Google Launches Gemini 4 Hydrogen, Rolls Out to Search Globally

Google has released Gemini 4 Hydrogen, a replacement for its Gemini 3.8 Flash model, available immediately across Google products including Google Search. Unlike recent Argon and Carbon model releases, Hydrogen carries no subscription restrictions. The model runs at four thinking levels, including a new xhigh mode, and Google says it is 2.5 times faster than Flash 3.8 even in high thinking mode. Google also claims Hydrogen reduces fabricated claims by more than 5x compared to 3.8 Flash, and that it more than triples 3.8 Flash's score in Terminal-Bench. In xhigh thinking mode, Hydrogen scores 54 on the Artificial Analysis Intelligence Index, compared to Argon's 50. Google is simultaneously rolling out Gemini 4 Hydrogen to Google Search globally, describing the goal as delivering more helpful, visual, and intuitive responses.