Gemini 4 Hydrogen replaces 3.8 Flash for free: What Google’s new AI brings for you

Google has made the biggest upgrade to Search and the Gemini app this year silently. If you have used Google Search or the Gemini chatbot recently, there is a good chance your answers were powered by Gemini 3.8 Flash — Google’s workhorse AI built for speed over deep thinking. Google has officially retired the “Flash” name and replaced it with Gemini 4 Hydrogen – your new standard AI model in Gemini.

Gemini 4 Hydrogen comes on the heels of Google releasing its more powerful alternatives – Gemini 4 Argon and Gemini 4 Carbon. With Gemini 4 Hydrogen, Google’s default, free AI just got 2.5 times faster, significantly more accurate, and far better at actually getting things done—all without costing you a dime extra.