Kling 4.0: Turning Text and Keyframes Into 30-Second AI Video

Kling 4.0 is an AI video generator that turns a written prompt, a reference file, or a set of keyframes into short clips up to 30 seconds long. According to the Kling 4.0 product page, it supports 720p and 1080p output and lets you guide motion and camera moves with text, reference material, or up to 10 keyframes.

What you can control

The practical difference from earlier models is the keyframe budget. With up to 10 keyframes, you can stage a shot across several poses or camera positions and let the model interpolate the motion between them, which is useful for product turns and character moves.

Where text prompts fit

For first drafts, a plain text prompt is enough to get a 30-second clip. Describing the subject, the setting, and the camera intention up front keeps the result on brief. Reference files such as an image or a style frame help lock the look before you refine with keyframes.

A simple workflow

A workable routine is to generate a text-to-video pass, review the motion, then add keyframes at the moments that drift. Because each clip can run to 30 seconds, you can cover a full beat of a scene without stitching multiple generations.

Keeping expectations realistic

Treat the output as a starting point. According to the product page, resolution tops out at 1080p and clip length at 30 seconds, so plan edits around those limits. Kling 4.0 is most useful when you already have a shot list and want a fast, editable first version.