> ## Documentation Index
> Fetch the complete documentation index at: https://docs.runflow.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Nano Banana 2

> Nano Banana 2 is Google's new state-of-the-art fast image generation and editing model

<Info>
  Pricing: **\$0.08/image**. Endpoint: `POST /v1/models/google/nano-banana-2/runs`.
</Info>

Nano Banana 2 is Google's new state-of-the-art fast image generation and editing model

## Overview

* **Endpoint**: [https://api.runflow.io/v1/models/google/nano-banana-2/runs](https://api.runflow.io/v1/models/google/nano-banana-2/runs)
* **Model ID**: google/nano-banana-2
* **Provider**: Google
* **License**: commercial
* **Last Updated**: 2026-04-13

## Pricing

* **Base price**: \$0.08/image
* **Note**: Per image (1K default)

# Nano Banana 2 API

**Endpoint:** `POST /v1/models/google/nano-banana-2/runs`

## Run the model

### Python

```python theme={"dark"}
import requests

response = requests.post(
    "https://api.runflow.io/v1/models/google/nano-banana-2/runs",
    headers={"Authorization": "Bearer RUNFLOW_API_KEY"},
    json={
        "input": {
            "prompt": "A bioluminescent treehouse hotel suspended between ancient redwood trees at twilight. Three geodesic glass pods connected by vine-wrapped rope bridges, each pod glowing turquoise from within. Orchids and phosphorescent mushrooms grow on the bark. A narrow wooden staircase spirals up the trunk. Mist drifts through the canopy."
        },
        "callback_url": "https://your-server.com/webhook"
    },
)

data = response.json()
print(data)
```

### Node.js

```javascript theme={"dark"}
const response = await fetch(
  "https://api.runflow.io/v1/models/google/nano-banana-2/runs",
  {
    method: "POST",
    headers: {
      "Authorization": "Bearer RUNFLOW_API_KEY",
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
        "input": {
            "prompt": "A bioluminescent treehouse hotel suspended between ancient redwood trees at twilight. Three geodesic glass pods connected by vine-wrapped rope bridges, each pod glowing turquoise from within. Orchids and phosphorescent mushrooms grow on the bark. A narrow wooden staircase spirals up the trunk. Mist drifts through the canopy."
        },
        "callback_url": "https://your-server.com/webhook"
    }),
  }
);

const data = await response.json();
console.log(data);
```

### cURL

```bash theme={"dark"}
curl -X POST https://api.runflow.io/v1/models/google/nano-banana-2/runs \
  -H "Authorization: Bearer $RUNFLOW_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'JSON'
{
    "input": {
        "prompt": "A bioluminescent treehouse hotel suspended between ancient redwood trees at twilight. Three geodesic glass pods connected by vine-wrapped rope bridges, each pod glowing turquoise from within. Orchids and phosphorescent mushrooms grow on the bark. A narrow wooden staircase spirals up the trunk. Mist drifts through the canopy."
    },
    "callback_url": "https://your-server.com/webhook"
}
JSON
```

## Request parameters

| Parameter      | Type           | Required | Description                                                 |
| -------------- | -------------- | -------- | ----------------------------------------------------------- |
| `input`        | object         | required | Model input parameters. See "Input schema" below.           |
| `callback_url` | string \| null | optional | Webhook URL - POSTed when the run reaches a terminal state. |
| `metadata`     | object \| null | optional | Arbitrary key-value pairs attached to the run.              |

## Input schema

| Field               | Type    | Required | Allowed values                                                                                              | Description                                                                                                                                                                            |
| ------------------- | ------- | -------- | ----------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `prompt`            | string  | required | Any                                                                                                         | Text prompt describing the image. 3–50,000 characters.                                                                                                                                 |
| `resolution`        | string  | optional | `0.5K`, `1K`, `2K`, `4K`                                                                                    | Output resolution. Options: "0.5K", "1K", "2K", "4K". Default: "1K". Price varies by tier.                                                                                             |
| `aspect_ratio`      | string  | optional | `auto`, `21:9`, `16:9`, `3:2`, `4:3`, `5:4`, `1:1`, `4:5`, `3:4`, `2:3`, `9:16`, `4:1`, `1:4`, `8:1`, `1:8` | Image aspect ratio. Options: "21:9", "16:9", "3:2", "4:3", "5:4", "1:1", "4:5", "3:4", "2:3", "9:16", "4:1", "1:4", "8:1", "1:8". Use "auto" to let the model decide. Default: "auto". |
| `enable_web_search` | boolean | optional | Any                                                                                                         | Enable web search to ground generation in current information. +\$0.015/image. Default: false.                                                                                         |
| `thinking_level`    | string  | optional | `minimal`, `high`                                                                                           | Enable model thinking. Options: "minimal", "high". Adds +\$0.002/image at high level. Omit to disable.                                                                                 |
| `num_images`        | integer | optional | Any                                                                                                         | Number of images to generate. Range: 1–4. Default: 1.                                                                                                                                  |
| `output_format`     | string  | optional | `jpeg`, `png`, `webp`                                                                                       | Output format. Options: "jpeg", "png", "webp". Default: "png".                                                                                                                         |
| `safety_tolerance`  | string  | optional | Any                                                                                                         | Content moderation level. 1 = most strict, 6 = least strict. Default: 4.                                                                                                               |
| `seed`              | integer | optional | Any                                                                                                         | Random seed for reproducible outputs.                                                                                                                                                  |
| `limit_generations` | boolean | optional | Any                                                                                                         | Limit to 1 image per prompt round regardless of prompt instructions. Default: true.                                                                                                    |
| `sync_mode`         | boolean | optional | Any                                                                                                         | Return media as data URI without storing in history. Default: false.                                                                                                                   |

## Output schema

| Field           | Type | Description                                                                                         |
| --------------- | ---- | --------------------------------------------------------------------------------------------------- |
| `outputs`       | json | Unified output array - one entry per generated artifact with url/type/width/height/duration/etc.    |
| `model_data`    | json | Model-specific extra fields (prompt, description, actual\_prompt, masks, etc.) keyed by field name. |
| `nsfw_detected` | json | true if the provider flagged output as NSFW, false if cleared, null if not checked.                 |
| `seed`          | json | Deterministic seed used for generation, or null if the provider doesn't return one.                 |
| `timing`        | json | Provider timing info (inference\_ms etc.), or null.                                                 |

## Callback payload

When you provide a `callback_url`, Runflow POSTs to it once the run reaches a terminal state.

| Field          | Type           | Description                                                    |
| -------------- | -------------- | -------------------------------------------------------------- |
| `event`        | string         | Event type: "run.completed", "run.failed", or "run.cancelled". |
| `run_id`       | string         | The unique identifier of the run.                              |
| `status`       | string         | Terminal status: "succeeded", "failed", or "cancelled".        |
| `output`       | object \| null | The run output. Null if the run failed or was cancelled.       |
| `duration_ms`  | number \| null | Total run duration in milliseconds.                            |
| `created_at`   | string \| null | ISO 8601 timestamp when the run was created.                   |
| `completed_at` | string \| null | ISO 8601 timestamp when the run reached terminal state.        |
| `metadata`     | object \| null | The metadata object passed at run creation, if any.            |

* **Retries:** 3 attempts with exponential backoff (1s, 2s). Retries on 5xx / network errors only.
* **Headers:** `Runflow-Request-Id` is always sent. `Runflow-Signature` is sent if a signing secret is configured.

## Additional Resources

* [Playground](https://app.runflow.io/models/google/nano-banana-2)
* [API Reference](https://app.runflow.io/models/google/nano-banana-2?tab=api)
* [Documentation](https://docs.runflow.io)
* [OpenAPI](https://docs.runflow.io/api/openapi.public.json)

## Related

<CardGroup cols={2}>
  <Card title="Browse all models" icon="grid" href="/models">Browse the catalog.</Card>
  <Card title="Run lifecycle" icon="play" href="/concepts/runs">Callbacks, polling, statuses.</Card>
  <Card title="Callbacks" icon="webhook" href="/concepts/callbacks">Handle async results.</Card>
  <Card title="Pricing" icon="coin" href="/concepts/pricing">How requests bill out.</Card>
</CardGroup>