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Google released its Gemini 4 Hydrogen model on November 12, 2026, saying it gives more helpful answers to complex questions, including multi-part and highly specific requests. The model is available in Search, the Gemini app, Google AI Studio, the Gemini API and Gemini for business. The model replaces 3.8 Flash and was rolled out without the slower, security-conscious release used for earlier versions, according to Ars Technica. TechCrunch reported that Google's AI Mode in Search also now uses the model for complex queries.