Google introduces Gemini 4 Hydrogen model

Google has introduced Gemini 4 Hydrogen, a model it describes as built for speed and efficiency in everyday coding and agentic workflows, and it is rolling out today across developer, enterprise and consumer surfaces. Google says Hydrogen scores 51 on the Artificial Analysis Intelligence Index at its default high thinking level, ahead of Gemini 4 Argon's 50, and is priced at $1.50 per million input tokens and $7.50 per million output tokens. The company also introduced Orchestrator in Google Antigravity, which switches between Carbon and Hydrogen within a session and, on Terminal-Bench 4.0, reached near-Carbon task success while consuming 24% less quota on average.