Google announces Gemini 3.6 Flash and cybersecurity AI

July 21, 2026 — 3.6 Flash replaces 3.5 Flash as workhorse; 3.5 Flash-Lite for high throughput; 3.5 Flash Cyber restricted via CodeMender to governments/trusted partners (dual-use). Gemini 3.5 Pro still in partner testing; Gemini 4 pre-training started.