Nano Banana AI 影像生成

Nano Banana is Google's production image generation family on FlyAIgh, ported from the Gemini image stack. Three variants: Nano Banana 2.1 is the newest release at 2 to 7 credits per image depending on resolution, Nano Banana 2 is the everyday workhorse at 4 to 8 credits, and Nano Banana Pro is the flagship at 8 to 13 credits with 4K output and AI image editing.

Nano Banana 2.1 is the first variant to try. It renders at 1K, 2K or 4K, supports both text-to-image and image-to-image, takes up to 14 reference images in one edit, and offers fourteen aspect ratios — from 1:1, 16:9 and 9:16 to the ultrawide 21:9 and the extreme 1:4, 4:1, 1:8 and 8:1 strips. It is built for sharper detail and for keeping earlier edits intact across repeated rounds, so you can keep refining the same image without the rest of it drifting.

Nano Banana 2 covers the basics: five aspect ratios (1:1, 16:9, 9:16, 4:3, 3:4) and quality output suitable for social, blog illustrations, and prompt iteration.

Nano Banana Pro upgrades on three axes. First, output goes to 4K — useful for print, banner ads and any context where you'll crop in or scale up. Second, it supports image-to-image editing with up to 8 reference images plus a text instruction ('replace the background with a snowy mountain', 'change the jacket to red'). Third, the underlying model has noticeably better text rendering and finer detail handling, which makes it the workhorse for hero shots and product photography.

Nano Banana is particularly strong at photorealism, faces, hands (notoriously hard for image models) and on-image text. It is weaker than Midjourney for highly stylized illustration. Pick Nano Banana when realism, text-on-image and editing capability matter; pick Midjourney or WAN when you want a more distinct aesthetic.

All variants work on every plan, including free accounts (which get a protected preview).