Reasoning and Verification

Google has opened Gemini 4 Carbon, its strongest model, to all paying developers and Google AI Ultra subscribers, ending a two-week restriction to cybersecurity defenders in its Fairwind Program. Carbon keeps Gemini 4 Argon's introductory pricing of $2/$10 per 1M input/output tokens but spends more tokens on reasoning and verification, ranking first on CursorBench 4.0, WANDR and AutomationBench at less than half the per-task cost of the next-best outside model.