Gemini 4 Hydrogen: what it is, what changes in the Gemini app and Google search

Gemini 4 Hydrogen is Google's new fast artificial intelligence model, presented on November 12, 2026. It replaces Gemini 3.8 Flash and Google describes it as its model for everyday agent workflows: multi-step tasks where AI searches, uses tools, and acts on your behalf.

Where it can be used

• Gemini app: also available to free users; the app automatically selects it when convenient.
• Google search engine: Google is deploying it in its AI functions.
• Developers and businesses: through the Gemini API.

The rollout is global and progressive, so it may take a few days to appear.

Hydrogen vs. Argon

What's improved, according to Google

• Fewer inventions: Google claims it makes more than five times fewer invented statements than the previous version. This is a figure from the company itself, still to be independently verified.
• Better tool usage: designed to chain steps (search, compare, fill in, summarize).

Price for developers

• $1.50 per million input tokens.
• $7.50 per million output tokens.

How to make the most of it

1. Ask for complete tasks, not just questions: "compare these three laptops and make me a table."
2. Ask it to cite sources when searching for information.
3. Always review important data: fewer errors doesn't mean zero errors.

Frequently asked questions

Is Gemini 4 Hydrogen free? Yes, it's available in the free Gemini app, which selects it automatically.

What's the difference with Gemini 4 Argon? Hydrogen is the fast and affordable model; Argon is the most advanced.

Is it available in Spanish? Gemini works in Spanish and the rollout is global.

Sources: Google's official blog ("Introducing Gemini 4 Hydrogen for Agentic Workflows"), Zee Business, and other specialized publications.