Video

Grok Extend Video

Credit-based pricing. Supports reference video.

Try Grok Extend Video →Compare models

Output

video

Duration

4s, 6s, 8s

Inputs

Reference video (required)

Example prompt

Continue the scene naturally — the character keeps walking toward the horizon as the sky deepens to amber and violet, seamless motion, cinematic pacing

Try this prompt →

LLM-ready

API & LLM schema

Exact request contract for this model. Agents can fetch it from /api/v1/models?id=xai/grok-imagine-video/extend-video.

POST/api/v1/generate9 fields · 3 required

Field	Type	Requirement	Contract
`model_id`	constant	Required	ArtEmotion model identifier.
`extra`	object	Optional	Model-specific settings may also be nested here.
`max_credits`	number	Optional	Reject before submission if the estimated list price exceeds this cap. · Range: 1–…
`webhook_url`	string	Optional	Format: uri
`webhook_secret`	string	Optional	Optional model input.
`folder_id`	string	Optional	Optional model input.
`prompt`	string	Required	Optional model input.
`duration`	number	Optional	Allowed: 4, 6, 8
`video_url`	string	Required	Format: uri

Minimal request example

{
  "model_id": "xai/grok-imagine-video/extend-video",
  "prompt": "Continue the scene naturally — the character keeps walking toward the horizon as the sky deepens to amber and violet, seamless motion, cinematic pacing",
  "video_url": "https://example.com/video"
}

Raw JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.artemotion.ai/api/v1/models?id=xai%2Fgrok-imagine-video%2Fextend-video",
  "title": "Grok Extend Video generation request",
  "description": "Request body accepted by POST /api/v1/generate for xai/grok-imagine-video/extend-video.",
  "type": "object",
  "properties": {
    "model_id": {
      "type": "string",
      "const": "xai/grok-imagine-video/extend-video",
      "description": "ArtEmotion model identifier."
    },
    "extra": {
      "type": "object",
      "additionalProperties": true,
      "description": "Model-specific settings may also be nested here."
    },
    "max_credits": {
      "type": "number",
      "minimum": 1,
      "description": "Reject before submission if the estimated list price exceeds this cap."
    },
    "webhook_url": {
      "type": "string",
      "format": "uri",
      "maxLength": 2048
    },
    "webhook_secret": {
      "type": "string",
      "maxLength": 512
    },
    "folder_id": {
      "type": "string"
    },
    "prompt": {
      "type": "string"
    },
    "duration": {
      "type": "number",
      "enum": [
        4,
        6,
        8
      ]
    },
    "video_url": {
      "type": "string",
      "format": "uri"
    }
  },
  "required": [
    "model_id",
    "prompt",
    "video_url"
  ],
  "additionalProperties": false
}

Browse schemas for every ArtEmotion model →

FAQ

How much does Grok Extend Video cost on ArtEmotion?

Credit-based pricing. You pay in ArtEmotion credits — every plan and top-up converts USD to credits at a fixed rate.

Do I get my credits back if Grok Extend Video fails?

Yes — failed generations are never charged. The credits are released back to your balance automatically.

Can I call Grok Extend Video from the API?

Yes. Use POST /api/v1/generate with model_id: "xai/grok-imagine-video/extend-video". See the API reference for the full schema.

Where are my generations stored?

Every output is saved to your personal Library. You can export or delete everything any time from Privacy & deletion.

Ready to generate with Grok Extend Video?

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No commitment. New accounts get 50 free credits on signup. See pricing.