Image Nano Banana 2 (Gemini 3.1 Flash Image Preview)
Gemini 3.1 Flash Image Preview (“Nano Banana 2”) is Google’s next-generation image generation and editing model, combining Pro-level visual quality with Flash-level speed and cost efficiency. It delivers stronger contextual understanding, high-fidelity image creation, and fast iterative editing for a wide range of creative and production workflows. Developers can customize output composition and aspect ratios through the image_config API parameter.