Google is letting staff test a 'fast' new Gemini AI model named Hydrogen

Google announced the release of Gemini 4 Hydrogen, bringing speed and efficiency for everyday coding and agentic workflows. According to blog.google, while frontier models like Gemini 4 Carbon and Gemini 4 Argon excel at deep reasoning on hard problems, Hydrogen is built for rapid execution across diverse agentic tasks. Business Insider reported that Google previously let staff test the fast new Gemini AI model named Hydrogen. Tom's Guide and Search Engine Journal reported that the model is free and has been made the default model in AI mode. FourWeekMBA reported that Gemini 4 Hydrogen hit Google's price list at $1.50 for input and $7.50 for output. blog.google stated that Hydrogen is priced flat across its entire 1 million-token context window at $1.50 per million input tokens and $7.50 per million output tokens. Hydrogen surpasses Argon on the Artificial Analysis Intelligence Index at its default high thinking level, scoring 51 compared to Argon's 50, and reaching 54 at its highest xhigh thinking setting, according to blog.google. The source text explains that Hydrogen often completes tasks faster than models in its class. In software development, teams rely on frontier models for deep architectural judgment, but they still need a fast execution model for writing code, running tests, and verifying changes. blog.google noted that Hydrogen is built to stand on its own as a model for everyday work or to pair with Carbon and Argon as a high-efficiency execution engine in multi-model workflows. To make multi-model collaboration automatic, Google introduced Orchestrator in Google Antigravity. Orchestrator dynamically switches between models like Carbon and Hydrogen within the same session. For teams migrating from Gemini 3.8 Flash, Hydrogen delivers significant leaps in speed and intelligence. blog.google stated that Hydrogen finishes tasks 2.5 times faster at its high default setting while more than tripling Terminal-Bench 4.1 scores at 57% versus 18.2%, cutting fabricated claims by more than 5 times, and adapting cleanly when tool calls fail or searches return empty. Hydrogen features four thinking levels including low, medium, high as the default, and a new xhigh tier. These levels offer a range of options across quality, latency, and cost. Hydrogen is rolling out globally across developer, enterprise, and consumer surfaces, including Google AI Studio, the Gemini API, Gemini for business, the Gemini app, Google Search, and paid Google AI Pro and Ultra subscribers in Google Antigravity.