# Nano Banana Pro Edit (`nano_banana_pro/edit`)

> Google Gemini 3 Pro Image editing. Reference-based generation.

- Capability: Images (tool `image`) — Image to image
- Price: from $0.15 per run (1 credit = $0.01). Exact price for a request: POST https://api.varg.ai/v2/estimate
- Typical time: ~15 s
- JSON Schema: https://api.varg.ai/v2/tools/image?model=nano_banana_pro%2Fedit (public, no key)
- Try it: https://varg.ai/dashboard/tools/playground?model=nano_banana_pro%2Fedit

## Call it

REST: `POST https://api.varg.ai/v2/tools/image/call` with `Authorization: Bearer $VARG_API_KEY` (create a key at https://varg.ai/dashboard/api).
It answers `202` with a job right away. Poll `GET /v2/jobs/{id}` until `status` is `completed`, then read `output.outputs[0].url` — or pass `options.webhook_url` and get the finished job POSTed to you.

```bash
curl -X POST https://api.varg.ai/v2/tools/image/call \
  -H "Authorization: Bearer $VARG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "nano_banana_pro/edit",
  "prompt": "same woman in a different outfit, summer dress, outdoor cafe",
  "files": [
    {
      "url": "https://uu.varg.ai/1782396802265_6ehcpufl.PNG"
    },
    {
      "url": "https://uu.varg.ai/1782292075799_npn03uf2.png"
    }
  ],
  "aspect_ratio": "9:16"
}'
```

MCP: the varg server `https://mcp.varg.ai/mcp` (OAuth sign-in, no key) runs it with `call_tool`:

```json
{
  "tool": "image",
  "input": {
    "model": "nano_banana_pro/edit",
    "prompt": "same woman in a different outfit, summer dress, outdoor cafe",
    "files": [
      {
        "url": "https://uu.varg.ai/1782396802265_6ehcpufl.PNG"
      },
      {
        "url": "https://uu.varg.ai/1782292075799_npn03uf2.png"
      }
    ],
    "aspect_ratio": "9:16"
  },
  "wait": true
}
```

## Inputs

| field | type | required | default | allowed | description |
|---|---|---|---|---|---|
| `model` | string | yes | — | `nano_banana_pro/edit` or a route key below | Which model runs the job. |
| `prompt` | string | no | — | — | — |
| `files` | array of { url } | no | — | — | — |
| `aspect_ratio` | string | no | — | e.g. 16:9 \| 9:16 \| 1:1 \| 4:3 \| 3:4 \| 21:9 \| auto | — |

Media inputs are URLs. Upload a local file first with `POST /v2/files` and pass the returned URL.

## Provider options

Optional, per provider, under `provider_options.<provider>`. Only the options of the provider that runs the job apply — pin a route to choose it.

### provider_options.fal

| field | type | required | default | allowed | description |
|---|---|---|---|---|---|
| `prompt` | string | no | — | — | The prompt for image editing. |
| `system_prompt` | string | no | — | — | Optional system instruction that steers the model's persona and output style across the request. Leave blank to omit; when provided, it is sent as the system instruction to Gemini (or as a system message on OpenAI-compatible providers). |
| `image_urls` | array of URL strings | no | — | — | — |
| `seed` | integer | no | — | -9007199254740991–9007199254740991 | — |
| `sync_mode` | boolean | no | — | — | If `True`, the media will be returned as a data URI and the output data won't be available in the request history. |
| `num_images` | integer | no | — | 1–4 | The number of images to generate. |
| `resolution` | string | no | — | 1K \| 2K \| 4K | — |
| `aspect_ratio` | string | no | — | auto \| 21:9 \| 16:9 \| 3:2 \| 4:3 \| 5:4 \| 1:1 \| 4:5 \| 3:4 \| 2:3 \| 9:16 | — |
| `output_format` | string | no | — | jpeg \| png \| webp | — |
| `safety_tolerance` | string | no | — | 1 \| 2 \| 3 \| 4 \| 5 \| 6 | — |
| `enable_web_search` | boolean | no | — | — | Enable web search for the image generation task. This will allow the model to use the latest information from the web to generate the image. |
| `limit_generations` | boolean | no | — | — | Experimental parameter to limit the number of generations from each round of prompting to 1. Set to `True` to to disregard any instructions in the prompt regarding the number of images to generate. |

## Routes

`"model": "nano_banana_pro/edit"` picks a route automatically (priority order, then the inputs you send). To pin one, pass its key as `model`.

| model key | provider | modality | price from | typical time |
|---|---|---|---|---|
| `fal:nano_banana_pro/edit` | fal | image-to-image | $0.15 | ~15 s |

## Example output

- image/png: https://s3.varg.ai/o/job_402db9a5.png

---

Catalog version 2026-11-11T12:59:09.901887+00:00. All models: https://varg.ai/models/llms.txt