ForecastGooglelanguage model

Gemini 3.9 Flash has not been announced. Based on how often Google ships new versions, our forecast is that it arrives around November 3, 2026, probably between October 30, 2026 and November 17, 2026.

The forecast

Most likely	November 3, 2026
Window	October 30, 2026 to November 17, 2026
Chance it arrives in that window	About 54%
Follows	Gemini 3.8 Flash (out September 2, 2026)
Based on	3 earlier gaps between versions

How we got this

Google is the maker of Gemini 3.8 Flash. We look at the gaps between its earlier versions (Gemini 3.5 Flash, 2026-05-19; Gemini 3.6 Flash, 2026-07-21; Gemini 3.7 Flash, 2026-08-13; Gemini 3.8 Flash, 2026-09-02) and project the next one. It is a guess from a pattern, not news: the maker has not said Gemini 3.9 Flash exists. This page turns into the launch page, with price and facts, as soon as the model shows up on OpenRouter, Hugging Face or GitHub.

Available now from Google

Predicted automatically by Modelcast. Not affiliated with Google.