Google launched Gemini 4 Hydrogen and rolled it out globally in Google Search for all users, alongside access through the Gemini app, AI Studio, Gemini API, and Google Antigravity. Artificial Analysis scored it 51 at the default High setting versus Argon’s 50 and 54 at xhigh, while Terminal-Bench 4.1 placed it at 57%, behind Claude Sonnet 5.5’s 63.9%; Google also introduced Orchestrator to switch between Carbon and Hydrogen within Antigravity sessions.