Google Gemini 4 Hydrogen: a cheaper model for AI agents, available to everyone

On 12 November 2026 Google launched Gemini 4 Hydrogen, a lower-cost model in the Gemini 4 family built for agentic tasks. The API costs $1.50 per million input and $7.50 per million output tokens.

On 12 November 2026 Google launched Gemini 4 Hydrogen, a new and cheaper model in the Gemini 4 family. According to Google's official blog and 9to5Google it targets agentic workflows, where the model plans steps and calls tools on its own. Unlike the earlier Argon model it did not go through a staged rollout: it is available immediately.

Price is the main story. Hydrogen costs $1.50 per million input tokens and $7.50 per million output tokens, and reports say one rate covers the whole one-million-token context window with no long-context surcharge. Argon has introductory prices of $2 and $10 that double to $4 and $20 after 30 November. Reports say Google states that Hydrogen outscores Argon on an independent intelligence ranking.

Where can you get it? Reports say it is in the Gemini API and Google AI Studio across tiers, in Android Studio, in Google Antigravity for Google AI Pro and Ultra subscribers, and in business Gemini including Gemini in Google Sheets. In the Gemini app free users get it through automatic model selection, and it is also rolling into Google Search worldwide. Mind the free API tier: reports say Google may use data from it to improve its products, while the paid tier is excluded.

Is it worth switching? If an agent runs on a pricier model today and most of its steps are routine, such as sorting email, extracting invoice data or answering from a company knowledge base, test Hydrogen on your own data. Measuring quality and cost on real cases matters more than leaderboards.