Kling 3 vs Veo 3.1 Fast

Updated 2026-08-21

Kling 3 and Veo 3.1 Fast are both available on Pixel Engine. This page compares what they actually cost and what they can do, generated from the live catalogue rather than written by hand.

Specifications side by side

	Kling 3	Veo 3.1 Fast
Type	video	video
Credits (base)	12	12
Cost per generation	$0.80–$1.20	$0.80–$1.20
Cost per second of video	$0.16–$0.24	$0.20–$0.30
Durations (s)	5,10	4s,6s,8s
Resolutions	—	720p,1080p
Aspect ratios	16:9,9:16,1:1	16:9,9:16
Image to video	Yes	Yes
Start + end frame	No	No
Native audio	Yes	Yes
Requires an input image	No	No
Negative prompt	Yes	Yes
Seed control (repeatable results)	No	No
Multiple reference images	No	No
Served by	fal	fal

Cost by clip length

Length	Kling 3	Veo 3.1 Fast
4ss	—	12 credits
5s	12 credits	—
6ss	—	18 credits
8ss	—	24 credits
10s	24 credits	—

Which should you use?

Both models price identically per generation on current plan rates, so the choice comes down to the capability differences listed above.

The concrete differences are:

Cost per second of video: Kling 3 $0.16–$0.24, Veo 3.1 Fast $0.20–$0.30
Durations (s): Kling 3 5,10, Veo 3.1 Fast 4s,6s,8s
Resolutions: Kling 3 —, Veo 3.1 Fast 720p,1080p
Aspect ratios: Kling 3 16:9,9:16,1:1, Veo 3.1 Fast 16:9,9:16

Run the same prompt on both

Both models are on one account with shared credits, so you can generate the identical prompt on each and compare the real output instead of taking a table's word for it.

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Common questions

Can I use both Kling 3 and Veo 3.1 Fast on one account?

Yes. Both are available on Pixel Engine from the same credit balance, so you can switch between them without a second subscription.

Which one generates audio?

Kling 3 generates native audio with the video. The other produces silent video that you would need to score separately.

Can I animate an existing image?

Both models support image-to-video, so you can supply a still frame as the starting point rather than generating from text alone.