Google Launches Gemini 4 Hydrogen, Its Model for Complex Multi-Part Questions

Google released Gemini 4 Hydrogen, a model that breaks multi-part questions into parts and answers each one, and handles typos and highly specific requests better. It is available today across Google Search, the Gemini app, Google AI Studio, the Gemini API, Gemini for business, and Google Antigravity for AI Pro and Ultra subscribers. It is now the default model in AI Mode and handles the hardest queries in AI Overviews.

Why it matters: Developers and businesses using the Gemini API or AI Studio can now test a model that Google has positioned for harder reasoning tasks, and the default switch in Search changes what answers millions of users see.