Google Nano Banana 2.1 Edit API | Pricing & Docs

google/nano-banana-2.1/edit

Nano Banana 2.1 Edit applies a text instruction to as many as 10 reference images and returns a 1K, 2K, or 4K still.

1. Get started

Use RunComfy's API to run google/nano-banana-2.1/edit. For accepted inputs and outputs, see the model's schema.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/google/nano-banana-2.1/edit \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "Replace the background with a rainy pedestrian alley at night with neon signs and wet pavement. Keep the person's face, clothing, and pose unchanged.",
    "image_urls": [
      "https://playgrounds-storage-public.runcomfy.net/tools/7465/media-files/input-1-1.png"
    ]
  }'

2. Authentication

Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.

3. API reference

Submit a request

Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/google/nano-banana-2.1/edit \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "Replace the background with a rainy pedestrian alley at night with neon signs and wet pavement. Keep the person's face, clothing, and pose unchanged.",
    "image_urls": [
      "https://playgrounds-storage-public.runcomfy.net/tools/7465/media-files/input-1-1.png"
    ]
  }'

Monitor request status

Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
  --header "Authorization: Bearer <token>"

Retrieve request results

Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
  --header "Authorization: Bearer <token>"

Cancel a request

Cancel a queued job by request_id; in-progress jobs cannot be cancelled.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
  --header "Authorization: Bearer <token>"

4. File inputs

Hosted file (URL)

Provide a publicly reachable HTTPS URL. Ensure the host allows server-side fetches (no login/cookies required) and isn't rate-limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre-signed URLs for private assets.

5. Schema

Input schema

{
  "type": "object",
  "title": "Input schema",
  "required": [
    "prompt",
    "image_urls"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "Say what should change, then what must stay the same. Refer to extra images by order, such as the jacket from image 2.",
      "type": "string",
      "default": "Replace the background with a rainy pedestrian alley at night with neon signs and wet pavement. Keep the person's face, clothing, and pose unchanged."
    },
    "image_urls": {
      "title": "Images",
      "description": "Reference images for the edit. 1 to 10. JPEG, PNG, or WebP. Each image adds $0.0008.",
      "type": "array",
      "items": {
        "type": "string",
        "format": "image_uri"
      },
      "minItems": 1,
      "maxItems": 10,
      "default": [
        "https://playgrounds-storage-public.runcomfy.net/tools/7465/media-files/input-1-1.png"
      ]
    },
    "aspect_ratio": {
      "title": "Aspect Ratio (W:H)",
      "description": "Frame of the edited image. Auto follows the input.",
      "type": "string",
      "enum": [
        "auto",
        "21:9",
        "16:9",
        "3:2",
        "4:3",
        "5:4",
        "1:1",
        "4:5",
        "3:4",
        "2:3",
        "9:16",
        "1:4",
        "4:1",
        "1:8",
        "8:1"
      ],
      "default": "auto"
    },
    "resolution": {
      "title": "Resolution",
      "description": "Output size. 1K is the draft size. 2K and 4K cost more.",
      "type": "string",
      "enum": [
        "1K",
        "2K",
        "4K"
      ],
      "default": "1K"
    }
  }
}

Output schema

{
  "output": {
    "type": "object",
    "properties": {
      "image": {
        "type": "string",
        "format": "uri",
        "description": "single image URL"
      },
      "video": {
        "type": "string",
        "format": "uri",
        "description": "single video URL"
      },
      "images": {
        "type": "array",
        "description": "multiple image URLs",
        "items": {
          "type": "string",
          "format": "uri"
        }
      },
      "videos": {
        "type": "array",
        "description": "multiple video URLs",
        "items": {
          "type": "string",
          "format": "uri"
        }
      }
    }
  }
}

RunComfy

RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.

1. Get started

Use RunComfy's API to run google/nano-banana-2.1/edit. For accepted inputs and outputs, see the model's schema.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/google/nano-banana-2.1/edit \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "Replace the background with a rainy pedestrian alley at night with neon signs and wet pavement. Keep the person's face, clothing, and pose unchanged.",
    "image_urls": [
      "https://playgrounds-storage-public.runcomfy.net/tools/7465/media-files/input-1-1.png"
    ]
  }'

3. API reference

Submit a request

Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/google/nano-banana-2.1/edit \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "Replace the background with a rainy pedestrian alley at night with neon signs and wet pavement. Keep the person's face, clothing, and pose unchanged.",
    "image_urls": [
      "https://playgrounds-storage-public.runcomfy.net/tools/7465/media-files/input-1-1.png"
    ]
  }'

Monitor request status

Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
  --header "Authorization: Bearer <token>"

Retrieve request results

Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
  --header "Authorization: Bearer <token>"

Cancel a request

Cancel a queued job by request_id; in-progress jobs cannot be cancelled.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
  --header "Authorization: Bearer <token>"

4. File inputs

Hosted file (URL)

5. Schema

Input schema

{
  "type": "object",
  "title": "Input schema",
  "required": [
    "prompt",
    "image_urls"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "Say what should change, then what must stay the same. Refer to extra images by order, such as the jacket from image 2.",
      "type": "string",
      "default": "Replace the background with a rainy pedestrian alley at night with neon signs and wet pavement. Keep the person's face, clothing, and pose unchanged."
    },
    "image_urls": {
      "title": "Images",
      "description": "Reference images for the edit. 1 to 10. JPEG, PNG, or WebP. Each image adds $0.0008.",
      "type": "array",
      "items": {
        "type": "string",
        "format": "image_uri"
      },
      "minItems": 1,
      "maxItems": 10,
      "default": [
        "https://playgrounds-storage-public.runcomfy.net/tools/7465/media-files/input-1-1.png"
      ]
    },
    "aspect_ratio": {
      "title": "Aspect Ratio (W:H)",
      "description": "Frame of the edited image. Auto follows the input.",
      "type": "string",
      "enum": [
        "auto",
        "21:9",
        "16:9",
        "3:2",
        "4:3",
        "5:4",
        "1:1",
        "4:5",
        "3:4",
        "2:3",
        "9:16",
        "1:4",
        "4:1",
        "1:8",
        "8:1"
      ],
      "default": "auto"
    },
    "resolution": {
      "title": "Resolution",
      "description": "Output size. 1K is the draft size. 2K and 4K cost more.",
      "type": "string",
      "enum": [
        "1K",
        "2K",
        "4K"
      ],
      "default": "1K"
    }
  }
}

Output schema

{
  "output": {
    "type": "object",
    "properties": {
      "image": {
        "type": "string",
        "format": "uri",
        "description": "single image URL"
      },
      "video": {
        "type": "string",
        "format": "uri",
        "description": "single video URL"
      },
      "images": {
        "type": "array",
        "description": "multiple image URLs",
        "items": {
          "type": "string",
          "format": "uri"
        }
      },
      "videos": {
        "type": "array",
        "description": "multiple video URLs",
        "items": {
          "type": "string",
          "format": "uri"
        }
      }
    }
  }
}

Nano Banana 2.1 Edit applies a text instruction to as many as 10 reference images and returns a 1K, 2K, or 4K still.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

Nano Banana 2.1 Edit applies a text instruction to as many as 10 reference images and returns a 1K, 2K, or 4K still.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

Nano Banana 2.1 Edit: Prompt Editing with up to 10 References on Models and API | RunComfy

Nano Banana 2.1 Edit applies a text instruction to as many as 10 reference images and returns a 1K, 2K, or 4K still.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

Nano Banana 2.1 Edit: Prompt Editing with up to 10 References on Models and API | RunComfy

Nano Banana 2.1 Edit applies a text instruction to as many as 10 reference images and returns a 1K, 2K, or 4K still.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema