Gemini 4 Carbon opens to all paying users

Google opened Gemini 4 Carbon on November 10 to paying developers, enterprises and Google AI Ultra users through the AI Studio API, Gemini for business, Antigravity, the Gemini app and AI Mode in Search. Promotional pricing is $2 per million input tokens and $10 per million output tokens; after November 30 it rises to $4 and $20. Google says Carbon ranks first on CursorBench 4.0, WANDR and AutomationBench, and is previewing /swarm to split one request across multiple agents. Cybersecurity, safeguard and scientific results remain largely vendor or partner evaluations, so adopters should recheck accuracy, latency, token use and permission boundaries in real workflows.