API Coming Soon

Kling 4.0 Flash

Kling 4.0 Flash API — Fast 720p Video, Coming to APIMart

Kling 4.0 Flash brings Kling 4.0 generation to a lighter, faster tier: 3–20-second videos at 720p from text, a first-frame image or Omni Reference. Flash is in limited early access on Kling; APIMart API access is coming soon.

API Coming Soon3–20 Seconds720p8-bit SDROmni Reference

Kling 4.0 Flash Preview

Official Flash specifications, with APIMart API access still coming soon

API Coming Soon

Kling 4.0 Flash: speed and value for frequent creation

Kuaishou opened Kling 4.0 Flash to a limited group of users on September 28, 2026. This page summarizes the officially published Flash specifications; APIMart availability, supported API parameters and pricing will be confirmed separately.

3–20-second single generations at 720p with 8-bit SDR output
Text-to-video, first-frame image-to-video and Omni Reference input
No first/last-frame or multi-keyframe control — those, plus 1080p/4K and 30 seconds, belong to full Kling 4.0

Updated October 14, 2026

Read the official Kling 4.0 release page Compare with the full Kling 4.0 preview

Announced Kling 4.0 Flash capabilities

Specifications published by Kling for Flash. Limits that Kling has not published are marked as such, and APIMart API support will be confirmed after integration.

Faster, more cost-effective tier

Kling positions Kling 4.0 Flash as a lighter, faster and more cost-effective way to create than full Kling 4.0. No speed figures or prices have been published yet.

3–20-second generations

Each Kling 4.0 Flash generation runs from 3 to 20 seconds — long enough for complete short-form beats without the cost of the full model's 30-second range.

720p output in 8-bit SDR

Flash outputs 720p video in 8-bit SDR. 1080p, 4K and the 10-bit HDR announced as coming soon are full Kling 4.0 features, not Flash features.

Text-to-video

Describe the subject, action, scene and camera movement in a prompt and Kling 4.0 Flash generates the clip. Kling has not published a separate prompt length limit for Flash.

First-frame image-to-video

Start from a single image and animate it into motion — useful for product photos, character art and key visuals that should open the video exactly as designed.

Omni Reference

Kling 4.0 Flash supports Omni Reference for multimodal guidance. Kling has not published Flash reference limits, so full Kling 4.0's 15-reference cap should not be assumed.

Clear boundaries

Flash does not list first/last-frame control, multi-keyframes or video editing. Choose full Kling 4.0 when a project needs keyframes, 4K or 30-second shots.

One API key on APIMart

APIMart already serves Kling 3.0, Kling 3.0 Turbo, Kling Video O1 and other Kling models through one API key. Kling 4.0 Flash endpoints will be documented once access is confirmed.

Workflows to plan for Kling 4.0 Flash

Applications of the announced Flash capabilities for teams that need frequent, affordable video generation.

High-volume social content

Produce daily short-form clips for social channels, where 720p and 3–20-second durations match how the content is actually watched.

Ad creative variations

Generate several hooks, scenes and pacing options quickly to test which creative direction performs before investing in a final cut.

Product clips from photos

Use first-frame image-to-video to turn existing product photos into short motion clips for listings, stores and marketplace ads.

Drafts before the full model

Explore prompts and storyboards with Kling 4.0 Flash, then move the strongest concepts to full Kling 4.0 when you need keyframes, 1080p or 4K.

Reference-guided brand content

Use Omni Reference to keep characters, products or visual styles closer to your source material across a series of clips.

Rapid prompt iteration

Iterate on wording, camera direction and scene details at a faster, lower-cost tier, keeping the full model for final renders.

Kling 4.0 Flash API FAQ

Official specifications, how Flash differs from Kling 4.0, and upcoming APIMart access.

What is Kling 4.0 Flash?

Kling 4.0 Flash is the faster, more cost-effective tier of Kuaishou's Kling 4.0 AI video model. It generates 3–20-second videos at 720p in 8-bit SDR from text, a first-frame image or Omni Reference.

When was Kling 4.0 Flash released?

Kling opened Kling 4.0 Flash to a limited group of users for early access on September 28, 2026; Kling's launch post names Ultra Yearly subscribers as the initial audience. A broader release date has not been announced.

What are the official Kling 4.0 Flash specifications?

Kling lists 3–20-second single generations, 720p resolution and 8-bit SDR output, with text-to-video, image-to-video and Omni Reference modes. Aspect ratios, audio, prompt length and reference limits have not been published for Flash.

How does Kling 4.0 Flash differ from Kling 4.0?

Flash trades length, resolution and control for speed and value. Full Kling 4.0 is announced with 3–30-second generation, 720p/1080p/4K output, up to 10 keyframes, up to 15 references and stereo audio; Flash stops at 20 seconds and 720p.

Does Kling 4.0 Flash support first/last frames or keyframes?

Flash supports image-to-video from a first frame. Kling's comparison does not list first/last-frame control or multi-keyframes for Flash; those are full Kling 4.0 features.

Is there a Kling 4.0 Flash API?

Not yet. Kling's developer platform lists the Kling 4.0 API as coming soon without a model ID or price, and APIMart has not integrated Kling 4.0 Flash. APIMart will publish endpoints and parameters once access is confirmed.

How much will Kling 4.0 Flash cost on APIMart?

APIMart pricing has not been announced. Kling describes Flash as more cost-effective than full Kling 4.0, but credit costs in Kling's app do not translate into API pricing. Prices will be published when access is confirmed.

Which Kling models can I use on APIMart today?

Kling 3.0, Kling 3.0 Omni, Kling 3.0 Turbo, Kling 2.6, Kling Video O1 and Kling Motion Control are available on APIMart now, with live pricing on each model page.

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