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On November 12, Google introduced Gemini 4 Hydrogen, the fast member of the Gemini 4 family. It's built for quick work across everyday coding and agentic workflows, while Gemini 4 Carbon and Argon handle deep, long-horizon reasoning. Google says Hydrogen scores 51 on the Artificial Analysis Intelligence Index at its default high thinking level, and 54 at xhigh. Argon scores 50. Hydrogen has a 1M-token context window. It costs a flat $1.50 per million input tokens and $7.50 per million output tokens across that window. Starting today, it is rolling out globally across all tiers of Google AI Studio, the Gemini API, Gemini for business, the Gemini app, and Google Search. Paid Google AI Pro and Ultra subscribers can try it in Google Antigravity. Source: Google blog.
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