Sources
Google Search gets a major upgrade with Gemini 4 Hydrogen
Google is rolling out Gemini 4 Hydrogen across Google Search globally for all users, calling it the biggest model upgrade to Search yet.
- Hydrogen is live globally in Search for all users as of the Nov 12, 2026 post.
- Google calls it the largest model upgrade Search has had.
- Upgraded query fan-out is said to surface a wider set of outbound links than before.
- Responses extend to all languages supported in AI Mode.