Source: https://01router.com/docs/models/nano-banana-2/create
Base URL: https://01router.com/api/v1

# Nano Banana 2 · Create a generation

Pass the model id, its unified input parameters and optionally a provider slug. The response returns immediately with the task id; image models on synchronous providers may already be succeeded.

`POST /api/v1/generations`

Bearer API key

## Input parameters

| Field | Type | Required | Description | Constraints |
| --- | --- | --- | --- | --- |
| model | string | yes | Model slug from the catalog. Project keys may use a project-specific model slug. | options: [   "nano-banana-2" ] |
| input | object | yes | Model-specific input object. See the selected model reference for required fields, defaults and limits. |  |
| provider | string | no | Optional provider slug. Omit for automatic routing; project settings may pin the provider. |  |
| project | string | no | Optional project ID. Use its published model catalog and routing configuration. |  |
| callback_url | string<uri> | no | Public HTTPS URL, up to 1,000 characters. Receives the final generation object. Private network addresses are rejected. |  |
| input.prompt | string | yes |  |  |
| input.image_urls | string<uri>[] | no | Optional — switches to image editing | maxItems: 14 |
| input.aspect_ratio | enum | no |  | default: "1:1"; options: [   "1:1",   "16:9",   "9:16",   "4:3",   "3:4",   "3:2",   "2:3",   "4:5",   "5:4",   "21:9" ] |
| input.resolution | enum | no |  | default: "1K"; options: [   "1K",   "2K",   "4K" ] |
| input.num_images | integer | no |  | default: 1; min: 1; max: 4 |

## Response fields

| Field | Type | Required | Description | Constraints |
| --- | --- | --- | --- | --- |
| id | string | — | Generation ID returned by the create request. |  |
| object | "generation" | — | generation |  |
| model | string | — | Model slug from the catalog. Project keys may use a project-specific model slug. |  |
| type | video \| image \| audio \| chat | — |  |  |
| provider | string | — | Optional provider slug. Omit for automatic routing; project settings may pin the provider. |  |
| status | string | — | queued / processing / succeeded / failed. Stop polling on succeeded or failed. |  |
| input | object | — | Model-specific input object. See the selected model reference for required fields, defaults and limits. |  |
| outputs | string[] | — | Result file URLs. Empty until available; download promptly because URLs may expire. |  |
| error | string \| null | — | Error message on failure; null otherwise. |  |
| credits | number | — | Credits charged for this generation; zero after a refund. |  |
| price_usd | number | — | Price of this generation in USD; zero after a refund. |  |
| created_at | string | — | Creation time in ISO 8601 format. |  |
| completed_at | string \| null | — | Completion time in ISO 8601 format, or null while running. |  |

## cURL

```bash
curl 'https://01router.com/api/v1/generations' \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "nano-banana-2",
  "input": {
    "prompt": "A cinematic landscape at sunrise.",
    "aspect_ratio": "1:1",
    "resolution": "1K",
    "num_images": 1
  }
}'
```

## 200 · application/json

```json
{
  "id": "gen_example",
  "object": "generation",
  "model": "nano-banana-2",
  "type": "image",
  "provider": "fal",
  "status": "processing",
  "input": {
    "prompt": "A cinematic landscape at sunrise.",
    "aspect_ratio": "1:1",
    "resolution": "1K",
    "num_images": 1
  },
  "outputs": [],
  "error": null,
  "credits": 100,
  "price_usd": 1,
  "created_at": "2026-10-25T08:00:00.000Z",
  "completed_at": null
}
```

## Usage notes

- Poll at intervals of at least 3 seconds. A 504 from the synchronous image endpoint means the task may still be running: poll its error.id instead of submitting it again.