Kling 3.0 vs Kling 4.0: What Changed?

Kling 4.0 changed three things compared with Kling 3.0 Omni: one generation can now run up to 30 seconds instead of 15, it adds a 21:9 widescreen frame, and it drops the 4K tier (Kling 4.0 tops out at 1080p). Both generate native audio in the same pass. On VdoBloom a 5-second 720p clip costs 57 credits on Kling 4.0 and 40 on Kling 3.0 Omni; a 10-second clip is 114 versus 80. Pick Kling 4.0 for long continuous shots, and stay on Kling 3.0 Omni for short clips, 4K, or any-second lengths between 3 and 15.

Disclosure: VdoBloom is our product. Both models run on VdoBloom, so this comparison uses our own settings and credit prices. We have not run a formal quality test, and we do not report scores we did not measure.

Quick facts

• Kling 4.0 launch: Kuaishou released it on 15 October 2026.
• Longest clip: 30 seconds on Kling 4.0, 15 seconds on Kling 3.0 Omni.
• Best resolution: 1080p on Kling 4.0, 4K on Kling 3.0 Omni.
• Audio: native audio on both, always on and included in the price.
• Per-second price on VdoBloom: Kling 4.0 is 11.4 credits at 720p and 17 at 1080p. Kling 3.0 Omni is 8 at 720p, 10.8 at 1080p and 26.8 at 4K.
• Free start: 10 free credits on signup. No subscription needed, and one-time pack credits never expire.

Kling 3.0 vs Kling 4.0: what changed?

Spec on VdoBloom	Kling 3.0 Omni	Kling 4.0
Modes	Text-to-video and image-to-video	Text-to-video and image-to-video
Clip length	Any whole second from 3 to 15	3, 5, 8, 10, 12, 15, 20, 25 or 30 seconds
Resolution	720p, 1080p, 4K	720p, 1080p
Aspect ratio (text start)	16:9, 9:16, 1:1	16:9, 9:16, 1:1, 21:9
Aspect ratio (photo start)	Follows your photo	Follows your photo
Audio	Native, always on	Native, always on
Shot mode	Single shot	Single shot
Cheapest render	24 credits (3 s, 720p)	35 credits (3 s, 720p)

The headline change is length. With Kling 3.0 Omni, anything past 15 seconds means generating two clips and joining them, and the cut shows. Kling 4.0 can hold one take for up to 30 seconds, which suits a walk-and-talk, a slow reveal or an aerial drift that needs time to play out.

The trade is resolution. Kling 3.0 Omni still has a 4K tier and Kling 4.0 does not. If your clip is short and the detail matters, for example a hero product shot or a close-up on a face, 3.0 Omni at 4K gives you more pixels than any Kling 4.0 setting.

VdoBloom also runs the plain Kling 3.0 model. It is silent and costs less (28 credits for 5 seconds at 720p), which makes it the budget pick for b-roll you will put music under anyway.

How much do Kling 3.0 and Kling 4.0 cost?

Both are billed per second of output, and the exact number shows on the Generate button before you spend anything. Failed jobs are refunded automatically. Prices below are VdoBloom credits.

Length	Kling 3.0 Omni 720p	Kling 3.0 Omni 1080p	Kling 3.0 Omni 4K	Kling 4.0 720p	Kling 4.0 1080p
3 s	24	33	81	35	51
5 s	40	54	134	57	85
10 s	80	108	268	114	170
15 s	120	162	402	171	255
20 s	Not available	Not available	Not available	228	340
30 s	Not available	Not available	Not available	342	510

At the same length and resolution, Kling 4.0 costs more per second than Kling 3.0 Omni. So the newer model is worth it when you use what is new, the longer take or the 21:9 frame. For a 5-second clip that 3.0 Omni can already make, the older model does the same job for fewer credits.

Motion and faces

Length changes how motion behaves. In a 5-second clip, the model has to fit the whole action into a few beats, so fast moves can feel rushed. A 20- or 30-second Kling 4.0 take gives a gesture, a turn or a camera move room to finish naturally. It also gives the model more time to drift, so faces and clothing need a clear first frame and a simple prompt to stay stable across the take.

For faces, the start image does most of the work. On both models in image-to-video mode, your photo is the first frame and the clip keeps its shape. Practical tips that apply to either:

• Start from a sharp, evenly lit photo with the face large in frame.
• Ask for small, natural motion first: a turn to camera, a blink, a smile. Big actions are where identity slips.
• For a long Kling 4.0 take, keep the person doing one continuous thing (walking, talking, cooking) rather than a chain of unrelated actions.
• If the face matters most and the clip is short, render on Kling 3.0 Omni at 1080p or 4K.

Prompt adherence: how to write for each model

Both models read plain shot-list prompts best: subject, action, camera, light, style. The difference is how much story one prompt can carry.

• Kling 3.0 Omni (3 to 15 s): one beat per clip. "A chef flips a pancake in a sunny kitchen. The camera slowly pushes in. Warm morning light."
• Kling 4.0 (up to 30 s): a short sequence in order. "A chef cracks two eggs into a bowl, whisks them, then pours the mix into a hot pan. The camera tracks slowly from left to right the whole time. Warm morning light, steam rising."

Write the events in the order they should happen, and name one camera move for the whole clip. Neither model on VdoBloom exposes a multi-shot storyboard mode, so "cut to" instructions will not create edited cuts. For camera wording, see camera movement prompts for AI video.

Since both models generate audio, you can describe sound too: "the sizzle of the pan", "rain on the window", "a quiet café murmur". Keep spoken lines short.

When is Kling 3.0 still the right pick?

• You need 4K. Only Kling 3.0 Omni has a 4K tier.
• The clip is 15 seconds or less. Kling 3.0 Omni is cheaper at every matching length and resolution.
• You need an odd length. Kling 3.0 Omni renders any whole second from 3 to 15, such as 7 or 11 seconds. Kling 4.0 has fixed steps.
• You want silent b-roll. Plain Kling 3.0 skips audio and starts at 28 credits for 5 seconds.

When should you use Kling 4.0?

• One continuous shot of 16 to 30 seconds with no visible stitch.
• Cinematic 21:9 establishing shots for trailers and intros.
• Scenes where a single action needs time, such as a slow reveal of a room or product.

How to try both on VdoBloom

1. Open Text to Video or Image to Video.
2. Pick Kling 3.0 Omni, write your prompt, and set 5 seconds at 720p (40 credits).
3. Switch the model to Kling 4.0 with the same prompt (57 credits at 5 seconds, 720p) and compare.
4. Once you know which one fits, render the final length and resolution.

Model pages with full specs: Kling 4.0 Text-to-Video, Kling 4.0 Image-to-Video, Kling 3.0 Omni Text-to-Video and Kling 3.0 Omni Image-to-Video. Our Kling 4.0 guide covers prompt templates in more depth.

Frequently asked questions

Kling 3.0 vs Kling 4.0: what changed?

Kling 4.0 doubles the longest single clip from 15 to 30 seconds and adds 21:9. It loses the 4K tier that Kling 3.0 Omni has, so it tops out at 1080p. Both make native audio, and both work from text or a photo.

Is Kling 4.0 better than Kling 3.0?

It is better for long takes. For short clips, 4K output or tight budgets, Kling 3.0 Omni is often the more sensible choice. Run the same prompt on both at 5 seconds and 720p (97 credits in total) and judge the result yourself.

Does Kling 4.0 support 4K?

Not on VdoBloom. Kling 4.0 offers 720p and 1080p. For 4K, use Kling 3.0 Omni (134 credits for 5 seconds), or upscale a 1080p clip with the AI Video Upscaler.

Can I add a last frame or reference images to Kling 4.0?

Not in VdoBloom's Kling 4.0 tool today. Image-to-video takes one photo as the first frame plus your prompt.

Can I try Kling 4.0 for free?

The 10 free signup credits do not cover a Kling 4.0 clip, which starts at 35 credits for 3 seconds at 720p. You can buy a one-time credit pack with no subscription, and those credits never expire.