Google Launches Gemini 4 Hydrogen Across Search, Gemini App, and Chrome

Key Info

Google introduced Gemini 4 Hydrogen, the latest model in the Gemini 4 series following Argon and Carbon, and began rolling it out globally today across desktop, mobile, and web, including Google Search, the Gemini app, and Chrome.

Highlights

• Free users access Hydrogen through auto model selection when it is deemed the appropriate model for a prompt; AI Plus, Pro, and Ultra subscribers can pick it directly from the model dropdown.
• Paid Google AI Pro and Ultra subscribers can also try it in Google Antigravity.
• Google says the model is built with strong safeguards and targets speed and efficiency for everyday work, including visual answers in Search, writing/research/prototyping in the Gemini app, and everyday coding and agentic workflows.
• In a demo, Hydrogen simulated real-time light refraction, reflection, and color dispersion in an interactive 3D water and glass visualizer using WebGL2 and pure math.