NEW · Severity Normal. On November 12, Google launched Gemini 4 Hydrogen, a faster Gemini 4 model for everyday coding and agentic workflows, across the Gemini app, API, AI Studio, business tools and Google Search. Google reports an Artificial Analysis Intelligence Index score of 51 at high thinking versus 50 for Gemini 4 Argon, rising to 54 at xhigh; these are vendor-reported claims. What changed: broad rollout of a new 1M-context multimodal model with four thinking levels and up to 64K default synchronous output tokens. Who it affects: Gemini users, developers, enterprise teams and AI Pro/Ultra subscribers using Antigravity. Action: test Hydrogen on latency-sensitive tasks and compare output quality, token use and pricing against current models. Deadline: none announced.