# Gemini 3.1 Flash Image Preview · Edit API

> Uhariri wa picha wa Gemini 3.1 Flash Image unaokubali pia muktadha wa video, sauti au PDF pamoja na picha

Huhariri picha kwa kutumia `prompt`, `image_urls` na kwa hiari `video_url`, `audio_url` au `pdf_url` kama muktadha (kila kimoja kikiwa na kikomo cha 15MB). Huwezesha `resolution` kuanzia 0.5K hadi 4K, uwiano uliokithiri wa picha, utafutaji wa wavuti, `system_prompt` na `thinking_level`. Hurudisha picha 1 hadi 4 zilizohaririwa.

- 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/sw/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 | Maelekezo ya maandishi ya kuhariri picha. |
| `num_images` | `num_outputs` | integer | no | `1` | 1 – 4 | Idadi ya picha iliyoombwa kwa uzalishaji. |
| `seed` |  | integer \| null | no |  |  | Thamani ya mbegu inayoanzisha uzalishaji wa nambari nasibu. |
| `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` | Uwiano wa picha ya tokeo, ukijumuisha chaguo kali 4:1, 1:4, 8:1, 1:8. |
| `output_format` |  | enum (string) | no | `png` | `jpeg`, `png`, `webp` | Muundo wa faili wa picha inayotokana. |
| `safety_tolerance` |  | enum (string) | no | `4` | `1`, `2`, `3`, `4`, `5`, `6` | Weka ustahimilivu wa udhibiti wa maudhui kati ya kiwango kisicho na vizuizi zaidi, 6, na kiwango kikali zaidi, 1, kinachozuia maudhui mengi. |
| `image_urls` | `images` | array of image URL | no |  |  | Toa picha chanzo kwa URL kwa uhariri wa picha au uzalishaji wa picha-kwa-picha, isipokuwa utoe angalau ingizo moja mbadala: `video_url`, `audio_url`, au `pdf_url`. |
| `system_prompt` |  | string | no | `` | ≤ 50000 characters | Mwongozo wa hiari wa persona na mtindo wa tokeo kwa ombi lote, unaowasilishwa kwa Gemini kama maagizo ya mfumo au kwa watoa huduma wanaoendana na OpenAI kama ujumbe wa mfumo. Hakuna kinachotumwa kwa maagizo haya thamani ikiwa tupu. |
| `resolution` |  | enum (string) | no | `1K` | `0.5K`, `1K`, `2K`, `4K` | Mwonekano wa picha ya tokeo. |
| `video_url` | `video` | string (video URL) \| null | no |  |  | Muktadha wa video wa hiari unaotolewa kama URL ya YouTube au URL ya http(s)/data ya faili ya video. Viungo vya YouTube hufikia modeli moja kwa moja bila kupakua; faili za video hupakuliwa na kutumwa ndani, zikiwa na kikomo cha juu cha 15 MB. |
| `audio_url` | `audio` | string (audio URL) \| null | no |  |  | Toa muktadha wa sauti wa hiari kupitia URL ya http(s) au data inayoelekeza kwenye faili isiyozidi 15 MB. Faili hutumwa ndani baada ya kupakuliwa. |
| `pdf_url` |  | string \| null | no |  |  | Toa muktadha wa PDF wa hiari kupitia URL ya http(s) au data inayoelekeza kwenye hati isiyozidi 15 MB. Hati hutumwa ndani baada ya kupakuliwa. |
| `limit_generations` |  | boolean | no | `true` |  | Kikomo cha majaribio cha uzalishaji ambacho kinaweza kuathiri ubora kinapowezeshwa. Kwa `True`, kila mzunguko wa uombaji huzuiwa kuwa uzalishaji 1, kikibatilisha maelekezo ya idadi ya picha kwenye kidokezo na kupuuza picha za kati zilizozalishwa na modeli. |
| `enable_web_search` |  | boolean | no | `false` |  | Kigeuzi cha utafutaji wa wavuti kwa uzalishaji wa picha, kinachoruhusu modeli kujumuisha maelezo ya kisasa yanayopatikana mtandaoni kwenye picha. |
| `thinking_level` |  | enum (string) \| null | no |  | `minimal`, `high` | Chagua 'minimal' au 'high' ili kuwezesha fikra za modeli katika kiwango hicho na kujumuisha fikra zake kwenye uzalishaji; kuacha kiwango bila kuwekwa huweka fikra zimezimwa. |

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} | Picha zinazotokana na uhariri. |
| `description` | string | Maelezo yanayoandamana na picha zilizozalishwa. |

## 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