Kling 4.0 is out for everyone, with 30-second clips and 4K output

Kling AI made Kling 4.0, its new video model, available to everyone on October 15, 2026, according to its release notes. It makes clips of 3 to 30 seconds in one generation, at 720p, 1080p or 4K, with two-channel stereo sound. A faster model, Kling 4.0 Flash, came with it.

What Kling 4.0 does

• Longer clips: 3 to 30 seconds per generation.
• Keyframes: up to 10 keyframe images to set story beats, plus first-and-last-frame mode.
• Omni Reference: up to 15 reference items in one generation: up to 10 images, up to 5 videos (30 seconds in total) and up to 7 elements. Audio references are voice only.
• Prompts: up to 8,000 tokens.
• Aspect ratios: 21:9, 16:9, 1:1, 9:16 or auto.
• Speech and on-screen text: Chinese, English, Japanese, Korean, Spanish, Portuguese, German, French, Hindi and more. English accents include American, British and Indian.
• Editing: up to 5 input clips, each 3 to 30 seconds, with a combined length of 30 seconds or less.

Kling 4.0 and Kling 4.0 Flash

	Kling 4.0	Kling 4.0 Flash
Clip length	3–30 seconds	3–20 seconds
Resolution	720p, 1080p, 4K	720p
Dynamic range	10-bit HDR at 1080p and 4K	8-bit SDR
Inputs	Text, image, first and last frames, keyframes, Omni Reference	Text, first frame, Omni Reference

Kling says Flash is built for frequent creation, with faster generation.

What isn’t live yet

Two features in the note are marked “coming soon”. The spec table lists 10-bit HDR for 1080p and 4K, but the highlights section says HDR output is still coming. Video extension, which would let you extend a clip several times up to 2 minutes, is also coming soon.

Kling 4.0 is also available through Kling’s MCP server and CLI, including Omni Reference and keyframes. The release note also introduces a redesigned creation page with one input box, grid and list views, a timeline and a canvas with an agent.

Price

The release note gives no prices or credit costs for Kling 4.0 or Flash.

Before you plan a project around 30-second 4K clips, run one short test in the app and check how many credits it used on your plan.