Kling 4.0 Flash is a faster, cheaper version of Kling 4.0. It makes 720p clips of 3 to 20 seconds and can follow a start frame, reference images, reference videos and Elements. Use it when you want to iterate quickly or keep costs down.
Who can use it
All users in free trial or paid plans.
Where to find it
Studio > Video > Model > Kling 4.0 Flash
For edits: Studio > Tools > Kling 4.0 - Video edit, then choose Kling 4.0 Flash as the model.
How to use it
Open Studio and choose the Video composer.
Select Kling 4.0 Flash as the model.
Write your prompt and pick the duration (3 to 20 seconds) and aspect ratio.
Optionally add a start frame, reference images, reference videos or Elements.
Check the credit cost on the Generate button, then click Generate.
Options
Duration: 3 to 20 seconds.
Resolution: 720p only.
Aspect ratio: 9:16, 16:9, 1:1 or 21:9.
Start frame (no end frame or keyframes).
Reference images and reference videos (each 3 to 20 seconds, 20 seconds together).
Elements.
Credits
23 credits per second. A 10-second clip costs 230 credits.
With reference videos: 16 credits per second, counted on your clip plus your reference videos, and at least twice your clip's length.
Credit costs here are the standard rates. The Generate button in the app shows what each generation costs on your account.
Where it works
Studio, Workflows, the Arcads MCP and the public API. As a model option in Kling 4.0 - Video edit.
Limitations
720p only, with clips up to 20 seconds. No end frame or keyframes. For 1080p or clips up to 30 seconds, use Kling 4.0. In Video edit, the source video can be up to 20 seconds.