Image model

nanobanano 2 4k

4K model for high-quality content, presentations, and full-size promotional materials.

API status: active via Grsai proxy

Generation cost

$0.040 / image

Request limit

100 QPS

Billing type

Per generation

Updated

2026-03-10

Billing information API documentation

Billing information

Generation cost: $0.040 / image
Billing unit: 1 image
Settlement model: Per generation
Minimum charge: From 1 image
Free tier: No free tier
Execution queue: Standard

API documentation

Endpoint: /api/v1/images/nanobanana/generate

Method: POST

Authorization: `Authorization: Bearer $APISTOR_API_KEY`

Response mode: stream by default or callback via `webHook`.

Result polling: /api/v1/images/nanobanana/result (POST with `id`).

Error types: /errors

Parameter	Type	Required	Description
model	string	Yes	Supported values: nanobanano-2, nanobanano-2-2k, nanobanano-2-4k.
prompt	string	Yes	Generation prompt.
urls	string[]	No	Reference image URLs or base64 strings.
aspectRatio	string	No	Aspect ratio: auto, 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 5:4, 4:5, 21:9.
webHook	string	No	Callback URL or '-1' for immediate task id return and follow-up polling.
shutProgress	boolean	No	Disable intermediate progress and return only final result.

Request example (cURL)

curl -X POST "https://api.apistor.io/api/v1/images/nanobanana/generate" \
  -H "Authorization: Bearer $APISTOR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "nanobanano-2-4k",
  "prompt": "High-quality ecommerce hero image of a futuristic banana product, soft studio light",
  "aspectRatio": "auto",
  "shutProgress": false
}'

Response example (JSON)

{
  "id": "f44bcf50-f2d0-4c26-a467-26f2014a771b",
  "model": "nano-banana-2",
  "progress": 100,
  "status": "succeeded",
  "results": [
    {
      "url": "https://example.com/generated-image.jpg",
      "content": "High-quality ecommerce hero image of a futuristic banana product, soft studio light"
    }
  ],
  "failure_reason": null
}

For polling: send webHook='-1' and use id with /api/v1/images/nanobanana/result.

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