Gemini 3.6 Flash Migration: 5 Critical API Changes That Will Break Your Code (And How to Fix Them)

Gemini 3.6 Flash & 3.5 Flash-Lite Are GA: What Breaks, What’s Better, and How to Migrate Google just made Gemini 3.6 Flash and Gemini 3.5 Flash-Lite generally available. That means they are production-ready, right now. I’ve dug through the official release notes, and here’s the thing: these aren’t just “better models.” They come with API changes that will break your existing code if you aren’t paying attention. Specifically, temperature, top_p, and top_k are being shown the door. This post cuts through the marketing. I’ll tell you exactly what each model does well, which one you should pick for your workload, …