Google launches Gemini 4 Hydrogen for free and paid users

Google has begun rolling out Gemini 4 Hydrogen worldwide for coding and tasks handled by AI agents.

It is the third model in the Gemini 4 family, after Argon and Carbon, which are designed for deeper reasoning.

Google says Hydrogen is built for everyday use and completes tasks about 2.5 times faster than Gemini 3.8 Flash.

In Google's comparisons, it led on seven of 10 measures, while Anthropic's Claude Sonnet 5.5 led on three.

Its API costs $1.50 per million input tokens and $7.50 per million output tokens, with a context window of one million tokens.

Free users can access it through the Gemini app's automatic model selection, and it is also available in Google Search and developer tools.

Google says the rollout began on November 12 and is proceeding worldwide, but gives no end date.