> ## Documentation Index
> Fetch the complete documentation index at: https://docs.crun.ai/llms.txt
> Use this file to discover all available pages before exploring further.
# Nano Banana 2 Lite
> Nano Banana 2 Lite is Google’s fastest, most cost-efficient Gemini Image model in the Nano Banana family, designed for low-latency 1K image generation, prompt-based editing, and scalable creative production.
## Model Notes
Use `google/nano-banana-2-lite` for fast text-to-image and image-to-image workflows.
Provide `img_urls` when you want to transform input images or use visual references; omit it for pure text-to-image generation.
## Query Task Status
After submitting a task, use the unified query endpoint to check progress and retrieve results:
Learn how to query task status and retrieve generation results
For production use, we recommend using the `callback_url` parameter to receive automatic notifications when generation completes, rather than polling the status endpoint.
## Related Resources
Explore all available models
Check credits and account usage
## OpenAPI
````yaml models/google/nano-banana-2-lite.json post /api/v1/client/job/CreateTask
openapi: 3.0.0
info:
title: Google Nano Banana 2 Lite API
description: crun.ai Nano Banana 2 Lite API Documentation
version: 1.0.0
contact:
name: Technical Support
email: support@crun.ai
servers:
- url: https://api.crun.ai
description: API Server
security:
- ApiKeyAuth: []
paths:
/api/v1/client/job/CreateTask:
post:
summary: Generate images using Google Nano Banana 2 Lite
operationId: google/nano-banana-2-lite
requestBody:
required: true
content:
application/json:
schema:
type: object
required:
- model
- input
properties:
model:
type: string
enum:
- google/nano-banana-2-lite
description: |-
The model name to use for generation. Required field.
- Supports `google/nano-banana-2-lite`
callback_url:
type: string
format: uri
description: >-
Optional. Callback URL for receiving task completion
notifications.
- System will POST task status and results to this URL when
generation completes
- Callback payloads structure is consistent with the `data`
object returned by the task status query
- Your callback endpoint should accept POST requests with
JSON payload containing results
- It returns an HTTP 200 status code upon successful receipt
example: https://your-domain.com/api/callback
input:
type: object
description: >-
Input parameters for the Google Nano Banana 2 Lite
text-to-image or image-to-image generation task.
properties:
prompt:
type: string
description: >-
Text prompt describing the image to generate or edit.
Supports up to 20,000 characters.
minLength: 1
maxLength: 20000
example: >-
A clean product photo of a compact espresso machine on a
marble counter, morning light, realistic commercial
photography.
aspect_ratio:
type: string
description: >-
Aspect ratio of the generated image. Use `auto` to match
the input image when applicable.
enum:
- '1:1'
- '2:3'
- '3:2'
- '3:4'
- '4:3'
- '4:5'
- '5:4'
- '9:16'
- '16:9'
- '1:4'
- '4:1'
- '1:8'
- '8:1'
- '21:9'
- auto
default: '1:1'
example: '16:9'
img_urls:
type: array
description: >-
Optional input image URLs for image-to-image generation,
editing, or visual references. Supports up to 10 images.
items:
type: string
format: uri
maxItems: 10
example:
- https://example.com/product.jpg
- https://example.com/style-reference.png
required:
- prompt
example:
model: google/nano-banana-2-lite
callback_url: https://your-domain.com/api/callback
input:
prompt: >-
Turn the product into a bright studio hero image with soft
shadows and a clean white background.
aspect_ratio: '16:9'
img_urls:
- https://example.com/product.jpg
responses:
'200':
description: Request successful
content:
application/json:
schema:
allOf:
- $ref: '#/components/schemas/ApiResponse'
- type: object
properties:
data:
type: object
properties:
task_id:
type: string
description: >-
Task ID, can be used with Get Task Details
endpoint to query task status
example: task_nano-banana-2-lite_12345678
example:
code: 200
message: success
data:
task_id: task_nano-banana-2-lite_12345678
'422':
description: Validation Error
content:
application/json:
schema:
allOf:
- $ref: '#/components/schemas/ApiResponse'
- type: object
properties:
errors:
type: array
description: Detailed validation error messages
items:
type: string
example:
- >-
Value error, Invalid input for model
google/nano-banana-2-lite: aspect_ratio: Input
should be one of the supported aspect ratios
example:
code: 422
message: Missing Params or Type Error
errors:
- >-
Value error, Invalid input for model
google/nano-banana-2-lite: aspect_ratio: Input should be one
of the supported aspect ratios
'500':
$ref: '#/components/responses/Error'
components:
schemas:
ApiResponse:
type: object
properties:
code:
type: integer
enum:
- 200
- 401
- 402
- 404
- 422
- 429
- 455
- 500
- 501
- 505
description: >-
Response status code
- **200**: Success - Request has been processed successfully
- **401**: Unauthorized - Authentication credentials are missing or
invalid
- **402**: Insufficient Credits - Account does not have enough
credits to perform the operation
- **404**: Not Found - The requested resource or endpoint does not
exist
- **422**: Validation Error - The request parameters failed
validation checks
- **429**: Rate Limited - Request limit has been exceeded for this
resource
- **455**: Service Unavailable - System is currently undergoing
maintenance
- **500**: Server Error - An unexpected error occurred while
processing the request
- **501**: Generation Failed - Content generation task failed
- **505**: Feature Disabled - The requested feature is currently
disabled
message:
type: string
description: Response message, error description when failed
example: success
responses:
Error:
description: Server Error
securitySchemes:
ApiKeyAuth:
type: apiKey
in: header
name: x-api-key
description: >-
All APIs require authentication via API Key.
Get API Key:
1. Visit [API Key Management Page](https://crun.ai/user-api-key) to get
your API Key
Usage:
Add to request header:
x-api-key: YOUR_API_KEY
Note:
- Keep your API Key secure and do not share it with others
- If you suspect your API Key has been compromised, reset it immediately
in the management page
````