Google Nano Banana 2.1 API | Pricing & Docs

google/nano-banana-2.1/text-to-image

Nano Banana 2.1 turns a text prompt into a 1K, 2K, or 4K still, in frames from square to 8:1.

1. Get started

Use RunComfy's API to run google/nano-banana-2.1/text-to-image. 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/text-to-image \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "A square product photo of a matte ceramic pour-over kettle on a pale oak table, morning window light, soft shadow, no text"
  }'

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/text-to-image \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "A square product photo of a matte ceramic pour-over kettle on a pale oak table, morning window light, soft shadow, no text"
  }'

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"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "Describe the subject, setting, light, style, and any exact words that should appear in the image.",
      "type": "string",
      "default": "A square product photo of a matte ceramic pour-over kettle on a pale oak table, morning window light, soft shadow, no text"
    },
    "aspect_ratio": {
      "title": "Aspect Ratio (W:H)",
      "description": "Frame of the generated image. Auto lets the model choose.",
      "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/text-to-image. 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/text-to-image \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "A square product photo of a matte ceramic pour-over kettle on a pale oak table, morning window light, soft shadow, no text"
  }'

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/text-to-image \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "A square product photo of a matte ceramic pour-over kettle on a pale oak table, morning window light, soft shadow, no text"
  }'

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"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "Describe the subject, setting, light, style, and any exact words that should appear in the image.",
      "type": "string",
      "default": "A square product photo of a matte ceramic pour-over kettle on a pale oak table, morning window light, soft shadow, no text"
    },
    "aspect_ratio": {
      "title": "Aspect Ratio (W:H)",
      "description": "Frame of the generated image. Auto lets the model choose.",
      "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 turns a text prompt into a 1K, 2K, or 4K still, in frames from square to 8:1.

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 turns a text prompt into a 1K, 2K, or 4K still, in frames from square to 8:1.

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: Text-to-Image at 1K, 2K, and 4K on Models and API | RunComfy

Nano Banana 2.1 turns a text prompt into a 1K, 2K, or 4K still, in frames from square to 8:1.

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: Text-to-Image at 1K, 2K, and 4K on Models and API | RunComfy

Nano Banana 2.1 turns a text prompt into a 1K, 2K, or 4K still, in frames from square to 8:1.

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