Google releases Gemini 4 Hydrogen, a fast model for coding and agents, to everyone

Google has released Gemini 4 Hydrogen, a faster and cheaper model in its Gemini 4 family, built for everyday coding and agent tasks. With it, Google says it is bringing Gemini 4 to everyone. Hydrogen is rolling out in the Gemini app, in Google Search for all users, and to developers and businesses through the Gemini API, the company .

Google's bigger models, Gemini 4 Carbon and Argon, are meant for long, hard reasoning jobs. Hydrogen is meant to do the routine work quickly: writing code, running tests and checking changes. Google says it scores 51 on the Artificial Analysis Intelligence Index, an independent benchmark, against 50 for Argon, and 54 at its highest reasoning setting. Compared with the older Gemini 3.8 Flash it finishes tasks 2.5 times faster, scores 57% instead of 18.2% on Terminal-Bench 4.1, a coding-agent test, and makes up facts less than a fifth as often.

Developers pay $1.50 per million tokens of input and $7.50 per million tokens of output (a token is roughly a short word), with the same price across the full 1 million-token context.

In Google Antigravity, its coding tool, a new lets Carbon plan the work and hands the routine steps to Hydrogen. In Search, Google says Hydrogen and gives more visual answers with a wider range of links.