Google Expands Gemini 4 Carbon Access to Developers and AI Ultra Subscribers

Google announced the rollout of Gemini 4 Carbon on Tuesday, expanding access to developers and enterprises through paid plans, while Google AI Ultra subscribers can use it across select products like the Gemini app and AI Mode in Search. Compared to Gemini 4 Argon, Carbon handles more demanding, multi-step tasks by spending more time reasoning and verifying output. It ranks first on three benchmarks and claims over twice the cost efficiency per task, priced at $2 per million input tokens and $10 per million output tokens. A new /swarm feature in Google Antigravity turns a single prompt into a coordinated team of AI agents. Cybersecurity capabilities include vulnerability identification and verified patch generation, offered through the Fairwind Program.