# Nano Banana

> Everything about Nano Banana Pro and Nano Banana 2 on zurelay: sizes, prices, up to 14 reference images, editing, text in images and prompting.

Source: https://zurelay.com/docs/nano-banana

Google’s Nano Banana models make and edit pictures from text and up to 14 reference images, with crisp text in images and faithful edits.

## The models

|  | Nano Banana Pro | Nano Banana 2 |
| --- | --- | --- |
| ID | `nano-banana-pro` | `nano-banana-2` |
| Best for | The highest quality: detail, text, faithful edits | Speed and price, with very good quality |
| Prices | 1K and 2K $0.035, 4K $0.065 | 1K $0.025, 2K $0.034, 4K $0.058 |
| Resolutions | 1K, 2K, 4K | 1K, 2K, 4K |
| Aspect ratios | 10, from 21:9 to 9:16 | 10, from 21:9 to 9:16 |
| Reference images | up to 14 | up to 14 |

## Make an image

**Python** (`main.py`):

```python
import os
from openai import OpenAI

client = OpenAI(base_url="https://api.zurelay.com/v1", api_key=os.environ["ZURELAY_API_KEY"])

result = client.images.generate(
    model="nano-banana-pro",
    prompt="A minimalist poster for a jazz night: a brass saxophone in silhouette, the words 'Blue Hour' in tall serif letters, deep navy and gold",
    size="2K",
    extra_body={
      "aspect_ratio": "2:3"
    },
)
print(result.data[0].url)
```

**Node.js** (`index.mjs`):

```javascript
import OpenAI from "openai";

const client = new OpenAI({ baseURL: "https://api.zurelay.com/v1", apiKey: process.env.ZURELAY_API_KEY });

const result = await client.images.generate({
  "model": "nano-banana-pro",
  "prompt": "A minimalist poster for a jazz night: a brass saxophone in silhouette, the words 'Blue Hour' in tall serif letters, deep navy and gold",
  "size": "2K",
  "aspect_ratio": "2:3"
});
console.log(result.data[0].url);
```

**cURL**:

```bash
curl https://api.zurelay.com/v1/images/generations \
  -H "Authorization: Bearer $ZURELAY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "nano-banana-pro",
  "prompt": "A minimalist poster for a jazz night: a brass saxophone in silhouette, the words '\''Blue Hour'\'' in tall serif letters, deep navy and gold",
  "size": "2K",
  "aspect_ratio": "2:3"
}'
```

Sizes: `1K`, `2K` or `4K`, with any of ten aspect ratios (the full table is on [Image generation](https://zurelay.com/docs/images)). Without `size`, you get a 1K image.

## Edit and combine with references

Pass up to 14 images in `images` (or as files on `/v1/images/edits`) and say what to do with them. Nano Banana keeps faces, products and logos recognizable across edits.

**Python** (`main.py`):

```python
import os
import requests

response = requests.post(
    "https://api.zurelay.com/v1/images/generations",
    headers={"Authorization": f"Bearer {os.environ['ZURELAY_API_KEY']}"},
    json={
      "model": "nano-banana-pro",
      "prompt": "Studio product shot: the sneaker from the first image on the concrete block from the second, lit like the third image. Keep the sneaker's logo and colors exactly.",
      "images": [
        "https://example.com/sneaker.png",
        "https://example.com/concrete.jpg",
        "https://example.com/lighting-ref.jpg"
      ],
      "size": "2K",
      "aspect_ratio": "1:1"
    },
)
response.raise_for_status()
print(response.json())
```

**Node.js** (`index.mjs`):

```javascript
const response = await fetch("https://api.zurelay.com/v1/images/generations", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.ZURELAY_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "nano-banana-pro",
    "prompt": "Studio product shot: the sneaker from the first image on the concrete block from the second, lit like the third image. Keep the sneaker's logo and colors exactly.",
    "images": [
      "https://example.com/sneaker.png",
      "https://example.com/concrete.jpg",
      "https://example.com/lighting-ref.jpg"
    ],
    "size": "2K",
    "aspect_ratio": "1:1"
  }),
});
console.log(await response.json());
```

**cURL**:

```bash
curl https://api.zurelay.com/v1/images/generations \
  -H "Authorization: Bearer $ZURELAY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "nano-banana-pro",
  "prompt": "Studio product shot: the sneaker from the first image on the concrete block from the second, lit like the third image. Keep the sneaker'\''s logo and colors exactly.",
  "images": [
    "https://example.com/sneaker.png",
    "https://example.com/concrete.jpg",
    "https://example.com/lighting-ref.jpg"
  ],
  "size": "2K",
  "aspect_ratio": "1:1"
}'
```

## Prompting

### Describe a scene, not keywords

Write the way you’d brief a photographer: subject, setting, composition, light, lens or medium, mood. “A weathered fisherman mending a net on a pier at dusk, low warm light, 50mm, shallow depth of field” beats “fisherman, pier, dusk, 4k, masterpiece”.

### Text in images

Put the exact words in quotes and say where they go and how they look: “the headline ‘Grand Opening’ in bold white sans-serif across the top”. Keep each piece of text short.

### Edits

- Name the change and what must stay: “Change only the wall color to sage green. Keep the furniture, light and camera angle.”
- Edit in steps for big changes: one call per change, feeding each result into the next.
- Refer to references by order and role: “the person from the first image, the outfit from the second”.

### Shape and size

Pick the aspect ratio for where the image goes (9:16 for stories, 16:9 for headers, 4:5 for feeds). Draft at 1K, then make the keeper at 2K or 4K: the price is per image, by resolution.

## Good to know

- Images take 10 to 60 seconds, longer at 4K. Set a client timeout of 10 minutes, which leaves room for a retry.
- Prompts the model declines return `image_not_generated` with its reason, free of charge.
- Every image carries the lab’s invisible SynthID watermark, as it does from Google.
- Links last 24 hours; the Library in your dashboard keeps images returned as links for 30 days.

> **Try it without code:** The dashboard [Playground](https://zurelay.com/app/playground) has an image studio: drop in reference images, pick a size, and see the exact code for the request.

Model details and examples: [Nano Banana Pro](https://zurelay.com/models/nano-banana-pro), [Nano Banana 2](https://zurelay.com/models/nano-banana-2).

- **Pricing:** 1K and 2K $0.035, 4K $0.065 for Pro; 1K $0.025, 2K $0.034, 4K $0.058 for Nano Banana 2.