Google launches Gemini 4 Hydrogen, replacing Flash models

Google announced Gemini 4 Hydrogen on November 12, 2026. The model replaces the Gemini 3.8 Flash family in the company’s AI‑powered services, from Search to the Gemini app. Access is open to everyone today, and the model is also included for paid Google AI Pro and Ultra subscribers. Hydrogen runs in four “thinking” levels – low, medium, high (the default) and a new xhigh tier – letting users trade off speed, cost and answer quality. Google says Hydrogen is 2.5 times faster than Flash 3.8 even at the high setting. In its own tests the model cuts fabricated claims by more than five‑fold and triples the score on the Terminal‑Bench code‑generation benchmark. On the Artificial Analysis Intelligence Index Hydrogen scores 54 at xhigh, edging out the Argon model’s 50. The rollout follows a staged launch that began with cybersecurity researchers for the Argon and Carbon models. Unlike those frontier models, Hydrogen is meant for everyday tasks – quick coding, document drafting, data‑analysis and multi‑step agentic workflows. Google also introduced an Orchestrator feature that can automatically switch between Carbon, Argon and Hydrogen within a single session, saving up to 24 % of token quota and finishing work 19 % faster in tests. Pricing is flat across the model’s 1 million‑token context window: $1.50 per million input tokens and $7.50 per million output tokens. This makes Hydrogen cheaper to run than the older Flash models, which charged higher rates for the same token volume.

Why it matters

For developers and business teams, Hydrogen promises quicker code fixes and lower AI costs, letting projects move faster without inflating budgets. For regular users, the upgraded Search and Gemini app should give clearer answers and fewer unnecessary prompts, making everyday tasks like drafting emails or summarizing PDFs smoother.