Google brings Gemini 4 Hydrogen to Search worldwide

Google said on November 12 that Gemini 4 Hydrogen is now the model behind Google Search, and that it is live globally for all users. Robby Stein, vice president of product for Search, described the rollout as the largest model change Search has received. According to the post, the upgrade improves how Search reads complicated, multi-part questions and misspelled requests, and follows instructions and calls tools more precisely. The model also strengthens the query fan-out technique that runs related searches at once, which Google says surfaces links users might otherwise have missed. Answers are more visual, with images, comparison tables, structured layouts and purpose-built tools, and the company says language understanding improved across all supported AI Mode languages.