Kling 4.0 Flash · Now open to everyone
Kling 4 FlashAI Video Generator
Type a prompt — or add an image or a video — and get a 3–20 second 720p clip in minutes. No Kling AI account needed.
120 free credits on sign-up · 5s video = 120 credits · failed videos refunded Add an image or video in the studio →
Start from a prompt idea
Every card shows a working prompt — subject + action + camera + mood. Copy it, or send it straight to the studio.
Macro shot of espresso pouring from a chrome portafilter in two thin streams into a clear glass, crema rising in the cup. The camera stays still at cup height with a shallow depth of field. Warm café light and a soft background blur, calm and precise mood.
What is Kling 4 Flash?
Kling 4.0 Flash is the fast, high-value member of the Kling 4.0 video model family. It opened to Ultra Yearly subscribers on September 28, 2026 and to everyone — including the API — on November 4, 2026. Here it generates 3–20 second 720p clips from text, a first-frame image, reference media, or a source video, with up to 10 reference images and 5 reference videos per task. The comparison below keeps Flash and the full Kling 4.0 apart: only officially published specs are listed.
Read Kling's release notes| Kling 4 Flash | Kling 4.0 | |
|---|---|---|
| Clip length | 3–20 seconds | 3–30 seconds |
| Resolution | 720p | Up to 1080p (4K announced) |
| Modes here | Text / image / reference / video edit | Up to 10 keyframes |
| Best for | Fast iteration, social shorts | Finished, high-resolution shots |
One box, four modes
No mode picker — the media you upload decides. Add nothing for text-to-video, or attach images and videos and the studio switches automatically.
Text to video
Just a prompt. Describe subject, action, camera and mood for a 3–20s clip.
Image to video
One image becomes the first frame — the model animates from there.
Reference to video
2–10 images or 1–5 videos guide the look, subject or motion.
Video edit
One video (≤100 MB) is edited by your prompt; billed on the source length.
Why create here
Four practical ways to create with Kling 4 Flash on kling40flash.com.
Generate right now
Kling 4.0 Flash is live in the studio today — sign in and create a clip in minutes, while some sites are still showing placeholders.
One box, four modes
No mode picker: write for text-to-video, attach an image for first-frame, add more images or videos for reference, or drop one video to edit it.
Pick 3–20 seconds, see the price first
Choose any duration second by second. Text and image modes cost 24 credits/s; clips with a reference video or an edit source cost 32 credits/s — shown before you generate.
Free to start, fair on failure
120 free credits on sign-up cover a 5-second video at the default rate (120 credits). Failed generations are refunded automatically — and no Kling AI account is needed.
How to use it
Three steps in the studio — the browser is enough.
- 01
Write a prompt or add media
Describe subject + action + camera + mood, or attach images and a video to switch modes.
- 02
Pick duration and aspect
Choose 3–20 seconds and 16:9, 9:16, 1:1, 21:9, or auto.
- 03
Check credits, generate, download
The price in credits is shown before you run (a 5s clip = 120); download the MP4 when it's done.
What you can make
Six ways people put a fast video model to work.
E-commerce product clips
Animate a product photo into a short showcase for listings and ads.
Social shorts
TikTok, Reels and Shorts formats at 9:16, ready in minutes.
Ads & UGC-style footage
Draft ad creatives and UGC-style clips without a shoot.
Bring photos to life
Turn a still image into a moving moment with first-frame image-to-video.
Storyboards & concepts
Sketch scenes and previsualize ideas before a full production.
Restyle existing clips
Upload a video and edit its look or scene with a prompt.
Simple per-second pricing
You pay per second of video. Text, image and image-reference seconds are 24 credits; seconds that involve a reference video or a video-edit source are 32 credits.
24
Text / image / image-reference
32
With reference video / video edit
| Duration | Text / image / image-reference | With reference video / video edit |
|---|---|---|
| 5s | 120credits | 160credits |
| 10s | 240credits | 320credits |
| 15s | 360credits | 480credits |
| 20s | 480credits | 640credits |
Frequently asked questions
What is Kling 4 Flash?
Kling 4.0 Flash is the fast, value-focused member of Kuaishou's Kling 4.0 video model family, built for frequent creation. On kling40flash.com you can use it directly in the browser to generate 3–20 second 720p clips.
When was Kling 4.0 Flash released?
Kling announced the Kling 4.0 family on September 28, 2026; Flash was initially limited to Ultra Yearly subscribers, then opened to all users and the API on November 4, 2026.
Can I use Kling 4 Flash for free?
Yes — new accounts get 120 free credits, enough for one 5-second video at the default rate (120 credits), with no card required.
How much does a Kling 4 Flash video cost here?
Per second of duration: 24 credits for text-to-video, image-to-video and image-only reference; 32 credits per second when a reference video or a video-edit source is involved. A 5-second text-to-video is 120 credits — see /pricing for the full table.
Kling 4 Flash vs Kling 4.0 — what's the difference?
Flash is the faster, more affordable version: 3–20 seconds at 720p. The full Kling 4.0 runs to 30 seconds and up to 1080p (with 4K announced) and supports up to 10 keyframes — pick Flash for quick drafts and social clips, 4.0 for finished high-resolution shots.
Can I turn an image into a video?
Yes. One image becomes a first-frame image-to-video; two to ten images switch to reference mode where the model uses them to guide subject and style.
Can I edit an existing video with Kling 4 Flash?
Yes — upload one video up to 100 MB and describe the change in a prompt. Video edits are billed on the source clip's duration rounded up, within the 3–20 second range.
How long and what resolution are the videos?
Clips run 3–20 seconds at 720p, with aspect ratios of 16:9, 9:16, 1:1, 21:9, or auto.
Is there a Kling 4 Flash API?
Yes — Developers → API Keys uses model id `kling-4.0-flash`. See /docs for the integration details.
Can I use the videos commercially?
Videos you generate are yours to use in your projects, including commercial work, subject to the Terms of Service and acceptable-use rules.
Is this the official Kling AI website?
No. kling40flash.com is an independent third-party service and is not affiliated with or endorsed by Kling AI or Kuaishou Technology.
Create your first Kling 4 Flash video
120 free credits on sign-up — enough for a 5-second clip. No Kling AI account needed.