Video generation
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Kling 4.0 Flash

by Kling

Kuaishou's speed‑tuned Kling 4.0 for high‑volume video.
Fast 3 to 20 second clips at 720p.

Kling 4.0 Flash

Key features

Slow-motion knife slicing a lemon, juice spraying in a bright fanTry now

Every clip below was generated on Morphic with Kling 3.0 Turbo, before Kling 4.0 Flash arrived here, so they show the use case rather than Flash's own output.

Technical specifications

720p

Standard dynamic range, built for web and social

3–20s

Per generation; the full Kling 4.0 runs to 30s

3 modes

Text to video, image to video, Omni Reference

Kling 4.0

The fast tier of Kuaishou's Kling 4.0 lineup

Use cases

Hook and format testing

Generate a dozen openings for the same ad, watch them as motion, and keep the one that stops the scroll.

Quick product loops

Short loops of a product opening, turning, or catching the light, turned around fast enough for a whole range.

Rapid prototyping

Block out motion and pacing in a quick draft, then send the version that works to the full Kling 4.0.

Stylized social shorts

Crayon, paper, and handmade looks for a weekly series, where steady output matters more than one perfect frame.

Scene blocking

Try a camera move and the staging of a scene before committing to a long, high-resolution generation.

Everyday brand content

The steady stream of posts, stories, and product moments a brand needs each week, at a cost that suits volume.

Prompt examples

Lemon macro

Slow-motion knife slicing a lemon on a wet board, juice spraying in a fan

Edit prompt

Record drop

A needle drops on a spinning record, camera pulls back to a dusk living room

Edit prompt

Gift reveal

A pastel gift box lid pops off and gold confetti rains down in slow motion

Edit prompt

Tea bloom

Top-down: hot water pours into a glass teapot, tea leaves unfurling

Edit prompt

Nail polish

Vertical close-up: glossy coral polish brushed on a nail in one stroke

Edit prompt

Puppy chaos

Vertical: a puppy tugs a sock from a laundry basket and scampers off

Edit prompt

Overview

Kling 4.0 Flash is the speed-tuned tier of Kuaishou's Kling 4.0, introduced in the Kling 4.0 release note in September 2026. It makes 3 to 20 second clips at 720p from a prompt, a still image, or reference input, with fast generation and a lower cost per clip than the full model.

What Kling 4.0 Flash does differently

Flash trades length and resolution for speed. It stops at 20 seconds and 720p, where the full Kling 4.0 runs to 30 seconds, at up to 1080p on Morphic. That makes it the tier for volume: hooks, product loops, social series, and quick drafts before a final render.

Kling 4.0 Flash on Morphic

Kling 4.0 Flash is live in the video model picker, next to the full Kling 4.0. Pick it on the Canvas, or ask Copilot for it by name. It runs at 720p in 3 to 20 second takes with native audio, and takes a prompt, a single still as the first frame, or reference images and clips, up to ten images and five videos.

That makes it the tier for the pass where you are still choosing. Run a batch of variations on Flash, pick the take that works, and move it to the full Kling 4.0 when you need the extra length or 1080p.

Simple pricing

Get started for free today, with the option to upgrade or cancel anytime.

Basic

$19/ month
billed as $228 per year

2400 monthly credits

1 user only

All models

Workflows

Standard

$24/ month
billed as $288 per year

3625 monthly credits

1 user only

All models

Workflows

Pro

$45/ month
billed as $540 per year

6350 shared monthly credits

1 user

+ up to 4 more at extra cost

All models

Workflows

Max

$170/ month
billed as $2040 per year

24650 shared monthly credits

1 user

+ up to 9 more at extra cost

All models

Workflows

Enterprise

For higher limits

Custom

pricing and billing terms

High-volume credits
Custom seat limits
All models
Workflows
Pricing Gradient

Free

For playing around

$0

forever free

Up to 20 credits
1 user only
Limited models
Workflows
Compare plan details

FAQs

What is Kling 4.0 Flash?
Kling 4.0 Flash is the speed-tuned tier of Kuaishou's Kling 4.0 video model, announced in September 2026. It makes 3 to 20 second clips at 720p from text, images, or reference input, with fast generation and a lower cost per clip than the full Kling 4.0.
What is Kling 4.0 Flash best for?
High-volume video that still needs to look directed: batches of social clips, hook and format tests, product loops, and quick drafts of a scene before the final render.
How is Kling 4.0 Flash different from Kling 4.0?
Flash trades length and resolution for speed and value. Kuaishou lists Kling 4.0 at 3 to 30 seconds and up to 4K, with keyframes, first and last frame control, and 10-bit HDR coming; on Morphic it runs to 1080p. Flash runs 3 to 20 seconds at 720p in standard dynamic range.
What resolution and length does Kling 4.0 Flash support?
Kling 4.0 Flash outputs 720p in standard dynamic range, with clips from 3 to 20 seconds per generation.
Does Kling 4.0 Flash support references?
Yes. Flash supports Omni Reference, so reference images and clips can hold a subject, product, or look steady across takes, alongside text to video and image to video.
Does Kling 4.0 Flash support keyframes?
Keyframes and first and last frame control are listed for the full Kling 4.0, not for Flash. When a clip has to hit exact frames, draft on Flash and render the final on Kling 4.0.
When should I use Kling 4.0 instead of Flash?
Switch to Kling 4.0 when a clip needs to run past 20 seconds, render at 1080p, follow keyframes, or carry HDR for grading. Keep Flash for drafts, tests, and anything you need many versions of.
Is Kling 4.0 Flash available on Morphic?
Yes. Kling 4.0 Flash is in the video model picker alongside the full Kling 4.0, and Copilot will use it if you ask for it by name. On Morphic it runs at 720p, in 3 to 20 second takes, with native audio, from a prompt, a single still as the first frame, or reference images and clips.

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Meta's Segment Anything model. Track any subject as a mask that follows it.

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ByteDance's full-scene audio model. Dialogue, music and effects, as separate tracks.