Nano Banana 2: FAQ

1. What is Nano Banana 2?

Nano Banana 2 (Gemini 3.1 Flash) is a fast, versatile image model for text-to-image and reference-guided generation. It's a strong general-purpose pick, generates in roughly 4 to 6 seconds, and renders text well (around 90% accuracy). It works for both creating new images and editing existing ones.

2. What resolutions does Nano Banana 2 support?

• 512 (draft quality)

• 1K (fast)

• 2K (default)

• 4K (highest quality, slowest)

3. What aspect ratios are available?

14 ratios in total.

• Standard: 21:9, 16:9, 4:3, 3:2, 5:4, 1:1, 4:5, 2:3, 3:4, 9:16

• Extreme: 4:1, 1:4, 8:1, 1:8 (for banners and panoramas)

4. Can you use reference images?

Yes. Nano Banana 2 accepts up to 14 reference images for style or content guidance. When using two or more, label each image's role in the prompt (style, character, pose, or composition reference).

5. What controls does Nano Banana 2 offer?

• Thinking level: minimal (default, fastest), low, medium, or high. Higher levels improve complex compositions but run slower.

• Temperature: 0.0 to 2.0 (default 0.5). Lower for consistency, higher for variety.

• Search grounding: optionally generate images informed by real-time web data, useful for factual content like weather, charts, or current events.

6. Does Nano Banana 2 support transparency?

No. Nano Banana 2 does not output transparent backgrounds. For transparent (RGBA) cutouts, use a model that supports it, such as GPT Image 1.5.

At a glance