Google Search gets a major upgrade with Gemini 4 Hydrogen
Google Search rolls out Gemini 4 Hydrogen globally to all users, which the company calls its biggest model upgrade to Search yet. Key changes include better handling of complex multi-part questions and typos, enhanced reasoning for query fan-out to surface more relevant links, more visual responses with images and comparison tables, and richer understanding across all supported AI Mode languages.
The official announcement lists four concrete improvements in intent understanding, query fan-out, visual responses, and language support, letting readers assess how the Search experience actually changes.











