CheaperGen

Video model comparison

Kling 3.0 vs Kling 4.0

Kuaishou's Kling 3.0 and Kuaishou's Kling 4.0, side by side: price per second, resolution, clip length, audio and references — and when to choose which. Both run on one CheaperGen API key.

Kuaishou
Up to −9%

Kling3.0

Kling 3.0

Kling's flagship video model — cinematic motion, native audio, up to 15 s

from

$0.0773/s

Kuaishou
Up to −5%

Kling4.0

Kling 4.0

Kling's newest video model — up to 30 s with stereo sound on every clip

from

$0.1486/s

Price

Kling 3.0 vs Kling 4.0: price per second

Live prices at the tiers both models offer. Official list prices are on each model's pricing page.

Kling 3.0 and Kling 4.0 prices at shared tiers
TierKling 3.0Kling 4.0Per clipCheaper
720p$0.0773/s$0.1486/s$0.39 · $0.75
5 s each
Kling 3.0 −48%
1080p$0.1031/s$0.2226/s$0.52 · $1.12
5 s each
Kling 3.0 −54%
Kling 3.0 pricing →Cheapest Kling 3.0 API →Kling 4.0 pricing →Cheapest Kling 4.0 API →

Specs

Side-by-side specifications

From each model's API parameters in our catalog.

Kling 3.0 vs Kling 4.0 specifications
SpecKling 3.0Kling 4.0
DeveloperKuaishouKuaishou
ReleasedFeb 25, 2026Oct 26, 2026
TasksText to video, Image to videoText to video, Image to video, Reference to video
Resolutions720p · 1080p · 4K720p · 1080p
Clip length3–15 s3–30 s
AudioOptional, billed at a higher rate—
Image-to-videoFirst + last frameFirst + last frame
Reference inputs—Up to 10 images and 5 videos
Aspect ratios3 (16:9, 9:16, 1:1)4 (16:9, 9:16, 1:1, 21:9)
Starting price$0.0773/s (720p)$0.1486/s (720p)
Below official priceup to 9%up to 5%

Verdict

When to choose which

Each point below comes from the price and spec data above.

Choose Kling 3.0 for

  • Lower price: $0.0773/s vs $0.1486/s at 720p (48% less).
  • Higher maximum resolution: 4K vs 1080p.
  • Can generate native audio (billed at a higher rate).

Kling 3.0 at a glance

  • Up to 4K — 720p, 1080p and native 4K
  • 3–15 seconds — Pay per second
  • Native audio — Optional synchronized sound
  • Frames — First & last frame control

Choose Kling 4.0 for

  • Longer clips: up to 30 s vs 15 s.
  • More reference inputs: up to 10 images and 5 videos.
  • More aspect ratios: 4 vs 3.
  • Supports reference to video.
  • Newer model (released October 26, 2026).

Kling 4.0 at a glance

  • Up to 30 seconds — Pay per second
  • Stereo audio — Included on every clip
  • 720p / 1080p — 16:9, 9:16, 1:1 and 21:9
  • References — Images, videos, first & last frame

Try both with the same prompt

Same API key and balance; only the endpoint changes. Failed generations are refunded.

POST /api/v1/run/kuaishou/kling-3.0/text-to-video
POST /api/v1/run/kuaishou/kling-4.0/text-to-video
Kling 3.0 in Studio Kling 4.0 in Studio

FAQ

Kling 3.0 vs Kling 4.0 questions

Kling 3.0 is cheaper at 2 of 2 shared tiers. 720p: Kling 3.0 $0.0773/s, Kling 4.0 $0.1486/s; 1080p: Kling 3.0 $0.1031/s, Kling 4.0 $0.2226/s. Prices are live and billed per second.

Kling 3.0: 720p, 1080p, 4K, 3–15 s per clip. Kling 4.0: 720p, 1080p, 3–30 s per clip.

Kling 3.0: Optional, billed at a higher rate. Kling 4.0: no audio option listed.

Yes. Both run through the same CheaperGen API and balance: POST /v1/run/{endpoint} with the model's endpoint id, then poll or receive a webhook. Switching models means changing the endpoint and its input fields — no new account or SDK.

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All comparisons →All AI video APIs →Cheapest video APIs →

Kling 3.0 is developed by Kuaishou; Kling 4.0 by Kuaishou. CheaperGen provides API access to both and does not own either model. Trademarks belong to their respective owners.