So, what exactly is Gemma 4? It is basically the lightweight open-weight alternative to the massive Gemini models. Google changed the architecture to make these models work on different types of hardware. For example, if you are a desktop user, you can use Gemma 4 31B, which specializes in deep reasoning and complex coding. It is ideal for high-end GPUs. Gemma 4 26B is another capable model if you have a low-end GPU. It activates only 4 billion parameters at a time, and it strikes the perfect balance between speed and intelligence. Edge models are where things get interesting for mobile users.