1,000 SKU catalog of 6 s Grok Imagine loops: $75 plus image prep

At $0.0125 per second on Sume, a 6-second Grok Imagine Video loop costs $0.075, so 1,000 SKUs cost $75.00 for the motion step. That is the cheapest per-second video row in the Sume catalog I priced on 2026-10-05, but the model has constraints that decide whether it suits a product catalog: it is image-to-video only, the image is required, and there is no end frame, no audio and no aspect_ratio field. Output follows the shape of the image you send.

The constraints that matter for a store

Because the output follows the image, you must supply every photo already at 9:16 if you want a vertical ad. Sume's own videos docs and catalog notes list the limits; the catalog also warns that list prices are subject to change, so check the live catalog before funding a thousand-clip run. Grok supports 4 to 15 s clips at 480p or 720p, which covers a short ad but not 1080p.

Image prep is the real extra line. An image edit with gpt-image-2.5 and one reference costs $0.0835 at high quality or $0.0094 at low (image docs), so prepared 9:16 photos add between $9.40 and $83.50 per 1,000 SKUs.

Submitting 1,000 jobs

Concurrency is plan-only and top-ups do not raise it, per the generation admission docs. Accepted job capacity is 6 on Free, 24 on Pro, 48 on Startup and 120 on Scale; past it, a submit fails with 429 queue_full. So 1,000 jobs go in waves: nine waves on Scale, 21 on Startup and 42 on Pro.

Use a stable Idempotency-Key per SKU so a retried wave never bills a clip twice, and wait for a wave to drain before the next.

• No audio: add a music bed or voice-over in Timeline if the ad needs sound.
• No end frame: do not plan a seamless loop on this model.
• Cost is for motion only; add $0.30 for captions and a Timeline end card if you use them.

For xAI's own price and how it compares to Sume's rate, see the Grok Imagine per-second comparison; for blending cheap and premium rows, see the A/B/C tiered budget.