Gemini 4 Hydrogen reportedly reaching all Gemini app users

According to a post on Threads, Gemini 4 Hydrogen is rolling out to all users in the Gemini app, in what the author calls a fast, gradual rollout. Google did unveil Hydrogen on November 12, but the all-users claim rests on that single post, which says an official announcement will likely come soon.
Google pitches Hydrogen as a fast model built for agentic workflows, and it skips the “Flash” branding. The frontier models in the same family are Gemini 4 Carbon and Gemini 4 Argon.
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