# FLUX 3 Max Keyframes to Video API

> ᡩᡠᠯᡤᠠᠨ ᡳᠯᡤᠠᠨ ᡳᠨᡠ ᡝᠮᡠ ᡩᡠᠯᡳᠨ ᡩᡝ ᡝᠮᡠ ᡩᡠᠯᡳᠨ ᡩᡝ 10 ᡩᡝᠴᡳᡵᡝ ᠵᠢᠯᡤᠠᠨ ᡩᡝ ᡝᠮᡠ ᡩᡠᠯᡳᠨ ᡳᠯᡤᠠᠨ ᡩᡝ ᡳᠯᡳᠪᡠᠮᡝ ᡤᡠᠰᡳᠨ ᡤᡠᠮᡳᠯᡠᠨ ᡤᡝᠨᡝᡵᡝᠮᡝ ᡠᠨᡩᡝᠰᡳ ᡩᡝ ᡳᠯᡳᠪᡠᡥᠠ ᡤᡠᠰᡳᠨ ᠵᡠᠰᡳ ᠪᡝ ᡳᠯᡳᠪᡠᠮᡝ ᡩᡠᠯᡳᠨ ᠪᡝ ᡠᠨᡩᡝᠰᡳᡵᡝ ᡤᡠᠮᡳᠯᡠᠨ ᡩᡝ ᡠᠮᡝᠰᡳ ᡩᠠᠮᡠ ᡩᡝᠨᡩᡝᠯᡝᠮᡝ ᡳᠯᡳᠪᡠᠮᡝ ᡤᡝᠨᡝᡵᡝᠮᡝ ᡤᡝᠪᡠᠮᡝ

ᡳᠨᡝᠩᡤᡳ ᠵᡠᠰᡠ ᡩᡝ ᡳᠯᡳᠪᡠᡥᠠ ᠵᠠᠯᡤᠠᠨ ᡤᡝᠰᡳᡥᡝ ᠵᠠᠯᡳᠨ ᡝᠮᡤᡳ ᠪᡝᠶᡝ ᠪᡝᡳᠯᡝᠨᡳ ᡤᡝᠮᡠ ᡥᡡᠯᠠᠨ ᡤᡝᠨᡝᡥᡝ ᡥᡡᠯᠠᠨ ᡳᠯᡳᠪᡠᠮᠪᡳ᠉ `keyframes` ᡳᠨᡠ 1 ᡩᡝᡵᡳ 10 ᡩᡝ ᡩᠠᠯᠵᡳᠨ ᡥᡡᠯᠠᠨ ᠪᡝ ᠠᠪᡠᠮᠪᡳ᠂ ᠵᡠᠯᡤᡝᠨ `frame_index` ᡩᠠᠯᠵᡳᠨ ᠪᡳ᠉ `prompt` ᡳᠨᡠ ᡤᡝᠮᡠ ᠵᠠᠯᡳᠨ ᡳᠯᡳᠪᡠᠨᡳ ᠠᠵᡳᡤᡝ ᠠᠮᠪᠠᠨ ᠪᡝ ᡥᡡᠯᠠᠮᠪᡳ᠉ `duration` ᡳᠨᡠ 5 ᡩᡝᡵᡳ 20 ᠰᡝᡴᡠᠨᡩ ᡩᡝᠨᡩᡝᠨᡝᠮᠪᡳ᠂ `resolution` ᡳᠨᡠ 720p ᠠᠯᡳ 1080p᠂ `aspect_ratio` ᡳᠨᡠ 21:9 ᡩᡝᡵᡳ 9:16 ᠠᠯᡳ auto ᠪᡝ ᠠᠪᡠᠮᠪᡳ᠉ `reasoning_level` (low ᠠᠯᡳ high) ᠪᡝ `generate_audio` ᡳ ᠮᡠᠶᠠᡥᠠ ᠪᡳ᠉

- Model id: `blackforestlabs/flux-3-max/keyframes-to-video`
- Made by: Black Forest Labs
- Category: Image to Video
- Output: video
- Price: from $0.0425 / second (5 s ≈ $0.213) (cheapest run $0.213 (213 API credits))
- Run: `POST https://api.doitong.ru/v1/run/blackforestlabs/flux-3-max/keyframes-to-video`
- Quote: `POST https://api.doitong.ru/v1/quote/blackforestlabs/flux-3-max/keyframes-to-video`
- Docs page: https://doitong.com/mnc/developers/models/blackforestlabs/flux-3-max/keyframes-to-video

## Pricing

Price: **from $0.0425 / second (5 s ≈ $0.213)** (the lowest tier; the quote prices your exact input). Billed per second of output (`duration`, default 20).

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

- When `resolution` = 1080p: $0.0725 (72.5 API credits) / second

The full example input below costs $0.425 = 425 API credits (5 s × 85 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.ru/v1/quote/blackforestlabs/flux-3-max/keyframes-to-video` 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

| Parameter | Canonical name | Type | Required | Default | Allowed values / range | Description |
|---|---|---|---|---|---|---|
| `prompt` |  | string | yes |  | ≥ 1 characters | ᡶᡳᠯᡝᠮᡝᠨᡳ ᡩᡝᠰᡝ ᠰᡠᠨᡤᠠᡳ ᡠᠯᡥᠠᠯᠠᠨ. |
| `keyframes` |  | array of object {image_url, frame_index} | yes |  | 1 – 10 items | ᡩᡝᠰᡝᠮᡝᠨᡳ ᡤᠠᠳᠠᠨ ᠪᡠᠶᡝᠮᡝᠨᡩᡝ `frame_index` ᠶᠠᠪᡠᠮᠪᡳ, 10 ᠠᠴᠠ ᡝᠮᡤᡝᠯᡝᠨ ᠪᡠᠮᡝ. |
| `keyframes[].image_url` |  | string (image URL) | yes |  |  | ᡩᡝᠰᡝᠮᡝᠨᡳ ᡤᠠᠳᠠᠨᡳ URL, PNG, JPEG, ᠪᠠᡳ WebP ᠪᡠᠮᡝ. |
| `keyframes[].frame_index` |  | integer | yes |  | ≥ 0 | ᡩᡝᠰᡝᠮᡝᠨᡳ ᡤᠠᠳᠠᠨ ᡝᠮᡤᡝᠯᡝᠨ ᡶᡳᠯᡝᠮᡝᡩᡝ ᠪᡳ, `duration * 24` ᠠᠴᠠ ᠣᠮᠪᡳ; ᠪᡠᠶᡝᠮᡝ 24 fps. |
| `duration` |  | enum (integer) | no | `5` | `5`, `6`, `7`, `8`, `9`, `10`, `11`, `12`, `13`, `14`, `15`, `16`, `17`, `18`, `19`, `20` | ᠪᡠᠶᡝᠮᡝᠨᡳ ᠰᡠᠨᡤᠠᡳ ᡤᠠᠨᠠᠯ, ᠰᡝᡴᡠᠨᡩᡝ ᡩᠠᠮᡠ. |
| `resolution` |  | enum (string) | no | `720p` | `720p`, `1080p` | ᠪᡠᠶᡝᠮᡝᠨᡳ ᠰᡠᠨᡤᠠᡳ ᠵᠠᠯᠠᠨ. |
| `reasoning_level` |  | enum (string) | no | `high` | `low`, `high` | ᡥᡡᠯᠠᠨᡳ ᡤᠠᠯᡤᠠᠨ ᠪᡠᠶᡝᠮᡝᠨᡳ ᠵᠠᠪᠰᡳᠨ ᠵᠠᠯᠠᠮᠪᡳ: ᠮᡝᠨᡝᠮᡝ ᠵᠠᠯᡠᠮᠪᡳ. |
| `aspect_ratio` |  | enum (string) | no | `auto` | `auto`, `21:9`, `2:1`, `16:9`, `4:3`, `1:1`, `3:4`, `9:16` | ᠪᡠᠶᡝᠮᡝᠨᡳ ᠰᡠᠨᡤᠠᡳ ᠵᠠᠯᠠᠨ, `auto` ᡝᠯᡝ ᡝᡵᡝᠮᡝ ᠪᡠᠮᡝᠨᡳ ᡝᠯᡝ ᡤᠠᠳᠠᠨᡳ ᠵᠠᠯᠠᠨᡩᡝ ᠵᠠᠯᠠᠮᠪᡳ, ᡥᡡᠯᠠᠨ ᠪᡳ 16:9 ᠵᠠᠯᠠᠮᠪᡳ. |
| `generate_audio` |  | boolean | no | `true` |  | ᠰᡠᠨᡤᠠᡩᡝ ᠪᡠᠶᡝᡥᠠᠨ ᡤᡳᠰᡠᠨ ᠪᡳ ᠠᡴᡳ. |
| `seed` |  | integer \| null | no |  |  | ᠪᡠᠶᡝᠮᡝᠨᡳ ᠵᠠᠪᠰᡳᠨ, ᡝᠮᡤᡝᠯᡝᠨ ᠪᡳ ᠵᠠᠯᡠ ᠵᠠᠪᠰᡳᠨ. |

## Example input

Required parameters only:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "keyframes": [
    {
      "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
      "frame_index": 0
    }
  ]
}
```

A fuller example:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "keyframes": [
    {
      "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
      "frame_index": 0
    }
  ]
}
```

## 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.ru/v1/run/blackforestlabs/flux-3-max/keyframes-to-video?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",
    "keyframes": [
      {
        "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
        "frame_index": 0
      }
    ]
  }'

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

### JavaScript

```javascript
const API = "https://api.doitong.ru/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/blackforestlabs/flux-3-max/keyframes-to-video?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",
    "keyframes": [
      {
        "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
        "frame_index": 0
      }
    ]
  }),
});
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.ru/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",
    "keyframes": [
        {
            "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
            "frame_index": 0,
        },
    ],
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/blackforestlabs/flux-3-max/keyframes-to-video", 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.ru/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": "blackforestlabs/flux-3-max/keyframes-to-video",
      "input": {
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
        "keyframes": [
          {
            "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
            "frame_index": 0
          }
        ]
      },
      "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": "blackforestlabs/flux-3-max/keyframes-to-video",
  "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": 425,
    "usd": "0.425",
    "charged": 425,
    "refunded": 0
  },
  "input": {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "keyframes": [
      {
        "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
        "frame_index": 0
      }
    ]
  },
  "output": {
    "video": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_name": "0-output.mp4",
      "file_size": 1843200,
      "width": 1024,
      "height": 768,
      "fps": 1.0,
      "duration": 5,
      "num_frames": 1
    },
    "seed": 42,
    "timings": {}
  },
  "outputs": [
    {
      "type": "video",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_size": 1843200,
      "width": 1280,
      "height": 720,
      "duration": 5,
      "stored": true
    }
  ],
  "error": null,
  "metrics": {
    "inference_seconds": 6.8
  },
  "urls": {
    "self": "https://api.doitong.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `video` | object {url, content_type, file_name, file_size, width, height, fps, duration, num_frames} | ᠮᠣᠳᡝᠯ ᠪᡠᠶᡝᡥᠠᠨ ᠰᡠᠨᡤᠠ. |
| `seed` | integer | ᠪᡠᠶᡝᠮᡝᠨᡳ ᠰᡝᠨᡩᡝᠨᡳ ᠵᠠᠯᡳᠨ᠉ |
| `timings` | object | ᡩᠠᠯᡤᠠᠨᡳ ᡩᠠᠮᡠ, ᡥᡡᠯᠠᠨᡳ ᡩᠠᠯᡤᠠᠯᠠᠮᠪᡳ, ᡩᡝᡴᡳᠨᡤᡝ ᠪᠠᡳ ᠣᠷᡳᠯᠠᠮᠪᡳ, `inference` ᠠᠯᡤᠠᠨ ᠰᡝᡴᡠᠨᡩᡝ ᠵᠠᠯᡠᠮᠪᡳ. |

## Related models

- [FLUX 3 Max Text to Video](https://doitong.com/developers/models/blackforestlabs/flux-3-max/text-to-video.md) (`blackforestlabs/flux-3-max/text-to-video`): from $0.0425 / second of output video
- [FLUX 3 Max Image to Video](https://doitong.com/developers/models/blackforestlabs/flux-3-max/image-to-video.md) (`blackforestlabs/flux-3-max/image-to-video`): from $0.0425 / second of output video
- [Grok Imagine Video 1.5 Image to Video](https://doitong.com/developers/models/xai/grok-imagine-video/v1.5/image-to-video.md) (`xai/grok-imagine-video/v1.5/image-to-video`): from $0.082 / second
- [Kling 3.0 Pro Image to Video](https://doitong.com/developers/models/kling-video/v3/pro/image-to-video.md) (`kling-video/v3/pro/image-to-video`): from $0.112 / second
- [LTX 2.5 Pro Image to Video](https://doitong.com/developers/models/lightricks/ltx-2.5/image-to-video/pro.md) (`lightricks/ltx-2.5/image-to-video/pro`): from $0.12 / second
- [MiniMax H3 Image to Video](https://doitong.com/developers/models/minimax/h3/image-to-video.md) (`minimax/h3/image-to-video`): from $0.05 / second
- [Seedance 2.0 Fast Image to Video](https://doitong.com/developers/models/bytedance/seedance-2.0/fast/image-to-video.md) (`bytedance/seedance-2.0/fast/image-to-video`): from $0.113 / second
- [Seedance 2.0 Image to Video](https://doitong.com/developers/models/bytedance/seedance-2.0/image-to-video.md) (`bytedance/seedance-2.0/image-to-video`): from $0.141 / second

## Links

- HTML page: https://doitong.com/developers/models/blackforestlabs/flux-3-max/keyframes-to-video
- 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=blackforestlabs/flux-3-max/keyframes-to-video
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/blackforestlabs/flux-3-max/keyframes-to-video