How I Speed-Tested 15 AI Models in 2026 — And What Actually Matters for Your App

Look, I'm gonna be honest with you. When I first started building AI-powered apps, I thought quality was everything. You know, the whole "my model writes better poetry than yours" vibe. But after shipping a few products that users actually hated? I learned the hard way that speed is the real king. Every 100ms of delay? That's not just a number — it's a user closing your tab. I've seen it happen. A buddy of mine lost 40% of his chat app users just because his model took 2 seconds to start respon...