# Google makes Gemini 4 Hydrogen the default in AI Mode

_Published Saturday, November 14, 2026 at 9:18 AM EST · AI, Products · Latest · Tier 2 — Notable_

![Google makes Gemini 4 Hydrogen the default in AI Mode — Primary](https://cdn.searchenginejournal.com/wp-content/uploads/2026/11/seo-pulse-november-12-2026.jpg)

Google made Gemini 4 Hydrogen the default model in AI Mode on Nov. 12 and began using it for some AI Overview questions, Search Engine Journal reported. Google said the model is available everywhere in Search to everyone.

The company says Hydrogen improves the process of expanding a question into related searches, connecting users to a broader range of links. It supplied no link counts. The switch came two days after Google's November core ranking update began, creating overlapping changes for publishers assessing search citations and referral traffic.

## Sources

- [Search Engine Journal](https://www.searchenginejournal.com/seo-pulse-core-update-chatgpt-business-hub-ai-modes-new-model/597135/)

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Canonical: https://techandbusiness.org/newswire/juqsiBE0BA0xBg0STahAz0
Published: 2026-11-14T14:18:45.588Z
Story chronology: 2026-11-12T00:00:00.000Z
Retrieved: 2026-11-15T01:02:05.203Z
Publisher: Tech & Business (techandbusiness.org)