AI3 min
Google opens its strongest AI model, Gemini 4 Carbon, to paying developers and subscribers
Google says Gemini 4 Carbon is its strongest model, built for long, multi-step coding, research and agent tasks. Two weeks ago only a group of cybersecurity defenders could use it. Now all paying developers can use it through the API in Google AI Studio and Gemini for business, at the same introductory price as Gemini 4 Argon: $2 per million input tokens and $10 per million output tokens. It is also rolling out to Google AI Ultra subscribers in the Gemini app, AI Mode in Search and Google Antigravity, Google's coding tool. GitHub says it is now in GitHub Copilot for Pro+, Max, Business and Enterprise users. Google says Carbon ranks first on CursorBench 4.0, Perplexity's WANDR and Zapier's AutomationBench, at less than half the cost per task of the next best outside model. On Google's new Multimodal Knowledge Agent benchmark, built with Artificial Analysis, Google says it ranks second. Google also previewed /swarm in Antigravity, which turns one prompt into a team of coordinated agents.
Hype check: The rankings and cost figures are Google's own claims. Google says Argon is still the better choice for most everyday work, and Carbon uses more tokens on hard problems. Try it only if you have tasks that really need it.