This is a submission for the Gemma 4 Challenge: Write About Gemma 4 A few weeks ago, I asked myself a simple question: what would it take to build an AI that could walk a frightened person through a medical emergency — without typing a single word? They'd need to show the situation. Speak the emergency. Get guided through it, step by step, in plain language, with their hands free. That question led me to build Med-first — and it led me straight to Gemma 4. Because Gemma 4 is the first open model I've encountered where the answer to that question is: yes, all of that is actually possible in one API call. This post is about what Gemma 4 unlocked, how I built it, and — if you're a developer in Africa or anywhere compute access has historically been a barrier — why this release matters more than the benchmarks suggest. What Is Med-first? Med-first is a browser-based emergency first aid assistant. Open it on any phone, no install, no login.…