Differences Between the Three Nano Banana Image Models
Google’s guide compares three Nano Banana image models: the original Nano Banana, Nano Banana 2 (Gemini 3.1 Flash Image), and Nano Banana Pro. Choosing the right one helps you write better nanobanana prompts and pick the right nanobanana entry for nanobanana2.
Summary table
| Model | Role | Notes |
|---|---|---|
| Nano Banana (v1) | Fastest, lowest cost | Legacy choice; Google suggests new projects default to NB2 |
| Nano Banana 2 | Default for most work | ~95% of Pro capability at much lower price; Flash speed + strong quality |
| Nano Banana Pro | Flagship | Best image quality; use for the hardest multi-layer prompts |
Nano Banana 2 highlights
- Image grounding: Can use web search to ground real-world objects (landmarks, species); not for people’s likeness.
- Resolutions: 512px through 4K; extreme ratios like 1:8 and 1:4 for banners and scroll layouts.
- Batch workflow: Generate many 512px variants cheaply, then upscale winners to 1K–4K.
Thinking mode
Google suggests leaving “thinking” off for normal generation; turn on only for nonsense outputs, very complex diagrams, or deep grounding + spatial reasoning.