This is a submission for the Gemma 4 Challenge: Write About Gemma 4 I Replaced My $500 GPU with a $75 Raspberry Pi: How Gemma 4 Makes Computer Vision 10x Cheaper Native object detection without YOLO, OpenCV, CUDA, or cloud APIs. Just Gemma 4 multimodal AI running 100% offline on a single-board computer. TL;DR — What You'll Learn Metric Traditional CV Gemma 4 Vision Total Cost $500–2000 (GPU + cloud) $75 (Raspberry Pi 5) Monthly Bill $20–100 cloud fees $0 (runs offline) Setup Time 2–4 hours of dependency hell 20 minutes Code Complexity 500–1000 lines 50 lines Dependencies 10+ (OpenCV, CUDA, etc.) 3 (torch, transformers, Pillow) Power Draw 150–300W 7.5W Accuracy (COCO) ~90% ~85% Zero-Shot Detection ❌ Requires training ✅ Works out of box The trade-off: 5% accuracy drop for 90% cost reduction and 10× simpler setup . For home automation, accessibility tools, and hobby robotics, this trade is obvious.…