Gemini 4 Hydrogen is free, but the free app picks when you get it

Gemini 4 Hydrogen came out on Nov 12, 2026, and Google says it brings Gemini 4 "to everyone." That is true, with one detail most launch videos leave out: in the free Gemini app you don't choose Gemini 4 Hydrogen yourself. The app uses it when its automatic model selection decides it fits your prompt.

What Gemini 4 Hydrogen is

Google describes Hydrogen as its model for speed and efficiency in everyday coding and agent tasks. It has four thinking levels (low, medium, high and xhigh) and a 1 million token context window. In Google Antigravity, a tool called Orchestrator can switch between Hydrogen and the larger Gemini 4 Carbon and Argon models during one task.

Google's own tests say it finishes tasks 2.5 times faster than Gemini 3.8 Flash at its default setting. These are Google's numbers, not an outside test.

Who gets Gemini 4 Hydrogen

The announcement lists "all tiers of Google AI Studio, the Gemini API, Gemini for business, the Gemini app, Google Search." A footnote adds that "in the Gemini app, free users will get access to Gemini 4 Hydrogen via auto model selection when it's the appropriate model for the prompt."

Google AI Pro and Ultra subscribers also get it in Gemini in Google Sheets, and in Google Antigravity.

The Gemini 4 Hydrogen price

On the API, Hydrogen costs $1.50 per million input tokens and $7.50 per million output tokens, the same across its whole context window. Gemini 3.8 Flash costs $0.75 and $3.75 at its introductory price, so Hydrogen is twice as expensive per token. Google says it uses fewer tokens per task, which narrows that gap on some jobs.

Google AI Studio's free tier includes Hydrogen with basic limits.

FAQ

Is Gemini 4 Hydrogen free?

Yes, in a limited way. Free Gemini app users get it when auto model selection picks it, and Google AI Studio's free tier includes it with basic limits.

How much does Gemini 4 Hydrogen cost on the API?

$1.50 per million input tokens and $7.50 per million output tokens, flat across the 1 million token context.

Is Gemini 4 Hydrogen better than Gemini 3.8 Flash?

Google's tests show it 2 to 2.8 times faster with 12% to 23% fewer tokens on coding and agent tasks, at twice the per-token price.

Sources

• Google: Introducing Gemini 4 Hydrogen
• Gemini API: pricing