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Kling 4.0 Flash AI Video Generator

The fast, lower-cost tier of Kuaishou's Kling 4.0. Generate 3 to 20 second clips at 720p with sound made together with the picture, animate a first frame, combine up to 10 images and 5 videos as references, or rewrite a video of up to 20 seconds from a text instruction.

Kling Model Series

Kling 4.0 Flash Text-to-Video Example

A 5-second 16:9 clip made from one text prompt, shown here with the full prompt

Try Kling 4.0 Flash

Knight and Queen in a Ruined Hall

A low tracking shot follows a knight through a ruined throne hall as a dark queen rises from her throne.

“A handsome young knight walks alone through a ruined throne hall, sword lowered at his side. At the far end, a beautiful dark queen sits motionless on the throne, watching him. He stops halfway, and the broken banners above them begin moving in a sudden wind. She slowly rises. The camera starts behind the knight in a low tracking shot, then arcs slightly to reveal the queen’s full presence. Dark fantasy, oppressive atmosphere, strong scale, cinematic confrontation.”

Kling 4.0 Flash Image, Reference and Video Edit Examples

See what went in and what came out: a first frame, two character references and a source video

Try Kling 4.0 Flash
Image-to-Video: Painter in Her Studio - 1

Image-to-Video: Painter in Her Studio

01/03

What's Kling 4.0 Flash

The fast, lower-cost tier of Kling 4.0, for quick iteration and volume work at 720p

  1. 20sMax Clip Length
  2. 720pOutput Resolution
  3. NativeAudio
  4. 4Generation Modes

Kling 4.0 Flash is the speed-and-value tier of Kuaishou's Kling 4.0 video family. It outputs 720p only, in single clips of 3 to 20 seconds, with audio generated together with the picture. On Dreamega it runs in four modes: text-to-video, image-to-video from a first frame, reference-to-video with up to 10 images and 5 videos, and video edit for clips of up to 20 seconds, in 16:9, 9:16, 1:1 or 21:9. Full Kling 4.0 adds 1080p, clips of up to 30 seconds, last-frame and keyframe control, audio references and video extend, so Flash fits drafts and volume work where you don't need those.

Kling 4.0 Flash's Key Features

What you get at 720p, and where the limits are compared with full Kling 4.0

  1. 01

    Lower Cost per Second

    Flash is the fast, lower-cost tier of Kling 4.0, meant for quick iteration and volume work. On Dreamega, text-to-video costs 9.4 credits per second, compared with 15.7 for Kling 4.0 at 720p.

  2. 02

    3 to 20 Second Clips

    Pick any whole-second length from 3 to 20, in 16:9, 9:16, 1:1 or 21:9. Output is always 720p. For 1080p or clips up to 30 seconds, use Kling 4.0.

  3. 03

    Sound Made with the Picture

    Audio is generated together with the video. Describe the ambience, music or a line of dialogue in your prompt to steer what you hear.

  4. 04

    Image-to-Video from a First Frame

    Animate one image, with or without a prompt. The aspect ratio can follow the image. Flash has no last frame or keyframes; Kling 4.0 does.

  5. 05

    Reference-to-Video

    Combine up to 10 images and 5 videos with a prompt, calling each file @Image1 or @Video1. Reference videos guide motion, camera and pacing, and you can keep their original sound. Audio references are not available.

  6. 06

    Video Edit

    Change a subject, setting, weather or style in a 3 to 20 second video with a text instruction, while its scene, subject and motion carry through. Up to 10 reference images can guide the edit.

Kling 4.0 Flash vs Kling 4.0

Start on Flash while the prompt is still changing, then move to Kling 4.0 when you need 1080p, a longer clip, keyframes or audio references

Open Kling 4.0
FeatureKling 4.0 FlashKling 4.0
Resolution720p720p, 1080p
Clip length3–20 s3–30 s
Image-to-videoFirst frame onlyFirst frame, last frame and keyframes
ReferencesUp to 10 images and 5 videosUp to 10 images, 5 videos and 3 audio clips
Video editSources of 3–20 sSources of 3–30 s
Video extendNot availableAvailable
SoundGenerated with the pictureStereo, generated with the picture
Text-to-video on Dreamega9.4 credits/s15.7 credits/s at 720p, 23.5 credits/s at 1080p

How to Use Kling 4.0 Flash for Text-to-Video

Turn a written scene into a 3 to 20 second 720p clip with sound in three steps

  1. 01

    Describe the Scene and the Sound

    Name the subject, the action, the setting and the camera movement, such as a slow dolly-in or a handheld tracking shot. Then add what we should hear: ambience, music or a line of dialogue.

  2. 02

    Choose Length and Aspect Ratio

    Set a duration from 3 to 20 seconds and choose 16:9, 9:16, 1:1 or 21:9. Resolution is always 720p. The credit cost is shown before you generate.

  3. 03

    Generate and Iterate

    Review the clip and adjust the prompt. Once the prompt is settled, switch to Kling 4.0 if you need 1080p or a longer clip, or use Flash video edit to change the style or setting.

Kling 4.0 Flash YouTube Videos

Creator tests and side-by-side comparisons of Kling 4.0 Flash

  • I Tested Kling 4.0 Flash - And You Won't BELIEVE the Results! - AI for Real Life: Redefining Filmmaking
  • Kling 4.0 Flash Is Here…But There’s a Catch - T.J. Lovelady
  • Kling 4.0 Flash [NEW] vs Kling 4.0 🔥 Is Faster & Cheaper Actually Better? - Creative AI Show
  • TEST KLING 4.0 FLASH — Robot Transformation, Monster Fight & Cinematic Stress Test - soegimitro
  • Kling 4.0 flash vs Seedance 2.5 comparison - WonLabAI

Kling 4.0 Flash YouTube Videos

Creator tests and side-by-side comparisons of Kling 4.0 Flash

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Free
32points
  • Up to 3 videos
  • Up to 32 images
  • Multi-Model Support
  • Text to Video
  • Image to Video
  • Video to Video
Show more (+11)
  • Consistent Character
  • AI Animation Generator
  • Templates & Effects
  • AI Video Enhancers
  • Interactive Community
  • Faster Generation Speed
  • No-watermark Outputs
  • More Camera Movement
  • Private Video Visibility
  • Copy Protection
  • Priority Support

Pro

Popular

Elevate your AI experience

29.99USD / 1 Month
800
800 credits/mo
  • Up to 80 videos
  • Up to 800 images
  • 3 tasks(Parallel Tasks)
  • Multi-Model Support
  • Text to Video
  • Image to Video
Show more (+12)
  • Video to Video
  • Consistent Character
  • AI Animation Generator
  • Templates & Effects
  • AI Video Enhancers
  • Interactive Community
  • Faster Generation Speed
  • No-watermark Outputs
  • More Camera Movement
  • Private Video Visibility
  • Copy Protection
  • Priority Support

Lite

Start your AI journey

19.99USD / 1 Month
300 credits/mo
  • Up to 30 videos
  • Up to 300 images
  • 3 tasks(Parallel Tasks)
  • Multi-Model Support
  • Text to Video
  • Image to Video
Show more (+12)
  • Video to Video
  • Consistent Character
  • AI Animation Generator
  • Templates & Effects
  • AI Video Enhancers
  • Interactive Community
  • Faster Generation Speed
  • No-watermark Outputs
  • More Camera Movement
  • Private Video Visibility
  • Copy Protection
  • Priority Support
  • Card
  • Crypto accepted (BTC, USDT, ETH, 350+)
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Frequently Asked Questions

Still have questions?

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Kling 4.0 Flash is the fast, lower-cost tier of Kuaishou's Kling 4.0 video model. It makes 720p clips of 3 to 20 seconds with sound. On Dreamega it covers text-to-video, image-to-video, reference-to-video and video edit.
Flash stops at 720p and 20 seconds, while Kling 4.0 reaches 1080p and 30 seconds. Flash image-to-video takes a first frame only, its references can't include audio, and it has no video extend. In return it costs less per second: 9.4 credits against 15.7 for Kling 4.0 at 720p text-to-video.
Kling positions Flash as the faster member of the 4.0 lineup, but we haven't found a published generation-time figure or an independent benchmark, so we don't quote a number.
Clips run 3 to 20 seconds in whole-second steps, with 5 seconds as the default. Resolution is fixed at 720p, with no 1080p or 4K. Aspect ratios are 16:9, 9:16, 1:1 and 21:9. Reference-to-video also offers Auto, while image-to-video and video edit can follow your image or source video.
Yes. Audio is generated together with the picture, and you can describe ambience, music or a line of dialogue in the prompt. In reference-to-video and video edit, new audio is the default, and you can choose to keep the original sound of the input video instead.
In reference-to-video, upload up to 10 images and 5 videos, then call them in upload order as @Image1, @Image2, @Video1 and so on. Reference videos guide motion, camera and pacing, and together they are used for up to 20 seconds. Audio files can't be used as references; Kling 4.0 accepts them.
The source video should be 3 to 20 seconds; anything longer is trimmed to 20 seconds. You describe the change in text and can add up to 10 reference images. There is no separate duration setting, and the output's aspect ratio follows the source unless you choose another.
Text-to-video, image-to-video and reference-to-video without reference videos cost 9.4 credits per second, rounded up per video: 5 seconds is 47 credits, 10 seconds is 94 and 20 seconds is 188. Reference-to-video with reference videos costs 12.6 credits per output second, so 5 seconds is 63 credits. Video edit costs 12.6 credits per second of source video, up to 20 seconds: a 5-second source is 63 credits and a 20-second source is 252. If the source length can't be read, the edit is priced at 20 seconds. All modes are available on the free plan.

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