Kling 4.0 Review: Quality, Speed and What a Clip Costs

Kling 4.0, from Kuaishou, is the latest Kling model on DER. It turns a text prompt or a photo into a clip of 3 to 30 seconds at 720p or 1080p, with sound generated in the same pass. In our six tests it kept fast body motion steady, spelled the word on the mug correctly and spoke the barista's line word for word; for one continuous shot, say so in the prompt, because Kling 4.0 sometimes cuts to a close-up on its own. A 5-second 720p clip cost 600 credits and came back in about 4 minutes.

What Kling 4.0 does on DER

• Three ways to start: text to video, image to video, and first and last frames.
• Length: any whole number of seconds from 3 to 30.
• Resolution: 720p or 1080p.
• Sound: every clip comes with sound, made together with the picture.
• Price: by the second, from 360 credits for a 3-second clip (≈ $3.60). The Studio shows the exact credits before you start, and a clip that fails costs nothing.
• Access: Kling 4.0 is a Pro model on DER. Tiers come from your total top-ups; there is no subscription.

We ran every clip at 5 seconds, 720p and 16:9, so the numbers below compare like with like. The full setup is in the How we tested box above.

Text to video: five prompts

Each prompt checks one thing video models often find hard: fast body motion, a character speaking on camera, a smooth camera move over a landscape, readable text on an object, and a stylized animated look.

1. Fast motion (the breakdance spin). The dancer stayed in one piece through fast footwork around a hand planted in the puddles, while the camera circled and the neon reflections held steady. Water splashed where the hands hit the street.
2. Speech and lip sync (the barista). The barista slid a paper cup across the counter in a wide shot, then the clip cut to a close-up for the line, spoken word for word: “Your oat latte is ready. Careful, it is hot.” The mouth moves in time with the words.
3. Landscape and camera move (the drone shot). A steady forward glide over the pines toward a river winding through a misty valley, with sun rays in the fog. The hills and the river kept their shape for the whole move.
4. Text on an object (the MORNING mug). MORNING came out spelled right in bold black letters, as asked, and stayed right while the camera moved around the mug and the handle came into view.
5. Stylized animation (the robot). The robot watered the plant from a small can, then the clip cut to a close-up of the water and to a wide shot where a bright new leaf has appeared. In the first shot, a large blurred copy of the robot shows in the window behind it.

Photo to video

For the image-to-video test we made a still of a red fox in snow with Seedream 5.0 Pro on DER, then asked Kling 4.0 to bring it to life.

Photo to video

The input is a still we generated with Seedream 5.0 Pro. 5 seconds, 720p, with sound.

Photo to video: the fox from the still image

PromptThe fox turns its head toward the camera, blinks, then stands up and trots away into the birch forest as snowflakes keep falling. Soft wind and the crunch of snow.

Input

• 

  Kling 4.0

  5 s · 720p

  600 credits · 5 min 17 s

Test data: Photo to video (tested November 4, 2026)

Test	Model	Settings	Credits	Run time	Result
Photo to video: the fox from the still image	Kling 4.0	5 s · 720p	600 credits	5 min 17 s	Done

The fox kept the look of the still, from its coat and face to the birch trees behind it. It looked at the camera, got up and trotted off to the left until it left the frame, so the clip ends on empty snow rather than with the fox heading into the trees.

Kling 4.0 or Kling 3.0?

The first three prompts also ran on Kling 3.0, at the same length and resolution and with sound turned on, so you can see what changed between versions.

Kling 4.0 followed the prompts more closely. On the dance, it kept the dancer up on hands and feet through fast footwork, while Kling 3.0 played it as a spin on the ground. Both baristas said the line word for word, but Kling 4.0 delivered all of it in a close-up, while Kling 3.0's barista spoke most of it with the face still out of frame. On the drone shot, Kling 3.0 framed the sunrise well, but its clip came back almost silent even with sound turned on.

On price, Kling 3.0 starts from 32 credits for a 3-second clip (≈ $0.32) and Kling 4.0 starts from 360 credits for a 3-second clip (≈ $3.60). In our runs a 5-second 720p clip with sound cost 83 credits on Kling 3.0 and 600 on Kling 4.0.

Choose Kling 4.0 when a character has to speak on camera or the clip has to match a detailed prompt. Kling 3.0 cost 83 credits for the same 5-second 720p clip with sound, about a seventh of Kling 4.0's 600, which makes it a good way to try out an idea first.

What a Kling 4.0 clip costs

These are the credits DER charged for each clip in this test:

Kling 4.0 is priced per second of video, so a longer clip costs more. For 1080p or any other length, the Studio shows the exact credits before you start. To compare Kling 4.0 with every other video model on DER, see pricing.

How to get better results with Kling 4.0

• Ask for one continuous shot if you want no cuts. Kling 4.0 cut to a close-up on its own in the barista and robot clips.
• Put the spoken line in quotes. Our barista said the quoted line word for word.
• Put on-screen words in quotes and describe the lettering. “MORNING” in bold black letters came out exactly as written.
• Name the camera move in plain words. “Aerial shot gliding forward” and “the camera slowly orbits” both came out as described.
• In image to video, give the direction from the camera's point of view, such as “away from the camera, into the trees”. Our fox went off to the side.

Try Kling 4.0

Open the Kling 4.0 model page for its settings and starting price, or go straight to text to video or image to video. The Kling family page lists every Kling version on DER.