Google opens Gemini 4 Carbon to the public, previews agent collaboration features

Google has opened its Gemini 4 Carbon AI model to the public after an initial release to cybersecurity defenders, targeting complex multi-step coding and open-ended scientific research. The model is available through the Gemini API to paid developers and enterprises, and to Google AI Ultra subscribers. Google is also previewing a swarm feature on its Antigravity agent development platform that turns a single prompt into a coordinated team of agents. Introductory pricing is $2 per million input tokens and $10 per million output tokens, with the discount ending at the end of November, when prices double. The release broadens access to Google's frontier model and signals a push into multi-agent orchestration, making the November price increase the next milestone to watch.