Nano Banana 2 Lite

Nano Banana 2 Lite is a lightweight image generation and editing model served through the Kie jobs API. It currently supports 1K output only.

Model

Model Name	Output	Aspect Ratios
`nano-banana-2-lite`	Image	1:1, 1:4, 1:8, 2:3, 3:2, 3:4, 4:1, 4:3, 4:5, 5:4, 8:1, 9:16, 16:9, 21:9, auto

Pricing

Resolution	Credits	Price
1K	10 credits	$0.05

Create Task

curl -X POST https://api.aivideoapi.ai/v1/images/generations \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "nano-banana-2-lite",
    "callback_url": "https://your-server.com/webhook",
    "input": {
      "prompt": "A polished comic-style launch scene in a bright creative workspace",
      "aspect_ratio": "16:9"
    }
  }'

Request Body

Field	Type	Required	Description
`model`	string	Yes	Must be `nano-banana-2-lite`
`input`	object	Yes	Generation parameters, see below
`callback_url`	string	No	URL to receive task completion/failure notifications

Input Object

Field	Type	Required	Description
`prompt`	string	Yes	Text description of the desired image, max 20,000 characters
`aspect_ratio`	string	No	Aspect ratio, default `auto`
`image_urls`	string[]	No	Up to 10 image URLs for reference or editing (JPEG, PNG, WebP)
`resolution`	string	No	`1K` only; defaults to `1K`

output_format, 2K, and 4K are not supported by Nano Banana 2 Lite.

Example: Image Editing

curl -X POST https://api.aivideoapi.ai/v1/images/generations \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "nano-banana-2-lite",
    "input": {
      "prompt": "Transform this product photo into a clean studio advertisement",
      "image_urls": [
        "https://example.com/product.png"
      ],
      "aspect_ratio": "4:5"
    }
  }'

Response

{
  "code": 200,
  "msg": "success",
  "data": {
    "taskId": "397ce9f2-c04e-4244-ac33-3af19a7cc297"
  }
}

Query Task

curl https://api.aivideoapi.ai/v1/tasks/{taskId} \
  -H "Authorization: Bearer sk-your-api-key"

Status transitions: pending -> processing -> completed or failed.

Completed

{
  "id": "397ce9f2-c04e-4244-ac33-3af19a7cc297",
  "status": "completed",
  "model": "nano-banana-2-lite",
  "output": {
    "urls": [
      "https://file.aivideoapi.ai/images/2026/07/02/abc123.jpg"
    ],
    "metadata": {
      "model": "nano-banana-2-lite",
      "costTime": 12000
    }
  }
}

Callback

Pass callback_url when creating the task. The system sends a POST request when the task completes or fails. The callback format matches the query task response.

Error Codes

When a request fails, the API returns a JSON error response:

{
  "error": {
    "code": "insufficient_credits",
    "message": "Your credit balance is too low. Please top up.",
    "type": "billing_error"
  }
}

Error Reference

HTTP Status	Code	Type	Description
400	`invalid_request`	invalid_request_error	Missing or invalid parameters
401	`invalid_api_key`	authentication_error	API key is invalid, disabled, or deleted
402	`insufficient_credits`	billing_error	Credit balance too low, please top up
403	`ip_not_allowed`	permission_error	Request IP not in the key's allowlist
404	`model_not_found`	invalid_request_error	Model does not exist or is inactive
404	`task_not_found`	invalid_request_error	Task ID does not exist
429	`rate_limit_exceeded`	rate_limit_error	Too many requests, please slow down
429	`spend_limit_exceeded`	billing_error	Key spend limit reached (hourly/daily/total)
500	`internal_error`	api_error	Unexpected server error
503	`upstream_error`	upstream_error	Upstream AI provider returned an error

Common Scenarios

invalid_request (400)

Returned when required fields are missing or invalid.

{
  "error": {
    "code": "invalid_request",
    "message": "'model' is required.",
    "type": "invalid_request_error"
  }
}

insufficient_credits (402)

Your balance is too low. Check your balance with GET /v1/credits and top up in Dashboard > Billing.

invalid_api_key (401)

Possible causes:

The key does not start with sk-
The key has been disabled or deleted
The user account has been banned

upstream_error (503)

The upstream AI provider returned an error. This may happen when:

The input contains sensitive or prohibited content
The provider is temporarily unavailable
The request parameters are not supported by the provider

Credits are automatically refunded when a task fails due to upstream errors.