Grok Video Extension

Available

xAI · xai/grok-imagine-video-extension

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Tasks using this model

Video Extender

Input contract

Required inputs: video, prompt
Optional inputs: duration
Output: video (uri)
Submission: Official Replicate model endpoint (always current version)

Provider billing

$0.05 per output second

Provider-side unit, for reference only. This site charges a fixed credit tier per execution — the price shown at quoting time is the price paid.

Contract notes

Input 2–15 s (MP4, H.264/H.265/AV1), extension duration 2–10 s (schema-bounded, task schema mirrors it). Re-locked 2026-10-06 (batch D): latest version 47040d799ef0 carries a field-identical schema vs the A0 snapshot (no field/enum/default drift); schemaVersion updated in lockstep. Return shape MEASURED 2026-10-06: the provider returns the MERGED video — 5.000 s input + 6 s extension → 11.000 s / 12.4 MB output (prediction 39xvq2r7q1rmw0d11wvsz57d20). Billing and UI copy therefore use output seconds = probed source + extension (task priced per output second, source seconds resolved server-side from the receipt). Enabled 2026-10-06: batch D deployed-app E2E green (batch-d-e2e report).

Status

This model is catalogued and its contract is locked, but real executions have not passed acceptance yet. Nothing on this page should be read as a claim that it is usable today.

License: Official model; commercial terms not yet reviewed.
Last verified: 2026-10-05

Sources

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