Gemini 3.8 Flash Keeps the 3.7 Price and Adds a Cyber Variant

Google introduced Gemini 3.8 Flash and Gemini 3.8 Flash Cyber on 2 September 2026. The post, from Tulsee Doshi and Raluca Ada Popa, calls 3.8 the best reasoning and coding model the Flash line has shipped, at the speed and price of 3.7. It is the third Flash release in six weeks, following 3.7 three weeks earlier.

The general model is aimed at software engineering, agent tasks, and multi-step reasoning. Google says developers can use it through the Gemini API, AI Studio, Android Studio, and agent workflows in Antigravity, and that enterprises can reach it on the existing cloud surfaces. The introductory price matches 3.7 Flash: $0.75 per million input tokens and $3.75 per million output tokens. That rate runs through 31 December 2026. From 1 January 2027 the listed price steps up.

The cyber variant is not a public endpoint

Gemini 3.8 Flash Cyber is described as a vulnerability-detection and automated-patching model. Access is through the Fairwind program, for a set of trusted defenders such as critical-infrastructure operators and software maintainers. It is not the default API model under the public price.

The split is the product fact. One Flash build stays a cheap workhorse for agents and coding. The other stays inside a defender program. Teams pricing agent traffic against 3.7 can treat 3.8 Flash as the same introductory bill until the end of 2026, and should not assume the cyber weights are part of that bill.

Source: Google, 2 September 2026.