Gemini 4 Hydrogen

Gemini 4 Hydrogen is the speed-focused member of Google's Gemini 4 family, adapted from Gemini 4 Carbon. It supports text, images, audio, and video inputs with a 1M-token unified context window and up to 64K default output tokens (1M via long decode). It offers four thinking levels (low, medium, high default, xhigh) for trading latency and cost against depth, scores 51 on the Artificial Analysis Intelligence Index at default high (54 at xhigh), and runs 2.5x faster than Gemini 3.8 Flash on many tasks while reducing fabrications over 5x. Available immediately across Gemini API, AI Studio, Gemini app, Google Search, Antigravity, and business tools at flat $1.50/$7.50 per million tokens.