This is a submission for the Gemma 4 Challenge: Write About Gemma 4
Gemma 4 Explained: Which Model Should You Use and Why It Changes Everything for Local AI
I built an offline AI crop diagnostic tool for Indian farmers using Gemma 4. During that process I made every possible mistake - downloaded the wrong model variant, crashed my system, misunderstood what "E4B" meant, and spent hours confused about why multimodal wasn't working.
This article is what I wish I had read before starting.
By the end you'll know exactly which Gemma 4 model to use for your use case, what makes the architecture genuinely different from anything before it, and why this family of models is a bigger deal than most developers realize.
