Gemini 4 Hydrogen API Pricing and Day 0 Support on LiteLLM
LiteLLM now supports Gemini 4 Hydrogen on Day 0. Google built Hydrogen as the fast, everyday model for coding and agentic workflows, and it scores 51 on the Artificial Analysis Intelligence Index against Gemini 4 Argon's 50. Use it on Google AI Studio and Gemini Enterprise Agent Platform (formerly Vertex AI) through the LiteLLM AI Gateway, with spend, rate limits and logs in one place.