Kling 4.0 makes clips of up to 30 seconds and adds three ways to control them: Frames (a start and end frame, or up to 10 keyframes), References (up to 10 pictures and 5 video clips) and Edit video. I planned seven shots and ran them live on Higgsfield. It was at its best when I planned the shot: it landed on the frames, walked through all four keyframes in order and got the dialogue word for word. Where it slipped was small, faint details. Here's how each mode works, the settings I used and what everything cost.
What's new in Kling 4.0?
Each of these limits was shown in the Higgsfield interface or on Higgsfield's Kling 4.0 page:
- Clips up to 30 seconds (the slider runs from 3 to 30 s). That's twice Kling 3.0's 15 seconds.
- Frames mode: a start and end frame, or up to 10 keyframes ("Up to 10 frames").
- References: up to 10 pictures and 5 video clips.
- Edit video: change one thing in a clip you already have.
- 1080p, with aspect ratios up to 21:9.
- Stereo sound. Kling 3.0 was mono.
- Prompts up to 8,000 tokens.
Where is Kling 4.0 on Higgsfield, and what does it cost?
Kling 4.0 is in Higgsfield's video model list, with Seedance 2.5 in the same list. All three modes (Frames, References and Edit video) sit at the top of the panel. The Generate button shows the credit cost before you commit.
At the launch price shown on the Generate button on Oct 25, 2026, an 8-second Kling 4.0 clip cost 8 credits (the old price, 32, was shown crossed out). A 30-second clip cost 30 credits. All my Kling 4.0 tests, retries included, came to about 170 credits at that launch price. Prices change, so check the Generate button before you run anything.
I made every start picture and reference on Higgsfield with Nano Banana Pro. If you want to follow along, here's the Kling 4.0 page on Higgsfield.
How do Kling 4.0 Frames work?
In Frames mode you give Kling the picture the clip starts on and, optionally, the picture it ends on. The prompt describes what happens in between. For my first test I wanted a sneaker that turns out to be a cake: start frame on the sneaker, end frame on the two cake halves. Settings: 8 s, 16:9, 1080p.
A hand picks up the chef's knife and slowly slices straight down through the middle of the sneaker. The two halves fall apart to reveal it was a cake all along: soft sponge layers and white frosting inside, crumbs on the board. Locked-off close-up, soft daylight, the crunch of the knife and a soft thud as the halves fall.
Result: it started right on the sneaker, sliced straight through and landed almost exactly on the end frame I planned. Slip: the knife comes back out of the cake without leaving a cut or a mark.
Can Kling 4.0 hit four keyframes in order?
Yes. I gave it four keyframes (kitten, lion cub, young lion, adult lion) in one 8-second, 16:9, 1080p clip:
The tiny kitten on the sofa grows, step by step, into a lion cub, then a young lion, then a full-grown male lion standing on the cushions. One continuous shot, locked-off camera, the room never changes. Soft purring that deepens into a low roar.
Result: every stage was there, in the right order, and the room didn't change once.
Can Kling 4.0 make a doorbell camera clip?
This one used a single start frame (8 s, 16:9, 1080p) and asked Kling to keep the look of night-vision doorbell footage:
Night-vision doorbell camera footage, fixed camera, no camera movement. The two bear cubs climb onto the trampoline and start bouncing clumsily while the mother bear stands at the edge watching. The net sways, grainy infrared noise, the timestamp stays in the corner. Quiet night ambience, springs creaking.
Result: for the first second it could pass for real doorbell footage, and the mother bear climbs over the net to join the cubs. Slip: one cub passes straight through the net instead of using the zipper opening. I ran the same test on Seedance 2.5; see Kling 4.0 vs Seedance 2.5 for how it compared.
How do Kling 4.0 References work?
References let you give Kling pictures of the people and places you want in the clip, then point to them in the prompt. I used three pictures (a reporter, a woman with a coffee and a golden-hour street) and tagged each with @ so the prompt could refer to image 1, 2 and 3. Settings: 8 s, 16:9, 1080p.
Handheld street-interview shot on the busy golden-hour sidewalk from image 3. The reporter from image 1 holds his microphone out to the woman from image 2 and asks, "What's the best advice you've ever been given?" She smiles, takes a sip of her coffee and says, "Never trust anyone who doesn't tip the barista." Natural lip sync, street noise, people walking past.
Result: both lines came out word for word with good lip sync, and both people matched their pictures. It even cut to a close-up for her answer, like a TV interview.
Can Kling 4.0 Edit video change only the background?
Edit video takes a clip you already have and changes one thing. I ran it on the street interview:
Change only the setting into a rainy city street at night with neon shop signs reflecting on the wet pavement. Keep everything else exactly the same: both people, their clothes, the microphone, the coffee cup, the dialogue and the camera movement.
Result: the street turned wet and full of neon, while both people, their clothes and every word stayed the same. An earlier attempt didn't work as well: I tried swapping the doorbell bears for other animals, and the two tiny cubs never changed. Lesson: Edit video works best when the thing you change is big and clear.
Can Kling 4.0 make a character talk?
A selfie vlog from a yeti, with a start frame, 8 s, 9:16 vertical, 1080p:
Selfie vlog, the yeti holds the camera at arm's length on the windy snowy ridge, the frame shakes slightly with his steps. He grins into the lens and says in a warm, deep voice, "Morning from the ridge, this is Bartholomew, and today we're finally going down to meet the humans." Wind noise, crunching snow.
Result: every word was right, including "Bartholomew", with one small moment where his face reshapes. This was my second try; in the first, the camera on his stick faced the viewer.
Can Kling 4.0 make a 30-second shot with no cuts?
This was the big test: one start frame, the slider at 30 s, 21:9, 1080p, and a prompt with several beats in a row:
One continuous FPV drone shot with no cuts. The drone tips over the cliff edge and dives down beside the waterfall, punches through the falling water, levels out low over the turquoise canyon river and races along it at high speed, banking through the bends, then rises over a riverside festival at dusk with lanterns and crowds just as fireworks burst overhead. Rushing wind, roaring water, then music and fireworks.
Result: no cuts, and it hit every beat, from the dive and the waterfall through to the fireworks at dusk. The drone's own propellers stay in frame the whole way. It took about 20 minutes to render, and the 30-second clip cost 30 credits at the launch price shown on the Generate button on Oct 25, 2026.
Is Kling 4.0 worth it?
If you plan your shots, yes. Kling 4.0 hit the frames, walked through all four keyframes and nailed the dialogue. Where it slipped was small, faint details: a knife that leaves no cut, a cub that passes through a net, a moment where a face reshapes. All seven prompts, ready to copy, are in Kling 4.0 prompts that worked, and every model I've tested is collected in AI video models tested.
Prefer running video models on your own GPU? My WAN 2.2 SVI guide makes long videos locally in ComfyUI.
FAQ
How long can a Kling 4.0 video be?
Up to 30 seconds. The duration slider on Higgsfield runs from 3 to 30 seconds, twice Kling 3.0's 15.
How many keyframes does Kling 4.0 support?
Up to 10 in Frames mode. In my test, four keyframes (kitten, cub, young lion, adult lion) all showed up in the right order in one 8-second clip.
How much does Kling 4.0 cost on Higgsfield?
At the launch price shown on the Generate button on Oct 25, 2026, an 8-second clip cost 8 credits (old price 32, shown crossed out) and a 30-second clip cost 30 credits. Check the Generate button for today's price.
Does Kling 4.0 have sound?
Yes, stereo sound (Kling 3.0 was mono). The dialogue in my street-interview and yeti tests came out word for word.
What resolution does Kling 4.0 make?
1080p on Higgsfield, with aspect ratios up to 21:9. I used 16:9, 9:16 and 21:9 in my tests.
How long does a 30-second Kling 4.0 clip take to render?
My 30-second drone one-take took about 20 minutes.
