Kling 4.0 hands-on tests and comparisons

A user generated a 1080p, 20-second video in Kling 4.0 from a reference photo of their home plant and says the result looks almost identical to the real thing.

A creator made a 90-second ninja action short on Pollo AI with Kling 4.0, citing 30s single generations, 10 keyframes, 15 references and stereo audio.

Runware added Kling 4.0 on day one as klingai:kling-video@4.0, offering up to 30s of 1080p video with native audio, up to 15 keyframe inputs per request, prompt-based fragment editing, and pricing from $0.133/sec with a 15% launch-week discount.

The creator tested Kling 4.0 on Pollo AI with giant creatures, fighter jets, oceans and explosion action, highlighting keyframes, multi-reference and 30s generation.

A creator shares concrete tips for Kling 4.0 beat-synced short video: arc the thumb around the bottom-right corner, drive prop parts programmatically, and add focus lines at key poses.

A creator generates a perfume-rocket ad with Kling 4.0 on Picsart and shares the full prompt including beat sheet, negative cues and 9:16 specs.

A night-forest skateboarding short generated with Kling 4.0 on Picsart, with a full prompt covering camera moves, spoken lines and on-set-only audio; a partner post that still shares the prompt.

A complete 30-second shot-by-shot prompt using nature-documentary narration to film a cat riding a robot vacuum, reusable for testing Kling 4.0.

Using Kling 4.0 on Pollo AI, the creator guided character expressions, Japanese dialogue and follow-cam moves from reference images, stitching 30s segments into one short.

The author published a YouTube video comparing Kling 4.0 and Seedance 2.5 to see which video model performs better.

A user says Kling 4.0 controls characters, objects, audio and keyframes in one generation, making 30-second single-pass scenes useful, with native 4K coming.

An editor summarizes Kling 4.0: native 30 seconds, up to 10 keyframes, 2-minute extension, 4K/10-bit HDR and 21:9, arguing workflows may shift from stitching short clips to single continuous takes.