# Gemini 3.1 Flash Image Preview · Edit API

> He whakatika Gemini 3.1 Flash Image e whakaae ana hoki ki te horopaki ataata, oro, PDF rānei i te taha o ngā whakaahua

Ka whakatika whakaahua me tētahi `prompt`, mā te whakamahi i `image_urls` me te kōwhiri i `video_url`, `audio_url`, `pdf_url` rānei hei horopaki (kei ia mea te 15MB te mōrahi). Ka tautoko i `resolution` mai i te 0.5K ki te 4K, ngā ōwehenga tino whānui, te rapu tukutuku, `system_prompt` me `thinking_level`. Ka whakahoki i te 1 ki te 4 whakaahua kua whakatikahia.

- Model id: `gemini-3.1-flash-image-preview/edit`
- Made by: Google
- Category: Image Editing
- Output: image
- Price: from $0.06 / image (cheapest run $0.06 (60 API credits))
- Run: `POST https://api.doitong.com/v1/run/gemini-3.1-flash-image-preview/edit`
- Quote: `POST https://api.doitong.com/v1/quote/gemini-3.1-flash-image-preview/edit`
- Docs page: https://doitong.com/mi/developers/models/gemini-3.1-flash-image-preview/edit

## Pricing

Price: **from $0.06 / image** (the lowest tier; the quote prices your exact input). Billed per generated image (`num_images`, default 1).

Price rules (the first rule that matches the input wins; a parameter you leave out counts as its default):

- When `enable_web_search` = true and `resolution` = 0.5K: $0.075 (75 API credits) / image
- When `resolution` = 0.5K: $0.06 (60 API credits) / image
- When `enable_web_search` = true and `resolution` = 1K: $0.095 (95 API credits) / image
- When `resolution` = 1K: $0.08 (80 API credits) / image
- When `enable_web_search` = true and `resolution` = 2K: $0.135 (135 API credits) / image
- When `resolution` = 2K: $0.12 (120 API credits) / image
- When `enable_web_search` = true and `resolution` = 4K: $0.175 (175 API credits) / image
- When `resolution` = 4K: $0.16 (160 API credits) / image

The full example input below costs $0.08 = 80 API credits (1 image × 80 API credits).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). `POST https://api.doitong.com/v1/quote/gemini-3.1-flash-image-preview/edit` with the same JSON body returns the exact price for that input; the quote is exactly what a run charges. Invalid input is never charged and failed or canceled requests are refunded automatically.

## Input parameters

Send either the canonical name or the native field name (not both). Canonical names are the same across models.

| Parameter | Canonical name | Type | Required | Default | Allowed values / range | Description |
|---|---|---|---|---|---|---|
| `prompt` |  | string | yes |  | 3 – 50000 characters | Tohutohu kupu mō te whakatika atahanga. |
| `num_images` | `num_outputs` | integer | no | `1` | 1 – 4 | Te tatau atahanga e tonoa ana mō te whakaputanga. |
| `seed` |  | integer \| null | no |  |  | Uara kākano hei tīmata i te whakaputanga tau matapōkere. |
| `aspect_ratio` |  | enum (string) \| null | no | `auto` | `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` | Āwehenga āhuatanga o te atahanga putanga, tae atu ki ngā kōwhiringa tino rerekē 4:1, 1:4, 8:1, 1:8. |
| `output_format` |  | enum (string) | no | `png` | `jpeg`, `png`, `webp` | Te hōputu kōnae mō te atahanga ka puta. |
| `safety_tolerance` |  | enum (string) | no | `4` | `1`, `2`, `3`, `4`, `5`, `6` | Tautuhia te manawanui moderation ihirangi i waenga i te taumata iti rawa o te aukati, 6, me te taumata tino kaha, 1, e aukati ana i te nuinga o ngā ihirangi. |
| `image_urls` | `images` | array of image URL | no |  |  | Tuku atahanga pūtake mā te URL mō te whakatika atahanga, te whakaputanga atahanga-ki-te-atahanga rānei, ki te kore koe e tuku i te iti rawa kotahi atu tāuru: `video_url`, `audio_url`, `pdf_url` rānei. |
| `system_prompt` |  | string | no | `` | ≤ 50000 characters | He aratohu persona me te kāhua putanga mō te tono katoa, ka tukuna ki Gemini hei tohutohu pūnaha, ki ngā kaiwhakarato OpenAI-hototahi rānei hei karere pūnaha. Kāore he mea e tukuna mō tēnei tohutohu ina wātea-kore te uara. |
| `resolution` |  | enum (string) | no | `1K` | `0.5K`, `1K`, `2K`, `4K` | Taumira mō te atahanga putanga. |
| `video_url` | `video` | string (video URL) \| null | no |  |  | Horopaki ataata kōwhiringa hei URL YouTube, hei URL http(s)/data rānei mō tētahi kōnae ataata. Ka tae tika ngā hononga YouTube ki te tauira me te kore tikiake; ka tikiakehia ngā kōnae ataata, ka tukuna ā-roto, me te tepe 15 MB. |
| `audio_url` | `audio` | string (audio URL) \| null | no |  |  | Tuku horopaki ororongo kōwhiringa mā te URL http(s), data rānei e tohu ana ki tētahi kōnae kaua e nui ake i te 15 MB. Ka tukuna ā-roto te kōnae whai muri i te tikiake. |
| `pdf_url` |  | string \| null | no |  |  | Tuku horopaki PDF kōwhiringa mā te URL http(s), data rānei e tohu ana ki tētahi tuhinga kaua e nui ake i te 15 MB. Ka tukuna ā-roto te tuhinga whai muri i te tikiake. |
| `limit_generations` |  | boolean | no | `true` |  | Tepe whakaputanga whakamātau ka pā pea ki te kounga ina whakahohea. Mā te `True` ka herea ia wāhanga prompting ki te 1 whakaputanga, ka whakakapi i ngā tohutohu tatau-atahanga o te tohutohu, ka wareware hoki ki ngā atahanga takawaenga nā te tauira i whakaputa. |
| `enable_web_search` |  | boolean | no | `false` |  | Takahuri rapu tukutuku mō te whakaputanga atahanga, ka taea ai e te tauira te whakauru i ngā pārongo hou o te ipurangi ki te atahanga. |
| `thinking_level` |  | enum (string) \| null | no |  | `minimal`, `high` | Kōwhiria te 'minimal', te 'high' rānei hei whakahohe i te whakaaro o te tauira ki taua taumata me te whakauru i ōna whakaaro ki te whakaputanga; ki te waiho kia kore e tautuhia, ka noho mono te whakaaro. |

File parameters (`images`, `video`, `audio`) take a public `https://` URL, a `data:` URI up to 10 MB, or the `file_url` of an upload from `POST /files`.

## Example input

Required parameters only:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
}
```

A fuller example:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
}
```

## Run it

Set `DOITONG_API_KEY` to a key from https://doitong.com/developers/dashboard#keys. `?wait=20` returns the finished request in the same call when it is ready within 20 seconds; otherwise poll `GET /requests/{id}` (it also accepts `?wait=`), or pass `webhook_url`.

### curl

```bash
# Run the model; wait up to 20 s for the finished result in the same call
curl -X POST "https://api.doitong.com/v1/run/gemini-3.1-flash-image-preview/edit?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }'

# Still "queued" or "running"? Poll with the id from the response:
curl "https://api.doitong.com/v1/requests/REQUEST_ID?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY"
```

### JavaScript

```javascript
const API = "https://api.doitong.com/v1";
const headers = {
  "Authorization": "Bearer " + process.env.DOITONG_API_KEY,
  "Content-Type": "application/json",
};

// Run the model; wait up to 20 s for the finished result in the same call
let res = await fetch(API + "/run/gemini-3.1-flash-image-preview/edit?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }),
});
let request = await res.json();
if (!res.ok) throw new Error(request.error.code + ": " + request.error.message);

// Not finished yet: long-poll until it is
while (request.status === "queued" || request.status === "running") {
  res = await fetch(API + "/requests/" + request.id + "?wait=20", { headers });
  request = await res.json();
}
if (request.status !== "succeeded") throw new Error(JSON.stringify(request.error));
console.log(request.outputs.map((o) => o.url), request.cost.credits + " API credits ($" + request.cost.usd + ")");
```

### Python

```python
import os
import requests

API = "https://api.doitong.com/v1"
headers = {"Authorization": "Bearer " + os.environ["DOITONG_API_KEY"]}

payload = {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/gemini-3.1-flash-image-preview/edit", params={"wait": 20}, json=payload, headers=headers)
request = r.json()
if not r.ok:
    raise RuntimeError(request["error"]["code"] + ": " + request["error"]["message"])

# Not finished yet: long-poll until it is
while request["status"] in ("queued", "running"):
    request = requests.get(API + "/requests/" + request["id"], params={"wait": 20}, headers=headers).json()
if request["status"] != "succeeded":
    raise RuntimeError(request["error"])
print([o["url"] for o in request["outputs"]], request["cost"]["credits"], "API credits", "$" + request["cost"]["usd"])
```

### MCP

The MCP server at `https://api.doitong.com/v1/mcp` exposes the tools `search_models`, `get_model`, `quote`, `run`, `get_request`, `cancel_request`, `list_requests`, `create_upload` and `get_account`. A `run` call for this model:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "run",
    "arguments": {
      "model_id": "gemini-3.1-flash-image-preview/edit",
      "input": {
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
      },
      "wait_seconds": 20
    }
  }
}
```

## Response

Every call returns a request object. `status` is one of `queued`, `running`, `succeeded`, `failed`, `canceled`. `outputs` lists the generated files with URLs on our storage (kept forever, or 7 days with `?storage=temporary`; `storage` says which); `output` is the model's own result object with the same URLs.

```json
{
  "id": "req_8k2m4q7x1z9c3v5b6n0p2r4t",
  "object": "request",
  "model": "gemini-3.1-flash-image-preview/edit",
  "status": "succeeded",
  "created_at": "2026-10-20T12:00:00Z",
  "started_at": "2026-10-20T12:00:02Z",
  "completed_at": "2026-10-20T12:00:09Z",
  "queue_position": null,
  "cost": {
    "credits": 80,
    "usd": "0.08",
    "charged": 80,
    "refunded": 0
  },
  "input": {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  },
  "output": {
    "images": [
      {
        "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
        "content_type": "image/jpeg",
        "file_name": "0-output.jpeg",
        "file_size": 1843200,
        "width": 1024,
        "height": 768
      }
    ],
    "description": "string"
  },
  "outputs": [
    {
      "type": "image",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
      "content_type": "image/jpeg",
      "file_size": 1843200,
      "width": 1024,
      "height": 768,
      "stored": true
    }
  ],
  "error": null,
  "metrics": {
    "inference_seconds": 6.8
  },
  "urls": {
    "self": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `images` | array of object {url, content_type, file_name, file_size, width, height} | Ngā atahanga i hua mai i te whakatika. |
| `description` | string | Whakamāramatanga e whai ana i ngā atahanga kua whakaputaina. |

## Related models

- [Gemini 3.1 Flash Image Preview](https://doitong.com/developers/models/gemini-3.1-flash-image-preview.md) (`gemini-3.1-flash-image-preview`): from $0.06 / image
- [Nano Banana 2 Edit](https://doitong.com/developers/models/nano-banana-2/edit.md) (`nano-banana-2/edit`): from $0.06 / image
- [Nano Banana Pro Edit](https://doitong.com/developers/models/nano-banana-pro/edit.md) (`nano-banana-pro/edit`): from $0.15 / image
- [FLUX.1 Kontext \[pro\]](https://doitong.com/developers/models/flux-pro/kontext.md) (`flux-pro/kontext`): $0.04 / image
- [GPT Image 2.5 Edit](https://doitong.com/developers/models/openai/gpt-image-2.5/flare/edit.md) (`openai/gpt-image-2.5/flare/edit`): from $0.12 / image
- [Qwen Image 3 Edit](https://doitong.com/developers/models/alibaba/qwen-image-3/edit.md) (`alibaba/qwen-image-3/edit`): from $0.04 / image
- [Seedream 5.0 Pro Edit](https://doitong.com/developers/models/bytedance/seedream/v5/pro/edit.md) (`bytedance/seedream/v5/pro/edit`): from $0.0675 / run of output image
- [Gemini 2.5 Flash Image · Edit](https://doitong.com/developers/models/gemini-25-flash-image/edit.md) (`gemini-25-flash-image/edit`): $0.0398 / image

## Links

- HTML page: https://doitong.com/developers/models/gemini-3.1-flash-image-preview/edit
- All models and guides for AI agents: https://doitong.com/developers/llms.txt
- OpenAPI 3.1 with this model's typed request body: https://doitong.com/developers/openapi.json?model=gemini-3.1-flash-image-preview/edit
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/gemini-3.1-flash-image-preview/edit