Gemini 4 Hydrogen: free links and price comparison

Google released its fast model Gemini 4 Hydrogen on November 12, 2026. On the Artificial Analysis Intelligence Index it scores 51 at its default setting; Argon, one of Google's frontier models, scores 50. It finishes tasks 2.5 times faster than Gemini 3.8 Flash. You can try it without paying in the places below.

Try it for free

• Gemini 4 Hydrogen in Google AI Studio: the try link from Google's announcement; sign in with a Google account. On the free tier your prompts can be used to improve Google's products; on the paid tier they are not.
• Gemini app: pick it in the model menu. Free users get it through auto model selection, when it fits the prompt.
• Google Search: nothing to set up, it is live for all users.

Price comparison (API, per million tokens)

Model	Input	Output	Note
Gemini 4 Hydrogen	$1.50	$7.50	Flat across the full 1M-token context; has a free tier
Gemini 4 Argon	$2.00	$10.00	$4.00 / $20.00 from December 1, 2026; no free tier
Gemini 3.8 Flash	$0.75	$3.75	$1.50 / $7.50 from January 1, 2027

So Hydrogen is cheaper than Argon, but twice the current price of 3.8 Flash. For deep architecture decisions, Google still points to Carbon and Argon.

Source: Google's announcement (November 12, 2026) and the Gemini API pricing page; checked on November 13, 2026. The scores come from Google's announcement.