Gemini-3.1-Flash Image Generation

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gemini-3.1-flash-image-preview",
    "prompt": "A cyberpunk city at night with flickering neon lights",
    "size": "16:9",
    "n": 1,
    "metadata": {
      "resolution": "2K"
    }
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gemini-3.1-flash-image-preview",
    "prompt": "Transform this photo into a watercolor painting style",
    "size": "1:1",
    "n": 1,
    "image_urls": ["https://example.com/photo.jpg"],
    "metadata": {
      "resolution": "2K"
    }
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gemini-3.1-flash-image-preview",
    "prompt": "Latest iPhone product promotional image",
    "size": "16:9",
    "n": 1,
    "metadata": {
      "resolution": "2K",
      "google_search": true,
      "google_image_search": true
    }
  }'

import requests

response = requests.post(
    "https://toapis.com/v1/images/generations",
    headers={
        "Authorization": "Bearer your-ToAPIs-key",
        "Content-Type": "application/json"
    },
    json={
        "model": "gemini-3.1-flash-image-preview",
        "prompt": "A cyberpunk city at night with flickering neon lights",
        "size": "16:9",
        "n": 1,
        "metadata": {
            "resolution": "2K"
        }
    }
)

task = response.json()
print(f"Task ID: {task['id']}")
print(f"Status: {task['status']}")

import requests

response = requests.post(
    "https://toapis.com/v1/images/generations",
    headers={
        "Authorization": "Bearer your-ToAPIs-key",
        "Content-Type": "application/json"
    },
    json={
        "model": "gemini-3.1-flash-image-preview",
        "prompt": "Transform this photo into a watercolor painting style",
        "size": "1:1",
        "n": 1,
        "image_urls": ["https://example.com/photo.jpg"],
        "metadata": {
            "resolution": "2K"
        }
    }
)

task = response.json()
print(f"Task ID: {task['id']}")
print(f"Status: {task['status']}")

const response = await fetch('https://toapis.com/v1/images/generations', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer your-ToAPIs-key',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model: 'gemini-3.1-flash-image-preview',
    prompt: 'A cyberpunk city at night with flickering neon lights',
    size: '16:9',
    n: 1,
    metadata: {
      resolution: '2K'
    }
  })
});

const task = await response.json();
console.log(`Task ID: ${task.id}`);
console.log(`Status: ${task.status}`);

const response = await fetch('https://toapis.com/v1/images/generations', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer your-ToAPIs-key',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model: 'gemini-3.1-flash-image-preview',
    prompt: 'Transform this photo into a watercolor painting style',
    size: '1:1',
    n: 1,
    image_urls: ['https://example.com/photo.jpg'],
    metadata: {
      resolution: '2K'
    }
  })
});

const task = await response.json();
console.log(`Task ID: ${task.id}`);
console.log(`Status: ${task.status}`);

{
  "id": "task_img_abc123def456",
  "object": "generation.task",
  "model": "gemini-3.1-flash-image-preview",
  "status": "queued",
  "progress": 0,
  "created_at": 1703884800,
  "metadata": {}
}

POST

images

generations

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gemini-3.1-flash-image-preview",
    "prompt": "A cyberpunk city at night with flickering neon lights",
    "size": "16:9",
    "n": 1,
    "metadata": {
      "resolution": "2K"
    }
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gemini-3.1-flash-image-preview",
    "prompt": "Transform this photo into a watercolor painting style",
    "size": "1:1",
    "n": 1,
    "image_urls": ["https://example.com/photo.jpg"],
    "metadata": {
      "resolution": "2K"
    }
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gemini-3.1-flash-image-preview",
    "prompt": "Latest iPhone product promotional image",
    "size": "16:9",
    "n": 1,
    "metadata": {
      "resolution": "2K",
      "google_search": true,
      "google_image_search": true
    }
  }'

import requests

response = requests.post(
    "https://toapis.com/v1/images/generations",
    headers={
        "Authorization": "Bearer your-ToAPIs-key",
        "Content-Type": "application/json"
    },
    json={
        "model": "gemini-3.1-flash-image-preview",
        "prompt": "A cyberpunk city at night with flickering neon lights",
        "size": "16:9",
        "n": 1,
        "metadata": {
            "resolution": "2K"
        }
    }
)

task = response.json()
print(f"Task ID: {task['id']}")
print(f"Status: {task['status']}")

import requests

response = requests.post(
    "https://toapis.com/v1/images/generations",
    headers={
        "Authorization": "Bearer your-ToAPIs-key",
        "Content-Type": "application/json"
    },
    json={
        "model": "gemini-3.1-flash-image-preview",
        "prompt": "Transform this photo into a watercolor painting style",
        "size": "1:1",
        "n": 1,
        "image_urls": ["https://example.com/photo.jpg"],
        "metadata": {
            "resolution": "2K"
        }
    }
)

task = response.json()
print(f"Task ID: {task['id']}")
print(f"Status: {task['status']}")

const response = await fetch('https://toapis.com/v1/images/generations', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer your-ToAPIs-key',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model: 'gemini-3.1-flash-image-preview',
    prompt: 'A cyberpunk city at night with flickering neon lights',
    size: '16:9',
    n: 1,
    metadata: {
      resolution: '2K'
    }
  })
});

const task = await response.json();
console.log(`Task ID: ${task.id}`);
console.log(`Status: ${task.status}`);

const response = await fetch('https://toapis.com/v1/images/generations', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer your-ToAPIs-key',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model: 'gemini-3.1-flash-image-preview',
    prompt: 'Transform this photo into a watercolor painting style',
    size: '1:1',
    n: 1,
    image_urls: ['https://example.com/photo.jpg'],
    metadata: {
      resolution: '2K'
    }
  })
});

const task = await response.json();
console.log(`Task ID: ${task.id}`);
console.log(`Status: ${task.status}`);

{
  "id": "task_img_abc123def456",
  "object": "generation.task",
  "model": "gemini-3.1-flash-image-preview",
  "status": "queued",
  "progress": 0,
  "created_at": 1703884800,
  "metadata": {}
}

Google Gemini 3.1 Flash image generation model (Nano banana2)
Use model parameter to select gemini-3.1-flash-image-preview model
Supports text-to-image and image-to-image, up to 4K resolution output
Up to 14 reference images to maintain style/character consistency
Supports extreme aspect ratios (1:4, 4:1, 1:8, 8:1)
Integrated Google Search enhancement for more accurate real-world images
Async task management, query results by task ID

Important Change: For better performance and cost control, we no longer support passing base64 image data directly in image_urls. Please use the Upload Image API first to upload images and get URLs, then call this endpoint.

Authorizations

string

required

All endpoints require Bearer Token authenticationGet your API Key from the API Key Management PageAdd to request header:

Authorization: Bearer YOUR_API_KEY

Body

string

default:"gemini-3.1-flash-image-preview"

required

Image generation model nameExample: "gemini-3.1-flash-image-preview"

string

required

Text description for image generation

string

Image aspect ratioSupported ratios:

Value	Use Case
`1:1`	Square, avatar, social media
`3:2` / `2:3`	Standard photo
`4:3` / `3:4`	Traditional display ratio
`16:9` / `9:16`	Widescreen / vertical video cover
`5:4` / `4:5`	Instagram images
`21:9`	Ultra-wide banner
`1:4` / `4:1`	Long poster / banner
`1:8` / `8:1`	Extreme long image / ad banner

integer

default:1

Number of images to generate⚠️ Note: Must be a pure number (e.g. 1), do not add quotes, otherwise it will error

object[]

List of reference image URLs for image-to-image or image editing

Show Detailed field description

string

required

Image URL address⚠️ URL format only (base64 no longer supported)

Publicly accessible image URL (http:// or https://)
Example: https://example.com/image.jpg
You can use the Upload Image API to upload local images and get URLs

Limitations:

Single image must not exceed 10MB
Supported formats: .jpeg, .jpg, .png, .webp

Limit: Maximum 14 images (recommended: up to 10 object references + 4 character references)

object

Metadata parameters for passing additional configuration options

Show Supported metadata fields

string

default:"1K"

Output image resolutionSupported values:

0.5K - ~512px, low-resolution preview
1K - ~1024px, standard resolution (default)
2K - ~2048px, high resolution
4K - ~4096px, ultra-high resolution

Note: Pricing varies by resolution; 4K costs more than 1K

boolean

default:"false"

Enable Google text search enhancement

true: The model will first search the web for text information to assist in image generation, suitable for scenarios requiring real-world accuracy
false: Disabled (default)

boolean

default:"false"

Enable Google image search enhancement

true: In addition to text search, also searches for reference images to assist generation, suitable for scenarios requiring visual references
false: Disabled (default)

Note: Must be used together with google_search: true

Response

string

Unique task identifier for status queries

string

Object type, always generation.task

string

Model name used

string

Task status

queued - Queued for processing
in_progress - Processing
completed - Successfully completed
failed - Failed

integer

Task progress percentage (0-100)

integer

Task creation timestamp (Unix timestamp)

object

Task metadata

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gemini-3.1-flash-image-preview",
    "prompt": "A cyberpunk city at night with flickering neon lights",
    "size": "16:9",
    "n": 1,
    "metadata": {
      "resolution": "2K"
    }
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gemini-3.1-flash-image-preview",
    "prompt": "Transform this photo into a watercolor painting style",
    "size": "1:1",
    "n": 1,
    "image_urls": ["https://example.com/photo.jpg"],
    "metadata": {
      "resolution": "2K"
    }
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gemini-3.1-flash-image-preview",
    "prompt": "Latest iPhone product promotional image",
    "size": "16:9",
    "n": 1,
    "metadata": {
      "resolution": "2K",
      "google_search": true,
      "google_image_search": true
    }
  }'

import requests

response = requests.post(
    "https://toapis.com/v1/images/generations",
    headers={
        "Authorization": "Bearer your-ToAPIs-key",
        "Content-Type": "application/json"
    },
    json={
        "model": "gemini-3.1-flash-image-preview",
        "prompt": "A cyberpunk city at night with flickering neon lights",
        "size": "16:9",
        "n": 1,
        "metadata": {
            "resolution": "2K"
        }
    }
)

task = response.json()
print(f"Task ID: {task['id']}")
print(f"Status: {task['status']}")

import requests

response = requests.post(
    "https://toapis.com/v1/images/generations",
    headers={
        "Authorization": "Bearer your-ToAPIs-key",
        "Content-Type": "application/json"
    },
    json={
        "model": "gemini-3.1-flash-image-preview",
        "prompt": "Transform this photo into a watercolor painting style",
        "size": "1:1",
        "n": 1,
        "image_urls": ["https://example.com/photo.jpg"],
        "metadata": {
            "resolution": "2K"
        }
    }
)

task = response.json()
print(f"Task ID: {task['id']}")
print(f"Status: {task['status']}")

const response = await fetch('https://toapis.com/v1/images/generations', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer your-ToAPIs-key',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model: 'gemini-3.1-flash-image-preview',
    prompt: 'A cyberpunk city at night with flickering neon lights',
    size: '16:9',
    n: 1,
    metadata: {
      resolution: '2K'
    }
  })
});

const task = await response.json();
console.log(`Task ID: ${task.id}`);
console.log(`Status: ${task.status}`);

const response = await fetch('https://toapis.com/v1/images/generations', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer your-ToAPIs-key',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model: 'gemini-3.1-flash-image-preview',
    prompt: 'Transform this photo into a watercolor painting style',
    size: '1:1',
    n: 1,
    image_urls: ['https://example.com/photo.jpg'],
    metadata: {
      resolution: '2K'
    }
  })
});

const task = await response.json();
console.log(`Task ID: ${task.id}`);
console.log(`Status: ${task.status}`);

{
  "id": "task_img_abc123def456",
  "object": "generation.task",
  "model": "gemini-3.1-flash-image-preview",
  "status": "queued",
  "progress": 0,
  "created_at": 1703884800,
  "metadata": {}
}

Gemini-3-Pro-Image Gemini-2.5-Flash-Image

Overview

Quick Start

Chat API

Image API

Video API

Task Management

File Uploads

Account

FAQs

Authorizations

Body

Response

​Authorizations

​Body

​Response

Authorizations

Body

Response