Kling 4.0

In Kling 4.0, the more keyframes there are, the stronger the narrative controllability, but the higher the upfront design cost.

Kling 4.0 ranked 20th of the day on Product Hunt with 69 votes.

Kling 4.0 supports up to 10 keyframes, 15 reference materials, and 8,000-token prompts.

Kling 4.0 builds stereo audio and lip sync directly into the model, supporting more than 10 languages.

Kling 4.0 includes a Creative Recreation feature that can replace products or characters in existing videos.

Kling 4.0 provides MCP and CLI access methods, allowing direct integration into agent workflows.

The actual quality of multilingual lip sync (especially for non-English languages) has no demonstration details on the Product Hunt page, and can only be judged through actual testing.

According to official information, ReelDance will also integrate Kling 4.0, with details available on its model page.

Kling 4.0's release has made it possible for e-commerce and advertising teams to try it, but before use it is necessary to confirm whether the account provides the required model and whether image input is supported, and both conditions are indispensable.

According to Kling's official quick-start documentation, the full version 4.0 and Flash are two independent paths and cannot be conflated.

When verifying Kling 4.0 access, three things need to be checked: the image input entry point, the control items for single-shot camera movement, and the deduction amount displayed before submission.

Regional differences in AI video generation services usually stem from compliance requirements, compute deployment strategies, or phased rollout plans, and Kling 4.0's full-version features may not yet be available in certain countries or regions.

In Kling 4.0 full version, the Keyframes feature only accepts images as keyframe input, supports up to 10 keyframe images per task, and the output duration ranges from 3 to 30 seconds.

Keyframes and Omni Reference cannot be stacked in the same task, meaning one must choose between "precisely controlling every frame" and "flexibly referencing multiple subject images".

Kling 4.0's single native generation duration has been increased to a maximum of 30 seconds.

Kling 4.0's text input length has been increased to a maximum of 8000 tokens.

Kling 4.0's all-purpose reference feature supports flexible combinations of images, videos, subjects and voice timbres in a single task, up to 15 items in total.

Kling 4.0 supports input of up to 10 keyframes for precise multi-keyframe control.

Kling 4.0 supports picture output at up to 10-bit HDR specifications.

Kling's published model guide describes native generation of up to 30 seconds and support for up to ten keyframe images.