> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Use Grok Imagine Video 1.5 Lite with Comfy Router

> Call xai/grok-imagine-video-1.5-lite through Comfy Router: endpoint, request shape and the response Router returns.

API Reference for `xai/grok-imagine-video-1.5-lite`, served by Comfy Router from xAI.

**Input:** Text, Image · **Output:** Video

## Quick start

Create a key in [your Comfy workspace](https://platform.comfy.org/profile/api-keys?onboarding=router) and export it as `COMFY_API_KEY`. The Python and TypeScript snippets use the Comfy SDKs (`pip install comfy-sdk` and `npm install @comfyorg/sdk`); the cURL snippet is the same call over raw HTTP.

**Model ID:** `xai/grok-imagine-video-1.5-lite`

**Endpoint:** `POST https://api.comfy.org/v2/models/xai/grok-imagine-video-1.5-lite`

**Wait for the result**

```python Python theme={null}
from comfy_sdk import Comfy

# Reads COMFY_API_KEY from the environment.
# The SDK automatically creates an idempotency key and reuses it for automatic retries.
with Comfy() as client:
    result = client.models.run(
        "xai/grok-imagine-video-1.5-lite",
        {
            "duration": 4,
            "prompt": "a single red maple leaf falling onto still water, slow motion",
        },
    )

print(result)
```

```typescript TypeScript theme={null}
import { comfy } from "@comfyorg/sdk";

// Reads COMFY_API_KEY from the environment.
// The SDK automatically creates an idempotency key and reuses it for automatic retries.
const { data } = await comfy.models.run("xai/grok-imagine-video-1.5-lite", {
  duration: 4,
  prompt: "a single red maple leaf falling onto still water, slow motion",
});

console.log(data);
```

```bash cURL theme={null}
curl https://api.comfy.org/v2/models/xai/grok-imagine-video-1.5-lite \
  -H "X-API-Key: $COMFY_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d "{\"duration\": 4, \"prompt\": \"a single red maple leaf falling onto still water, slow motion\"}"
```

**Queue and collect later**

The same body, sent to `POST https://api.comfy.org/v2/models/xai/grok-imagine-video-1.5-lite/requests`. Router answers `201` with a `request_id` as soon as the run is admitted, and the result is collected once it is ready, from this process or another one. [Queued delivery](https://docs.comfy.org/development/comfy-router/queue.md) walks through status, cancellation and collection.

```python Python theme={null}
import asyncio
from comfy_sdk import AsyncComfy

# Reads COMFY_API_KEY from the environment.
# Each submit() call mints its own Idempotency-Key and reuses it for automatic retries.
async def main():
    async with AsyncComfy() as client:
        handle = await client.models.submit(
            "xai/grok-imagine-video-1.5-lite",
            {
                "duration": 4,
                "prompt": "a single red maple leaf falling onto still water, slow motion",
            },
        )
        print("request_id:", handle.request_id)  # with the model ID, all another process needs

        # Poll until the request completes, waiting the Retry-After the server names.
        async for update in handle.iter_events():
            print(update.status, update.queue_position)

        # The provider's own payload, the same value models.run() returns.
        # A request that failed or was cancelled raises the typed Router error here.
        result = await handle.get()

    print(result)

asyncio.run(main())
```

```typescript TypeScript theme={null}
import { comfy } from "@comfyorg/sdk";

// Reads COMFY_API_KEY from the environment.
// Each submit() call mints its own Idempotency-Key and reuses it for automatic retries.
const handle = await comfy.models.submit("xai/grok-imagine-video-1.5-lite", {
  duration: 4,
  prompt: "a single red maple leaf falling onto still water, slow motion",
});
console.log("requestId:", handle.requestId); // with the model ID, all another process needs

// Poll until the request completes, waiting the Retry-After the server names.
for await (const update of handle.events()) {
  console.log(update.status, update.queuePosition);
}

// The same result models.run() returns. A request that failed or was cancelled rejects here.
const result = await handle.get();

console.log(result.data);
```

```bash cURL theme={null}
# 1. Submit. Router answers 201 with request_id, status_url, response_url and cancel_url.
curl https://api.comfy.org/v2/models/xai/grok-imagine-video-1.5-lite/requests \
  -H "X-API-Key: $COMFY_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d "{\"duration\": 4, \"prompt\": \"a single red maple leaf falling onto still water, slow motion\"}"

# 2. Poll until status is COMPLETED, waiting the Retry-After seconds each response names.
REQUEST_ID="<request_id from the 201 body>"
curl -i https://api.comfy.org/v2/models/xai/grok-imagine-video-1.5-lite/requests/$REQUEST_ID/status \
  -H "X-API-Key: $COMFY_API_KEY"

# 3. Collect. 200 with the model's native output, 202 with the status body while it is still running.
curl https://api.comfy.org/v2/models/xai/grok-imagine-video-1.5-lite/requests/$REQUEST_ID \
  -H "X-API-Key: $COMFY_API_KEY"
```

## Schema

### Input

**aspect\_ratio** `string` (default: "16:9")

Aspect ratio of the generated video

Possible values: `1:1`, `16:9`, `9:16`, `4:3`, `3:4`, `3:2`, `2:3`

**duration** `integer` (default: 8)

Video duration in seconds. Range \[1, 15]. Default 8.

Range: `1` to `15`

**image** `object`

Input image object for xAI endpoints

**image.type** `string`

Type of the image input

Possible values: `image_url`

**image.url** `string` *required*

URL of the input image (public URL or base64-encoded data URI)

**model** `string`

Model to be used. Supported: grok-imagine-video (default), grok-imagine-video-1.5-preview, grok-imagine-video-1.5, grok-imagine-video-1.5-lite. The deprecated grok-imagine-video-beta id is aliased to grok-imagine-video.

**output** `object`

Optional output destination for generated video

**prompt** `string` *required*

Prompt for video generation. Maximum 4,096 characters.

**reference\_images** `object[]`

One or more reference images to guide the video generation (reference-to-video mode). Mutually exclusive with image. Router forwards application/json only and neither this object nor XAIImageObject accepts a file\_id, so file-backed image inputs are not supported on this route.

**reference\_images\[].url** `string` *required*

URL of the reference image. Supports HTTPS URLs (public) or base64-encoded data URLs (e.g., data:image/jpeg;base64,...).

**resolution** `string`

Resolution of the output video

**size** `string`

Size of the output video

**user** `string`

A unique identifier representing your end-user

Generated from the schema Router serves at `GET /v2/models/xai/grok-imagine-video-1.5-lite/openapi.json`, the same document it validates a call against before the request reaches the provider.

### Output

**block\_reason** `string`

Never carries a reason on this document: a non-empty block reason is an input-moderation refusal, which Router answers as a Comfy Router error rather than with this body. Absent, null or empty here.

**model** `string`

The model used to generate the video

**status** `string`

Absent or `done` on this document. `pending` is the body of a poll Router has not finished and is never returned as a `200`; Router accepts a missing status when `video.url` is populated, so a caller must not require it.

Possible values: `done`

**usage** `object`

Usage information for the video generation request

**usage.cost\_in\_usd\_ticks** `integer`

The cost of this request expressed in USD ticks. One USD cent equals 100,000,000 ticks, so one US dollar equals 10,000,000,000 ticks.

**video** `object` *required*

The finished generation. Required here, unlike on the poll document: a terminal result with no `video.url` is answered as a Comfy Router error, so a `200` always carries it.

**video.duration** `integer`

Duration of the generated video in seconds

**video.respect\_moderation** `boolean`

Whether the video generated by the model respects moderation rules

**video.url** `string` *required*

Non-empty on this document. Router reports success only when this leaf is populated; it is the re-hosted Comfy-signed URL described above, or xAI's own short-lived URL when the re-host could not be performed.

## Examples

### Input

```json theme={null}
{
  "duration": 4,
  "prompt": "a single red maple leaf falling onto still water, slow motion"
}
```

### Output

```json theme={null}
{
  "model": "grok-imagine-video-1.5-lite",
  "status": "done",
  "usage": {
    "cost_in_usd_ticks": 3500000000
  },
  "video": {
    "duration": 4,
    "respect_moderation": true,
    "url": "https://example.invalid/xai/grok-imagine-video/generated.mp4"
  }
}
```

## Before you ship

The SDKs create an `Idempotency-Key` and reuse it for automatic retries. For manual retries, reuse the original key. Router can hold the connection for up to 10 minutes.

When a request fails, Router sends an `X-Comfy-Error-Type` response header explaining why. A `422` means Router rejected the input before calling the provider, and a `413` means the request body was larger than Router accepts. Download generated assets promptly because [result URLs can expire](https://docs.comfy.org/development/comfy-router/reference.md#result-assets).

Any size limit named in a field description above is the provider's own bound on that field, quoted from the provider's specification. Router applies a separate cap to the whole request body, which base64-encoded media counts against: see [request body size](https://docs.comfy.org/development/comfy-router/limitations.md#request-bodies-are-capped).

This page documents one partner model called through Comfy Router. The same `comfy-sdk` / `@comfyorg/sdk` package also ships a second client, for running a whole ComfyUI workflow graph on Comfy Cloud: `Comfy(api_key=...)` / `new Comfy({ apiKey })`, with `client.workflows`, `client.assets` and `client.jobs`. See [Comfy SDKs](https://docs.comfy.org/development/api-development/sdks.md).

> **[Headers](https://docs.comfy.org/development/comfy-router/headers.md)**
>
> Authentication, idempotency, request IDs, error buckets, retry pacing, spend limits.

> **[Using the Router API](https://docs.comfy.org/development/comfy-router/api.md)**
>
> Model discovery, validation errors, retries, and billing.

> **[Limitations](https://docs.comfy.org/development/comfy-router/limitations.md)**
>
> What Router does not do today, and what to use instead.


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