Grok Imagine Video Extend

Grok Imagine Video Extend is a specialized SandBase endpoint built to continue an existing clip beyond its current endpoint. It is most useful when teams need prompt-directed continuation that carries motion and scene logic into a new segment, with the route’s inputs defining a repeatable production contract instead of leaving critical delivery choices to an ad-hoc manual workflow.

Use this exact route when its input mode matches the creative asset already in hand: describe the visual or spoken result clearly, set only the controls that support the intended delivery, and keep the subject, action, environment, camera or performance direction internally consistent. The result is returned asynchronously as a downloadable media URL suitable for review, automation, or downstream finishing.

Highlights

• Continuation beyond the cut. Generate what happens after an existing clip ends, using the source endpoint as the visual and temporal handoff.
• Prompt-directed next action. Describe the following movement, camera behavior, or story beat so the extension has a specific purpose rather than generic motion.
• Codec-friendly source handling. The route accepts MP4 sources encoded with H.264, H.265, or AV1 across the documented 2–15 second input window.
• Adjustable added length. Request 2–10 seconds of new footage to bridge a transition, hold a scene, or complete an interrupted action.

Pricing

Pricing scales with extension duration. The configured formula uses $0.0600 per second at its standard tier and $0.0800 per second when the resolved tier is 720p.

When to Use

Prompt Guide

Lead with the main subject or source asset, then describe the intended action or transformation, environment, composition, camera or vocal delivery, lighting and mood. Keep instructions concrete and compatible; use the route’s explicit fields for duration, resolution, ratio, quality, voice, or reproducibility instead of burying those settings in prose.

{
  "prompt": "A cinematic product reveal with deliberate subject motion, coherent lighting, and a slow camera push.",
  "duration": 6,
  "video": "https://example.com/input.mp4"
}

Technical Specs

Related Models