On Thursday Google is officially replacing the widely used Gemini 3.8 Flash model with the newly launched Gemini 4 Hydrogen across its entire product ecosystem.
Unlike the restrictive staged rollouts for recent Argon and Carbon releases, this launch begins immediately for general users without locking access behind the most expensive subscription tiers.
Performance figures place the new model up to 2.5 times faster than Flash 3.8 in high mode while cutting fabricated claims by more than 5x.
Developers receive a coding boost that triples Flash 3.8 scores on Terminal-Bench, with the xhigh thinking level managing to trade blows against the more powerful Argon model in intelligence benchmarks.
Search access will be available to everyone through the largest update to AI-powered tools, improving handling of long multipart questions and adding visual elements to AI Overviews.
Access remains uneven outside of search, where AI Pro and Ultra subscribers gain entry but free users still rely on the older Flash-Lite model, while developer API pricing stays unchanged.