Google has begun rolling out Gemini 4 Hydrogen, pitching it as a faster model that can handle tangled, multi-part questions and make Search’s AI answers more useful. Google says it can “break down your questions and address each part” of a response.¹

The launch is framed as a practical upgrade rather than a new top-end reasoning model: Hydrogen replaces the faster Gemini 3.8 Flash, with four thinking settings and, according to Google, task completion up to 2.5 times faster. CEO Sundar Pichai promoted it as bringing “cutting-edge intelligence to everyone” for everyday tasks and coding.Sundar Pichai (sundarpichai)²

In Search, Google says the model is better at interpreting typos and specific requests, and can return more links by splitting a question into related searches. Answers may also include images, comparison tables, graphs and maps. Google called it the “biggest model improvement to Search yet”; the upgrade is rolling out globally.³ A post amplified by Pichai likewise described the Search upgrade as available to users worldwide.Sundar Pichai (sundarpichai)⁴

The access picture beyond Search is more complicated. One account says Hydrogen is available across all tiers of the Gemini app and AI Studio, while another says free Gemini users and AI Plus subscribers remain on an older model, with Hydrogen limited in the app to Pro and Ultra subscribers. Both accounts describe broad Search availability, but their differing descriptions of access elsewhere leave users with a less sweeping rollout than the launch messaging suggests.⁵