Gemini 3.5 Flash is here: Google’s smartest speed model promises better coding and agents

TL;DR At Google I/O 2026, Google has introduced the Gemini 3.5 family of AI models, starting with Gemini 3.5 Flash. Gemini 3.5 Flash is said to be four times faster than competing frontier models and outperforms Gemini 3.1 Pro on coding and agentic benchmarks. Gemini 3.5 Flash is rolling out globally as the default model for billions of users in the Gemini app and Google Search.