Gemini 4 Hydrogen in Google Search (AI Mode)
Google rolled out Gemini 4 Hydrogen to all Search users globally, which it calls the biggest model upgrade to Search yet, with better intent understanding, query fan-out and visual answers.
Search now uses Gemini 4 Hydrogen, which follows instructions and calls tools more precisely, so it handles multi-part questions, typos and very specific requests. Its reasoning improves query fan-out, which runs simultaneous subqueries and surfaces a wider range of links. Responses show more images, structured answers, comparison tables and custom tools, and answers improve across all supported AI Mode languages.
- Date
- Thursday 12 November 2026
- Lab
- Kind
- feature
- Access
- app only
Figures
| Measure | Value | Measured by |
|---|---|---|
| Task speed versus Gemini 3.8 Flash | 2.5x faster Reported for the Hydrogen model generally, not for Search specifically | company |
This is an upgrade of the existing AI Mode in Search (record google-ai-mode); Hydrogen is also coming to AI Studio, the Gemini API and the Gemini app.
Sources
- blog.google/products-and-platforms/products/search/gemini-4-hydrogen-search-upgrade/
- techcrunch.com/2026/11/12/googles-latest-search-upgrade-promises-better-answers-to-your-mo
This record was checked against its sources on 12 November 2026. How we check