xAI: Grok Imagine Video 1.5 (Image to Video) API Reference

About

Generate videos from images with audio using xAI's Grok Imagine 1.5 Video model.

1. Calling the API

Setup your API Key

To begin using Infron, you first need to create an account and generate your API Key.

Once you have your API key, set it as an environment variable in your runtime environment. This allows your applications to securely access Infron’s API.

export INFRON_KEY="YOUR_API_KEY"

Submit a request

For long-running requests, you can poll for results.

curl https://media.onerouter.pro/v1/videos/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d @- <<'EOF'
{
  "model": "x-ai/grok-imagine-video-1.5/image-to-video",
  "prompt": "(0-5s) Medium shot, she speaks warmly while gesturing to a product. (5-10s) Slow push-in to a close-up, glowing skin and expressive eyes. (10-15s) Cut to an over-shoulder framing of the vanity as she smiles. Glossy, warm, cinematic.",
  "image_urls": ["https://storage.googleapis.com/infron_gcs/quick-upload/2026/06/22/20260622-210539-76926046-1.png"],
  "duration": 15,
  "aspect_ratio": "16:9",
  "resolution": "720p",
  "n": 1
}
EOF

Response with queue task id

The response will look like this:

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "2ff5dd1094144021b07577893465e5ac",
    "object": "video",
    "model": "x-ai/grok-imagine-video-1.5/image-to-video",
    "status": "created",
    "urls": {
      "query": "https://media.onerouter.pro/v1/videos/tasks/2ff5dd1094144021b07577893465e5ac"
    },
    "created_at": "2026-06-23 07:49:43.46"
  }
}

Fetch request status

You can fetch the status of a request to check if it is completed or still in progress.

curl https://media.onerouter.pro/v1/videos/tasks/{task_id} \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" 

# For example
curl https://media.onerouter.pro/v1/videos/tasks/2ff5dd1094144021b07577893465e5ac \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json"

Response with queue task status query

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "2ff5dd1094144021b07577893465e5ac",
    "object": "video",
    "model": "x-ai/grok-imagine-video-1.5/image-to-video",
    "status": "in_progress",
    "fail_reason": "",
    "submit_time": 1782200983,
    "start_time": 1782200984,
    "finish_time": 0,
    "outputs": [],
    "created_at": "2026-06-23 07:49:43"
  }
}

Possible statuses:

created
in_progress
processing
completed
failed

created -> in_progress → processing → completed | failed

Poll every 1-2 seconds until status is "completed" or "failed"

Get the result (when status is "completed")

Once the request is completed, you can fetch the result. See the Output Schema for the expected result format.

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "2ff5dd1094144021b07577893465e5ac",
    "object": "video",
    "model": "x-ai/grok-imagine-video-1.5/image-to-video",
    "status": "completed",
    "fail_reason": "",
    "submit_time": 1782200983,
    "start_time": 1782200984,
    "finish_time": 1782201105,
    "outputs": [
      "https://storage.googleapis.com/infron_gcs/video%2Fvideo_v2%2Foutput%2Foutput_9a9698ee-9d07-4ab8-8820-0ac2977593e5.mp4"
    ],
    "usage": {
      "completion_tokens": 0,
      "duration": 15,
      "generate_audio": false,
      "output_count": 1,
      "prompt_tokens": 1,
      "request_num": 1,
      "resolution": "720p",
      "tokens": 1,
      "total_tokens": 1,
      "video_duration": 15
    },
    "cost": {
      "total_cost": 2.11,
      "cost_details": {
        "prompt_cost": 0,
        "completion_cost": 0,
        "image_cost": 0,
        "video_cost": 2.11,
        "audio_cost": 0,
        "native_web_search_cost": 0,
        "plugin_web_search_cost": 0,
        "tools_cost": 0,
        "prompt_cache_read_cost": 0,
        "prompt_cache_write_cost": 0,
        "prompt_cache_write_5_min": 0,
        "prompt_cache_write_1_h": 0,
        "reasoning_cost": 0,
        "discount_rate": 1,
        "is_byok": false,
        "byok_cost": 0
      }
    },
    "created_at": "2026-06-23 07:49:43"
  }
}

2. Schema

Input

Parameter	Type	Required	Default	Range	Description
model	string	Yes	--	Explore all models	Model name.
prompt	string	Yes	--	--	Text prompt for generation; Positive text prompt.
image_urls	array	Yes	--	[1]	Image URLs.
duration	integer	No	--	[1,15]	Duration of the video in seconds, between 1 and 15.
aspect_ratio	string	No	`16:9`	`1:1`, `16:9`, `9:16`, `4:3`, `3:4`, `3:2`, `2:3`	Aspect ratio of the generated video.
resolution	string	No	`480p`	`480p`, `720p`	Resolution of the generated video.
n	integer	No	`1`	[1]	Number of videos to generate.

Example request

curl https://media.onerouter.pro/v1/videos/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d @- <<'EOF'
{
  "model": "x-ai/grok-imagine-video-1.5/image-to-video",
  "prompt": "(0-5s) Medium shot, she speaks warmly while gesturing to a product. (5-10s) Slow push-in to a close-up, glowing skin and expressive eyes. (10-15s) Cut to an over-shoulder framing of the vanity as she smiles. Glossy, warm, cinematic.",
  "image_urls": ["https://storage.googleapis.com/infron_gcs/quick-upload/2026/06/22/20260622-210539-76926046-1.png"],
  "duration": 15,
  "aspect_ratio": "16:9",
  "resolution": "720p",
  "n": 1
}
EOF

Output

Parameter	Type	Range	Description
code	integer	--	Status code of the request.
message	string	--	Status message of the request.
data	object	--	Data of the video task.
data.task_id	string	--	ID of the video task.
data.object	string	--	Object type of the video task.
data.model	string	--	Model name of the video task.
data.status	string	`created`, `in_progress`, `processing`, `completed`, `failed`	Status of the video task.
data.fail_reason	string	--	Fail reason of the video task.
data.submit_time	integer	--	Timestamp of the video task submission.
data.start_time	integer	--	Timestamp of the video task start.
data.finish_time	integer	--	Timestamp of the video task finish.
data.outputs	array	--	Outputs of the video task.
data.created_at	string	--	Timestamp of the video task creation.

Example output

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "2ff5dd1094144021b07577893465e5ac",
    "object": "video",
    "model": "x-ai/grok-imagine-video-1.5/image-to-video",
    "status": "completed",
    "fail_reason": "",
    "submit_time": 1782200983,
    "start_time": 1782200984,
    "finish_time": 1782201105,
    "outputs": [
      "https://storage.googleapis.com/infron_gcs/video%2Fvideo_v2%2Foutput%2Foutput_9a9698ee-9d07-4ab8-8820-0ac2977593e5.mp4"
    ],
    "usage": {
      "completion_tokens": 0,
      "duration": 15,
      "generate_audio": false,
      "output_count": 1,
      "prompt_tokens": 1,
      "request_num": 1,
      "resolution": "720p",
      "tokens": 1,
      "total_tokens": 1,
      "video_duration": 15
    },
    "cost": {
      "total_cost": 2.11,
      "cost_details": {
        "prompt_cost": 0,
        "completion_cost": 0,
        "image_cost": 0,
        "video_cost": 2.11,
        "audio_cost": 0,
        "native_web_search_cost": 0,
        "plugin_web_search_cost": 0,
        "tools_cost": 0,
        "prompt_cache_read_cost": 0,
        "prompt_cache_write_cost": 0,
        "prompt_cache_write_5_min": 0,
        "prompt_cache_write_1_h": 0,
        "reasoning_cost": 0,
        "discount_rate": 1,
        "is_byok": false,
        "byok_cost": 0
      }
    },
    "created_at": "2026-06-23 07:49:43"
  }
}

3. Detailed Pricing

Pricing Type	Unit	Price
Input image	1 image	$0.010
Output video	1 second	$0.080–$0.140

Resolution	Estimated Price
480p	$0.080 / second
720p	$0.140 / second