Google Rolls Out Gemini 4 Hydrogen to Replace 3.8 Flash: 5x Fewer Hallucinations, 3x Terminal-Bench Jump — and a Periodic Table Naming Mess
Google has officially rolled out Gemini 4 Hydrogen, replacing the long-serving 3.8 Flash: fabricated claims cut by more than 5x, Terminal-Bench 4.1 jumping from 18.2% to 57%, priced at $1.50 per 1M input tokens. The accompanying Orchestrator mode lets Carbon and Hydrogen dynamically tag-team within a single task, saving 24% quota and finishing 19% faster. But the confusing element-based naming, the de facto disappearance of the entry price tier, the removal of explicit caching APIs, and the deprecation of sampling parameters drew heavy criticism in a 558-point Hacker News thread. This article summarizes the official migration checklist and community reactions.





