Cheap and fast with a free API tier, but Google now calls it a legacy preview, so it is a poor base for new projects.
Kenning's take
What it does
Gemini 3 Flash brought Gemini 3's reasoning to a faster, lower-cost model. Google said it beat Gemini 2.5 Pro on several benchmarks while running about three times faster. It rolled out in the Gemini app, AI Mode in Search, the Gemini API and Vertex AI; Google now calls it a legacy preview model.
- Adjustable thinking levels
- Multimodal input including audio and video
- Available in Gemini CLI and Antigravity
- Free tier in the Gemini API
Who it suits. Developers wanting a cheap fast model and Gemini app users.
Key facts
- Category
- AI models
- Part of
- Google Gemini
- Made by
- Based in
- United States
- Released
- 17 December 2025
- How to get it
- Gemini app, AI Mode in Search, Gemini API (gemini-3-flash-preview), Vertex AI and Gemini Enterprise
- Works on
- API, Web
- In the UK
- Yes
- Free plan
- Yes, Gemini API free tier
- API price
- $0.50 per million input tokens (text/image/video), $1 audio, $3 per million output tokens
FAQ
When was Gemini 3 Flash released?
Google released it on 17 December 2025.
How much does Gemini 3 Flash cost?
$0.50 per million input tokens and $3 per million output tokens on the paid API tier, with a free tier too.
Facts from the maker's own pages and the sources listed. Checked 2026-10-11.
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