Vidu Q4 Preview 4K costs 8.7x the 540p price: 78 credits vs 9

On Vidu's platform, Q4 Preview at 4K costs 78 credits per second against 9 credits at 540p, which is 8.67 times as much. The launch release gives two USD prices that match this ratio exactly: $0.045 per second at 540P and $0.39 per second at 4K. 78 / 9 = 8.67 and $0.39 / $0.045 = 8.67, so Vidu's USD price works out to half a cent per credit at both ends.

What is published and what is derived

Vidu's pricing page lists 1 credit as 0.03125 RMB, with Q4 Preview billed for 3 to 16 second clips on image-to-video and reference-to-video. The GlobeNewswire launch release states $0.045 per second for 540P up to $0.39 per second for 4K. The last column of the table is our arithmetic on those two published points (credits x $0.005), not a price Vidu printed for the middle tiers, so confirm 720p, 1080p and 2K in USD with Vidu before you quote them.

The same release says image-to-video and reference-to-video are 30 percent off through November 30. At 4K that takes $0.39 to $0.273 per second, and a 16-second 4K clip from $6.24 to $4.368. At 540p a 16-second clip goes from $0.72 to $0.504.

Is 4K worth 8.7 times the price?

For a draft or a social cut shown on a phone, rarely. Because the multiple is steep, draft at 540p and promote only the selected clip to 4K. Ten 540p drafts of 10 seconds cost 10 x 10 x $0.045 = $4.50 at the undiscounted rate, and one 10-second 4K final costs $3.90. The drafts cost more than the final in that plan, which is the right order of magnitude for a review step.

What Sume lists

Sume does not list Vidu in its catalog, so there is no Vidu id to call through Sume. The only 4K row Sume lists is gemini-omni-flash-1.1 at $0.375 per second for 3 to 10 seconds in 16:9 or 9:16, so a 10-second 4K clip is $3.75. That compares with $3.90 for 10 seconds of Vidu Q4 4K at the full USD price, and $2.73 with the 30 percent promotion on image-to-video. The two models differ in inputs and outputs; the comparison is price only. For other tiers, Sume lists wan-3.0 at $0.125 per second at 720p and $0.25 at 1080p.

A reference table for producers

Keep three numbers in a budget sheet: 9 credits per second for drafts, 78 for 4K finals, and 0.03125 RMB per credit. A 5-second 540p draft is 45 credits, or 1.41 RMB (45 x 0.03125). A 5-second 4K final is 390 credits, or 12.19 RMB. The ratio between them stays 8.67 whatever the currency, which is why the 540p to 4K step is the one to plan around.