Kling-4.0

Video

Kuaishou Kling's new-generation video generation model, focused on realism, controllability, and professionalism. It excels at large-scale motion and complex camera work, keeping footage stable and coherent in high-speed motion, tracking, and orbiting shots. It natively generates 3–30 seconds per run and supports long takes and continuous narrative. Keyframe mode supports the first frame, first and last frames, and intermediate frames at any point on the timeline, up to 10 frames. Omni Reference can combine up to 15 assets per task (images, videos, subjects, and voice tones) to precisely reuse appearance, motion, camera movement, and rhythm, and supports local edits to facial expressions, motion, background, and more in existing videos. Audio and video are generated together with dual-channel stereo and multilingual lip sync; prompts can be up to 8,000 tokens. Output is 720p/1080p, supports a 21:9 ultra-wide aspect ratio, and is suited for advertising and marketing, film and TV shorts, short dramas, and e-commerce content creation.

Resolution

720p

1080p

Without video input

35% off

¥0.65/ sMarket: ¥1

¥0.975/ sMarket: ¥1.5

With video input

35% off

¥0.39/ sMarket: ¥0.6

¥0.585/ sMarket: ¥0.9

Input

Text / Image / Video / Audio

Output

Video

Input

5
315

生成视频的时长(秒),本模型可选 3-15,默认 5

生成视频的分辨率,本模型可选 720P、1080P,默认 720P

生成视频宽高比,文生视频可选 16:9、9:16、1:1,默认 16:9

是否生成音频,默认关闭;3.0 系列 720P 起支持有声

模型随机种子

是否自动优化提示词,开启后自动优化 prompt 以提升生成质量

点播输出配置;子字段名必须与上游请求字段一致(运行时按对象整体透传,不会重命名子键)

Optional. Slots follow the model's input_references declaration; upload a local file or paste a public URL.

First frame imageimage · first_frame
Last frame imageimage · last_frame

Last frame requires a first frame URL

Reference imageimage · reference_image
Click to upload

Multiple allowed; referenced as Image 1, Image 2... in the prompt

Output

How is the Kling-4.0 API billed?
Kling-4.0 is pay-as-you-go from ¥0.39 from / s. The rate depends on output resolution (720p / 1080p) and whether video input is included; see the pricing table on this page. Billed at EasyAPI's public price, no subscription required.
How do I call Kling-4.0 through the API?
EasyAPI exposes an OpenAI-compatible API: create an API key in the console, set base_url to https://token.easyapi.com and model to kling/Kling-4.0, then send requests to /v1/videos. The Quick Start on this page includes cURL, Python and TypeScript examples; official OpenAI SDKs only need the base_url swapped.
Which video generation parameters does Kling-4.0 support?
prompt, duration, resolution (720p / 1080p), aspect_ratio, generate_audio, seed and input_references (first frame, last frame, reference video and audio) for text-to-video and image-to-video. See the Parameters table on this page for details.
How do I get started with Kling-4.0?
Sign up for EasyAPI, create an API key in the console and top up your balance to call Kling-4.0 pay-as-you-go, no subscription needed. You can also try it in the online Playground first, then copy the Quick Start example.