Nano Banana Pro vs Stable Diffusion
A practical comparison of two image models: what each does best, what it costs, and how they differ on the same prompts.
Quick verdict
Google’s Gemini 3 Pro Image: photoreal scenes with world knowledge, up to 4K.
Choose Nano Banana Pro for
- Photoreal lifestyle and portrait images
- Image editing and multi-reference compositing
- Infographics that need factual detail
Stability AI
The open-source image model with the largest ecosystem.
Choose Stable Diffusion for
- Tinkerers and self-hosting
- Precise control with ControlNet
Specs side by side
| Spec | Nano Banana Pro | Stable Diffusion |
|---|---|---|
| Developer | Stability AI | |
| Type | image | image |
| Where to use it | AiLoft web app, Gemini app, Gemini API / Vertex AI | Open weights for local use (ComfyUI, Automatic1111, Forge); Stability API |
| Price | 10 credits / image | Free to run locally under Stability’s community license; API priced per image. |
| Open weights | No | Yes |
| Resolutions | 1K · 2K · 4K | — |
| Aspect ratios | 1:1 · 2:3 · 3:2 · 3:4 · 4:3 · 9:16 · 16:9 | — |
| Reference / start images | Yes | — |
| Transparent background | No | — |
Same prompt, side by side
Stable Diffusion isn’t on AiLoft, but you can run these prompts on Nano Banana Pro and compare with your own Stable Diffusion results.
Text rendering
What it testsSpelling, kerning and layout of a multi-line headline.
A minimalist concert poster for a jazz night called "BLUE HOUR SESSIONS", date "FRI 14 NOV", deep navy background, a single brass trumpet lit by a warm spotlight, Swiss-style typography, generous negative space
Photorealism
What it testsSkin texture, natural light and believable depth of field.
Candid street portrait of an elderly fisherman mending a net at golden hour, weathered skin, salt in his beard, harbor bokeh behind him, shot on 85mm f/1.8, natural color grading
Product shot
What it testsMaterials, reflections and clean e-commerce lighting.
Premium product photo of a frosted glass perfume bottle with a brushed gold cap on a travertine plinth, soft window light from the left, subtle shadow, beige seamless backdrop, 1:1
Complex scene
What it testsCounting objects and placing many elements correctly.
Isometric illustration of a tiny cozy bookshop: three shelves, a sleeping orange cat on the counter, a red bicycle outside the door, two customers reading, warm evening lights, pastel palette
Strengths and limitations
Nano Banana Pro
- Photorealism with accurate lighting and materials
- Blends up to several reference images into one scene
- Keeps characters consistent across edits
- Flat price for 1K, 2K and 4K output
- No transparent background output
- Fewer aspect ratios than GPT Image 2.5
- Slower than Nano Banana 2 on simple prompts
Stable Diffusion
- Runs fully offline on your own GPU
- ControlNet, LoRA and checkpoint ecosystem
- No per-image cost when self-hosted
- Steeper learning curve
- Base models lag frontier models on text and complex prompts
Real examples
FAQ
Is Nano Banana Pro better than Stable Diffusion?
Neither wins everywhere. Nano Banana Pro’s standout strength: photorealism with accurate lighting and materials. Stable Diffusion’s standout strength: runs fully offline on your own gpu. The quickest way to decide is to run your own prompt on both.
Which is cheaper, Nano Banana Pro or Stable Diffusion?
Nano Banana Pro: 10 credits / image Stable Diffusion: Free to run locally under Stability’s community license; API priced per image.
Can I use Nano Banana Pro and Stable Diffusion in one place?
Nano Banana Pro is available on AiLoft, where you can compare it against other models in one click. Stable Diffusion has to be used through: Open weights for local use (ComfyUI, Automatic1111, Forge); Stability API.
Are Nano Banana Pro and Stable Diffusion open source?
Nano Banana Pro is closed. Stable Diffusion has open-weight variants.
Stop guessing — compare on your own prompt
Pick up to 4 image models (or 3 video models), write one prompt, and see every result side by side.