curl --request POST \
  --url https://api.modellix.ai/api/v1/xai/grok-imagine-video-extend \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "prompt": "The camera continues forward into the tunnel",
  "video": "https://example.com/input.mp4"
}
'

{
  "code": 0,
  "message": "success",
  "data": {
    "status": "pending",
    "task_id": "task-xai-v2v-002",
    "model_id": "xai/grok-imagine-video-extend",
    "get_result": {
      "method": "GET",
      "url": "https://api.modellix.ai/api/v1/tasks/task-xai-v2v-002"
    }
  }
}

{
  "code": 400,
  "message": "Invalid parameters: parameter 'video' is required"
}

{
  "code": 401,
  "message": "Authentication failed: invalid API key"
}

{
  "code": 429,
  "message": "Rate limit exceeded: 100 requests per minute, retry after 60 seconds"
}

{
  "code": 500,
  "message": "Internal server error"
}

Grok Imagine Video Extend

[Core Function] Grok Imagine Video Extend continues an existing video, generating additional footage beyond its end. [Strengths] It excels at seamlessly extending a clip with new prompt-guided motion. [Best For] Highly recommended for: lengthening short clips, continuing a scene, and adding follow-on action. [Limitations] Do NOT use the duration parameter expecting it to set the total video length; it only controls the length of the appended segment (2-10 seconds). Input video constraints are enforced by the upstream provider. [Routing] Use this model when the user wants to make a video longer. To restyle or modify an existing video, use Video Edit.

POST

xai

grok-imagine-video-extend

curl --request POST \
  --url https://api.modellix.ai/api/v1/xai/grok-imagine-video-extend \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "prompt": "The camera continues forward into the tunnel",
  "video": "https://example.com/input.mp4"
}
'

{
  "code": 0,
  "message": "success",
  "data": {
    "status": "pending",
    "task_id": "task-xai-v2v-002",
    "model_id": "xai/grok-imagine-video-extend",
    "get_result": {
      "method": "GET",
      "url": "https://api.modellix.ai/api/v1/tasks/task-xai-v2v-002"
    }
  }
}

{
  "code": 400,
  "message": "Invalid parameters: parameter 'video' is required"
}

{
  "code": 401,
  "message": "Authentication failed: invalid API key"
}

{
  "code": 429,
  "message": "Rate limit exceeded: 100 requests per minute, retry after 60 seconds"
}

{
  "code": 500,
  "message": "Internal server error"
}

Authorizations

Authorization

string

header

required

API Key authentication. Format: Bearer YOUR_API_KEY.

Body

application/json

xAI Grok Imagine video extend request. duration controls the length of the appended segment, not the total video length.

prompt

string

required

Text description guiding the extended footage

Minimum string length: 1

Example:

"The camera continues forward into the tunnel"

video

string

required

Input video URL or base64 data URI

Minimum string length: 1

Example:

"https://example.com/input.mp4"

duration

integer

default:6

Length in seconds of the appended segment (not the total video length)

Required range: 2 <= x <= 10

Example:

8

Response

Task submitted successfully

code

integer

required

Response code, 0 indicates success

Example:

0

message

string

required

Response message

Example:

"success"

data

object

required

Detailed data about the submitted asynchronous task.

Show child attributes

Grok imagine video edit Grok imagine video i2v