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On November 10, Google opened up Gemini 4 Carbon, its strongest model for long-horizon agentic work. Cyber defenders got it two weeks earlier. It is now in the Gemini API for all paying developers in Google AI Studio and in Gemini for business. It has the same introductory price as Gemini 4 Argon, $2 per 1M input tokens and $10 per 1M output tokens. The introductory period ends on November 30, 2026, and then the price becomes $4 / $20. Google says Carbon uses more tokens than Argon to reason and verify. Google still recommends Argon for most software engineering and knowledge work. Carbon is also rolling out to Google AI Ultra subscribers in Google Antigravity, the Gemini app, and AI Mode in Search. Source: Google blog.
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