Seedance 2.0 Fast vs Veo 3.1 Fast: which cheap engine to draft on

Two engines with Fast in the name

Both of these engines are sold as the quick, cheap option. Seedance 2.0 Fast is ByteDance's lighter version of Seedance 2.0. Veo 3.1 Fast is Google's quicker tier of Veo 3.1. People tend to reach for whichever one their tool shows first and use it for drafts.

The comparisons on page one of Google rank them on quality votes and speed. Melies lists the length limits, evolink says Veo is usually the faster of the two, and a few pages quote leaderboard scores that disagree with each other. What none of them does is put the same shot on both engines and say what it costs you. On our credit meter the answer is not the one the names suggest: for a silent 720p clip, Veo 3.1 Fast is the cheaper engine per second. Seedance 2.0 Fast wins on other things, and this page says which.

The two engines, as our studio runs them

	Seedance 2.0 Fast	Veo 3.1 Fast
maker	ByteDance	Google
resolutions	480p, 720p	720p, 1080p
lengths	any whole second from 4 to 15	4, 6 or 8 seconds only
reference images per scene	9	3
how the prompt names a reference	@Image1, @Image2	"image 1" in plain words
length with references	whatever you ask for	always 8 seconds
sound	always on, same price	voiced or silent, silent is cheaper
credits per second	25 at 480p, 50 at 720p	30 voiced, 20 silent, at 720p and 1080p alike

Every figure in that table is from the engine catalogue our studio prices from. The provider prices that third-party sites quote for these two engines differ from site to site, so we do not use them here.

Price: the same shot on both

Here is what the same length costs on each, in credits:

length	Fast, 480p	Fast, 720p	Veo Fast, silent	Veo Fast, voiced
4 s	100	200	80	120
6 s	150	300	120	180
8 s	200	400	160	240
10 s	250	500	not served	not served
12 s	300	600	not served	not served
15 s	375	750	not served	not served

Three things stand out.

Silent Veo 3.1 Fast is the cheapest second in this comparison. At 20 credits a second it undercuts Seedance 2.0 Fast at 480p, which is 25, and it does so at 720p. If you are drafting a silent shot of 8 seconds or less, Veo is the cheaper draft and the sharper one.

Voiced, it is close at 480p and Veo wins at 720p. Veo voiced is 30 a second at either resolution. Seedance 2.0 Fast includes sound in every render and charges 25 at 480p and 50 at 720p. So a voiced 720p draft costs 240 on Veo against 400 on Fast for 8 seconds.

Veo 1080p costs the same as its 720p. Seedance 2.0 Fast does not go to 1080p at all. If a draft might become the final, Veo can render it at 1080p for no extra credits.

One more comparison worth knowing: at 720p, plain Seedance 2.0 is 45 credits a second, five less than 2.0 Fast. Fast is not the cheaper choice at 720p on our shelf. At 480p, 2.0 is 22 against Fast's 25.

Where Seedance 2.0 Fast wins

Price per second leaves out what each engine can render. Seedance 2.0 Fast is the better pick when the shot needs any of the following.

Shots longer than 8 seconds. Veo 3.1 Fast stops at 8. A 12-second shot on Veo is two clips cut together, which is a cut you did not plan for. Seedance 2.0 Fast renders 12 or 15 seconds in one generation, so the motion runs unbroken.

Lengths between Veo's three. Veo serves 4, 6 and 8 and nothing else. If the beat is 5 seconds, Veo quotes 6. Seedance 2.0 Fast bills the 5 you asked for.

More than three references. This is the big one for anyone making series with a cast. Veo 3.1 Fast takes three reference images per scene. Seedance 2.0 Fast takes nine. Two characters, a location plate and a prop is four references, already past Veo's limit.

The Veo eight-second pin

Veo 3.1 Fast has a rule that changes the price the moment you add a character: a render with reference images is always 8 seconds, whatever length you set. A 4-second shot of your saved character on Veo bills 8 seconds:

4 s shot of a saved character	credits
Veo 3.1 Fast, silent (renders 8 s)	160
Veo 3.1 Fast, voiced (renders 8 s)	240
Seedance 2.0 Fast, 480p (renders 4 s)	100
Seedance 2.0 Fast, 720p (renders 4 s)	200

So the silent-Veo saving holds for shots of 8 seconds and for shots without references. For short character shots, Seedance 2.0 Fast at 480p is the cheaper draft, because Veo makes you pay for 8 seconds you did not want. Our studio shows the pinned price on the render button before you press it.

Sound

Veo 3.1 Fast lets you turn sound off, and the price drops by a third: 20 credits a second instead of 30. That is useful for drafts, where you are checking motion and framing and do not need the audio yet.

Seedance 2.0 Fast always renders with sound and charges the same either way. You cannot save credits on a silent draft there, so if the draft is about motion only, that is a point for Veo.

Speed

We have not timed the two against each other on our own renders, so we will not give you a number. Evolink's comparison says Veo is usually the quicker of the two.

Which one we draft on

Our rule of thumb, shot by shot:

the shot	draft on
silent, 8 s or less, no saved character	Veo 3.1 Fast
voiced at 720p, 8 s or less	Veo 3.1 Fast
4 to 6 s with a saved character	Seedance 2.0 Fast at 480p
9 to 15 s in one take	Seedance 2.0 Fast
four or more references	Seedance 2.0 Fast
might become the final at 1080p	Veo 3.1 Fast

Then the draft decides the final. If the draft is going to Seedance 2.5 or Kling O3 Pro for the real render, draft on the engine whose limits are closest to the final one, so the draft tells you something about the final. Our guide to the two-pass budget, drafting at 480p and finishing at 1080p runs that math across a whole story.

A worked example

A 30-second episode in five 6-second shots, two characters, drafted once before the final:

draft plan	how	credits
all on Veo 3.1 Fast, silent	references pin each shot to 8 s, 5 x 160	800
all on Seedance 2.0 Fast, 480p	5 x 150	750
mixed: three character shots on Fast 480p, two wide shots with no references on Veo silent	3 x 150 plus 2 x 120	690

The mix wins because it puts each shot on the engine that is cheapest for that kind of shot. The difference is small on one episode. Over a twelve-episode season it is 1,320 credits against Veo-only drafts.

To try both on the same shot, open the studio, pick your saved character, and render the same 4-second prompt on each engine. Compare what came back with what the render button quoted.

FAQ

Is Seedance 2.0 Fast or Veo 3.1 Fast cheaper?

On ReelDouble, silent Veo 3.1 Fast is cheaper per second, at 20 credits against 25 for Seedance 2.0 Fast at 480p. But Veo bills every render with reference images as 8 seconds, so a short shot of a saved character is cheaper on Seedance 2.0 Fast at 480p.

How long can Seedance 2.0 Fast and Veo 3.1 Fast videos be?

Seedance 2.0 Fast renders any whole second from 4 to 15. Veo 3.1 Fast renders only 4, 6 or 8 seconds, and always 8 when reference images are used. For a 12 or 15 second shot in one take, Seedance 2.0 Fast is the one that can do it.

How many reference images do Seedance 2.0 Fast and Veo 3.1 Fast take?

Seedance 2.0 Fast takes nine reference images per scene, named @Image1, @Image2 and so on. Veo 3.1 Fast takes three, called image 1 to image 3 in plain words. Two characters, a location and a prop need Seedance 2.0 Fast.

Does Veo 3.1 Fast cost more at 1080p?

Not on ReelDouble. Veo 3.1 Fast costs 30 credits a second voiced and 20 silent at both 720p and 1080p. Seedance 2.0 Fast stops at 720p.

Which is better for drafting AI video, Seedance 2.0 Fast or Veo 3.1 Fast?

Use Veo 3.1 Fast for silent or voiced drafts of 8 seconds or less without references. Use Seedance 2.0 Fast at 480p for short shots of a saved character, for shots over 8 seconds, and for scenes with more than three references.