Veo 3.1 Fast vs Kling v2.6: the cheaper way to get a clip with sound
veo 3.1 fast vs kling 2.6 price with audio
Veo 3.1 Fast is cheaper. It costs 1,500 credits for an 8-second clip with audio included; Kling v2.6 costs 3,500 credits for 5 seconds. That is 2.33 times the credits for three fewer seconds, or 187.5 credits per second of finished audio video against 700, a 3.73x gap. On the 100,000-credit pack: $0.60 versus $1.40 per clip.
How this works
The two prices, side by side
For both models the quoted price already covers audio. Veo 3.1 Fast: 1,500 credits, 8 seconds, audio included. Kling v2.6: 3,500 credits, 5 seconds, audio included. Per generation Kling v2.6 costs 2,000 credits more, which is 2.33 times as much. Because the clips are not the same length, the per-generation number understates the gap. Divide credits by seconds and Veo 3.1 Fast delivers one second of audio-bearing video for 187.5 credits, Kling v2.6 for 700. That is 512.5 credits more per second, a factor of 3.73. If your target length is 8 seconds, one Veo 3.1 Fast run covers it. A Kling v2.6 generation is priced at 5 seconds, so two runs give you 10 seconds of material for 7,000 credits. Nothing in the pricing data says how cleanly two separate 5-second clips join, so treat that second run as raw footage cost, not a finished 8-second shot.
What it costs in actual dollars
On Doitong, credits are sold in three packs, and the pack you buy changes the answer by roughly 2x. 30,000 credits cost $19.99 (about $0.67 per 1,000), 100,000 cost $39.99 (about $0.40 per 1,000), and 300,000 cost $99.99 (about $0.33 per 1,000). One Veo 3.1 Fast clip therefore runs $1.00, $0.60 or $0.50 depending on the pack. One Kling v2.6 clip runs $2.33, $1.40 or $1.17. Expressed per second of audio video, Veo 3.1 Fast is $0.125, $0.075 or $0.063, and Kling v2.6 is $0.466, $0.280 or $0.234. The practical read: on the middle pack, ten Veo 3.1 Fast clips (80 seconds of material with sound) cost $6.00. Ten Kling v2.6 clips (50 seconds) cost $14.00. If you expect to discard takes before you get a usable one, that ratio compounds, so cheap drafts before an expensive final pass are worth the extra step.
Where the two sit among every audio-included model
Six models in the price list carry audio inside the quoted price. Ranked by credits per second of finished video: Veo 3.1 Fast 187.5, Veo 3.1 Pro 250, Hailuo H3 675, Kling v2.6 700, Seedance 2 Fast 1,240, Seedance 2.0 1,550. Two things fall out of that list. First, even the more expensive Veo tier undercuts Kling v2.6: Veo 3.1 Pro is 2,000 credits for 8 seconds, so it is both 1,500 credits cheaper per generation and 450 credits cheaper per second. In dollars, Veo 3.1 Pro is $1.33, $0.80 or $0.67 per clip against Kling v2.6's $2.33, $1.40 or $1.17. If you picked Kling v2.6 on budget grounds, the budget argument does not hold against either Veo 3.1 tier. Second, Hailuo H3 sits close to Kling v2.6 per second (675 against 700) at 3,375 credits for a 5-second 768p clip, so it is a like-for-like alternative on cost. Seedance 2 Fast (6,200 credits) and Seedance 2.0 (7,750) are the expensive end of the audio ladder, at $4.13/$2.48/$2.07 and $5.16/$3.10/$2.58 per clip across the three packs.
The numbers, in full
| Veo 3.1 Fast | Kling v2.6 | |
|---|---|---|
| Credits per generation | 1,500 | 3,500 |
| Clip length | 8 s | 5 s |
| Audio | included in price | included in price |
| Credits per second of video | 187.5 | 700 |
| Cost on 30,000 pack ($19.99) | $1.00 | $2.33 |
| Cost on 100,000 pack ($39.99) | $0.60 | $1.40 |
| Cost on 300,000 pack ($99.99) | $0.50 | $1.17 |
| Cost per second, 100,000 pack | $0.075 | $0.280 |
| Gap per generation | baseline | 2.33x more credits |
| Gap per second | baseline | 3.73x more credits |
| Model | Credits | Length | Credits per second | Clip price (30k / 100k / 300k pack) |
|---|---|---|---|---|
| Veo 3.1 Fast | 1,500 | 8 s | 187.5 | $1.00 / $0.60 / $0.50 |
| Veo 3.1 Pro | 2,000 | 8 s | 250 | $1.33 / $0.80 / $0.67 |
| Hailuo H3 | 3,375 | 5 s, 768p | 675 | $2.25 / $1.35 / $1.12 |
| Kling v2.6 | 3,500 | 5 s | 700 | $2.33 / $1.40 / $1.17 |
| Seedance 2 Fast | 6,200 | 5 s, 720p | 1,240 | $4.13 / $2.48 / $2.07 |
| Seedance 2.0 | 7,750 | 5 s, 720p | 1,550 | $5.16 / $3.10 / $2.58 |
Credit packs: 30,000 for $19.99, 100,000 for $39.99, 300,000 for $99.99. Prices above are per generation at each pack rate.
The detail
If your clip came out silent, check this
Audio is not a universal freebie. Some models are sold in two variants, one with audio and one without, and the silent variant costs close to half as much. Seedance 1.5 and Kling V3 both work this way, so a generation that came back mute is worth checking against which variant was selected. The models whose quoted price already covers sound are Veo 3.1 Fast, Veo 3.1 Pro, Kling v2.6, Hailuo H3, Seedance 2 Fast and Seedance 2.0. Anything outside that group is worth checking before you plan a shot around dialogue or ambience. A related question, "why does my video stop at five seconds", has the same shape: durations are fixed per model and they differ. Veo 3.1 runs 8 seconds, most other models 5, Hailuo 2.3 is 6, and Grok Video is billed by the second (350 credits per second at 480p, 450 at 720p). The length is set by the model you picked, and it is the duration that model's price covers.
What this comparison deliberately does not tell you
This page compares two things only: price and duration. It says nothing about image quality, motion coherence, prompt adherence or how convincing the generated audio sounds, because those are not numbers that can be quoted from a price list. It also does not state an output resolution for Veo 3.1 Fast or Kling v2.6. The listed price for both covers an 8-second and a 5-second clip with audio; no resolution is listed, so none is claimed here. Other models do carry one, for example Hailuo H3 at 768p and both Seedance 2 tiers at 720p. So the honest conclusion is narrow and useful: if the only question is which model gives you a second of sound-carrying video for fewer credits, Veo 3.1 Fast wins by 3.73x over Kling v2.6. If Kling v2.6 gives you a look you want, that is a separate decision, and you now know exactly what it costs.
Questions people ask next
Which is cheaper for a clip with sound, Veo 3.1 Fast or Kling v2.6?
Veo 3.1 Fast, by a wide margin. One generation is 1,500 credits and returns 8 seconds with audio included. Kling v2.6 is 3,500 credits and returns 5 seconds. That is 2.33 times the credits for a shorter clip, or 187.5 versus 700 credits per second of finished audio video. On the 100,000-credit pack the two clips cost $0.60 and $1.40.
How many credits does Kling v2.6 cost per generation?
Kling v2.6 costs 3,500 credits per generation, which buys a 5-second clip. That price includes audio. In dollars it is $2.33 on the 30,000-credit pack, $1.40 on the 100,000 pack and $1.17 on the 300,000 pack, which works out to $0.28 per second of video at the middle tier.
Why did my generated video come out with no sound?
Some models ship audio as a separately priced option rather than a default. Seedance 1.5 and Kling V3 each exist in an audio-off and an audio-on variant, and the silent one costs close to half as much, so a cheaper-looking run can be the muted run. Models whose quoted price already includes audio are Veo 3.1 Fast and Pro, Kling v2.6, Hailuo H3, Seedance 2 Fast and Seedance 2.0.
Is Veo 3.1 Pro still cheaper than Kling v2.6?
Yes. Veo 3.1 Pro is 2,000 credits for 8 seconds with audio included, so it is 1,500 credits cheaper per generation than Kling v2.6 and costs 250 credits per second against Kling's 700. In dollars that is $1.33 / $0.80 / $0.67 per clip across the three credit packs, against $2.33 / $1.40 / $1.17. The pricing data says nothing about which model produces the better picture.
What is the cheapest model with native audio?
Among models whose quoted price includes audio, Veo 3.1 Fast is cheapest both per generation (1,500 credits, $0.60 on the 100,000-credit pack) and per second (187.5 credits). The ladder then runs Veo 3.1 Pro at 250 credits per second, Hailuo H3 at 675, Kling v2.6 at 700, Seedance 2 Fast at 1,240 and Seedance 2.0 at 1,550. Models that sell audio as a separate option are priced differently and are not on this list.
Can I get an 8-second clip out of Kling v2.6?
A Kling v2.6 generation is priced at 5 seconds. Two runs give you 10 seconds of material for 7,000 credits, against 1,500 credits for the single 8-second Veo 3.1 Fast clip. Whether two separate 5-second clips cut together convincingly is a craft question that pricing data cannot answer, so budget the second run as raw footage rather than a guaranteed continuation.
What resolution do Veo 3.1 Fast and Kling v2.6 output?
The listed price for Veo 3.1 Fast covers an 8-second clip with audio and for Kling v2.6 a 5-second clip with audio; no output resolution is listed for either, so none is claimed here. Other models do carry one, for example Hailuo H3 at 768p and both Seedance 2 Fast and Seedance 2.0 at 720p. Check the model page before you assume a delivery format.
Should I use Seedance 2 instead if I need audio?
Only if cost is not the constraint. Seedance 2 Fast is 6,200 credits ($4.13 / $2.48 / $2.07 per clip) and Seedance 2.0 is 7,750 ($5.16 / $3.10 / $2.58), both 720p and 5 seconds with audio included, which puts them at the expensive end of the audio ladder. Seedance 2 also carries two hard limits: it takes no video input in any variant, and it works in 16:9, so vertical output is not available.
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