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Nano Banana

Create and edit images from a prompt and optional reference images.

Text to image
Image editing

Get API Key Documentation

Starting at

$0.015

per generation

62% cheaper than fal.ai

4 parameters · 1 price options

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Input

Prompt*

User's prompt

URLs

Reference image URLs for image generation or editing

Runs are charged to your balance.

Output

Output will appear here.

Pricing

Option	Price per generation	fal.ai	Your savings
Standard	$0.015	$0.039	−62%

Quick start

Full API reference →

1curl -X POST https://api.api-stock.com/api/v1/generation/create \
2  -H "Authorization: Bearer $API_STOCK_KEY" \
3  -H "Content-Type: application/json" \
4  -d '{
5    "model": "nano-banana",
6    "input": {
7      "prompt": "A cinematic shot of a city at dusk",
8      "size": "16:9",
9      "resolution": "1K"
10    }
11  }'

Parameters

Name	Type	Required	Default	Description
`prompt`	string	Yes	—	User's prompt
`urls`	string[]	No	—	Reference image URLs for image generation or editing
`size`	string	No	16:9	Output image size ratioOne of: 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9, 1:4, 1:8, 4:1, 8:1
`resolution`	string	No	1K	Output image resolutionOne of: 512px, 1K, 2K, 4K

Frequently asked questions

How much does Nano Banana cost?

Nano Banana starts at $0.015 per generation through the API Stock API. You pay per use from a single prepaid balance — there is no subscription — and the final price scales with parameters such as resolution or duration.

How do I call the Nano Banana API?

Send a POST request to https://api.api-stock.com/api/v1/generation/create with your API key and the model id "nano-banana". The call returns a task id you poll, or a webhook callback when the result is ready. A ready-to-run example is in the quick start above.

What input parameters does Nano Banana accept?

Nano Banana accepts 4 input parameters, including the required field(s) prompt. Their types, defaults and allowed values are listed in the parameters table above.

What happens if a Nano Banana request fails?

API Stock automatically retries the request on a reserve provider. If every provider fails, the charge is refunded to your balance.

Can I use Nano Banana with the same API key as other models?

Yes. Every model on API Stock — video, image, music and chat — shares one API key and one prepaid balance, so you can switch to Nano Banana without new credentials.

Other Image models

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