Google blog post, Koray Kavukcuoglu announces that the model targets demanding, long-running tasks in software engineering, scientific research, cybersecurity, and complex knowledge work.

Carbon joins Gemini 4 Argon, which Google positions as the more efficient option for most everyday coding and knowledge tasks. Carbon is designed for cases where an AI system needs to examine more information, work through several steps, and repeatedly check its own output. Google says this makes it suitable for difficult debugging, architectural planning, document analysis, and open-ended research.

The company also previews a feature called /swarm in Google Antigravity. It lets users assign a single request to a coordinated group of AI agents. Carbon can handle roles such as planning, auditing, and coordination, while lighter models work on parallel tasks. Google says users can follow the agents’ progress in real time.

Claims on cost and performance

Google says Carbon leads several external workflow benchmarks, including CursorBench 4.0, Perplexity’s WANDR, and Zapier’s AutomationBench. It also cites a new Multimodal Knowledge Agent benchmark, developed with Artificial Analysis, where Carbon ranks second while costing less per task than the top model. These results are company-reported claims and are not independently verified in the announcement.

For cybersecurity, Google says Carbon can help teams find, test, and patch software vulnerabilities. The company reports improved results in its internal Project Fortify system and says external testers used the model in vulnerability research. Google also describes new safeguards intended to reduce malicious use and indirect prompt injection.

Carbon is available to paying API and enterprise customers at an introductory rate of $2 per million input tokens and $10 per million output tokens. Google says prices rise to $4 and $20 respectively after November 30, 2026. Google AI Ultra subscribers can access it through Antigravity, the Gemini app, and AI Mode in Search.