40 menu photos to 5-second Grok clips: $2.80 on Sume

Forty dish photos animated for 5 seconds each cost $2.50 at Sume's Grok rate of $0.0125 a second, or $2.80 as billed, because every job's price is ceiled to the cent: 5 seconds is $0.0625, which becomes $0.07, and 40 x $0.07 is $2.80.

Why the Grok row fits a menu

The Grok row is image-to-video only, 4 to 15 seconds, at 480p or 720p, and you should read the row's generate_audio flag in GET /v1/videos/models before you count on sound. A menu loop is a good fit because the photo is already the shot you want and the model only has to add steam, a pour, or a slow push-in. Plan to add your own audio, for example a short music bed in the timeline.

Avoiding the rounding gap

Pick a duration that lands on a whole cent to avoid the rounding: 4 seconds ($0.05) and 8 seconds ($0.10) are exact, while 5 seconds loses 0.75 cents on every clip. Over 40 clips that is 30 cents, so it rarely matters, but it is why the unrounded and billed totals differ.

Running the batch

Each photo needs a public HTTPS URL and one submit. Send a distinct Idempotency-Key per dish, for example a hash of the file name, so a crashed loop can be restarted without paying twice for the dishes that already went through. Keep the whole batch under your wallet balance, since a submit returns 402 insufficient_credits when the balance is below the job's reserve.

• One POST /v1/videos per photo with model: "grok-imagine-video-1.5" and the photo in frame_images with frame_type: "first_frame".
• Prompt per dish: one move, one light cue, for example slow push-in, steam rising, warm window light.
• Poll or use a callback_url; a failed job releases its reserved credits where applicable.