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KuaishouKling 4 familyCurrentVideo generationReleased 15 Oct 2026

Kling 4.0 (and 4.0 Flash)

Kuaishou’s Kling 4.0 video model: up to 30 s per pass, up to 15 references and 10 keyframes. Through fal it is an async queue call (submit, then poll the request id).

Model idkling/v4/image-to-video

Price$0.157 per second 720p

Checked25 October 2026

Where it stands

1newer video generation model since its release

All video generation models

Before it from Kuaishou
Kling 3.0 (VIDEO 3.0 / 3.0 Omni)Feb 2026
Weights
Closed weights; access is hosted only.

How to call it

6 ways to use Kling 4.0 (and 4.0 Flash), with the model id each provider expects.

Providers, model ids, endpoints and docs for Kling 4.0 (and 4.0 Flash)
ProviderModel idEndpointDocs
fal.ai kling/v4/image-to-video https://queue.fal.run/kling/v4/image-to-video fal.ai
fal.ai kling/v4/text-to-video https://queue.fal.run/kling/v4/text-to-video fal.ai
fal.ai kling/v4/reference-to-video fal.ai
fal.ai (Omni video edit) kling/v4/video-to-video/edit fal.ai
fal.ai (4.0 Flash) kling/v4/flash/text-to-video fal.ai
Web app kling.ai

Pricing

Prices for Kling 4.0 (and 4.0 Flash)
Per second 720p$0.157
Per second 1080p$0.235

As published: “USD per second of output on fal (kling/v4/text-to-video, image-to-video and reference-to-video, read 2026-10-25); reference-to-video with video references $0.094 / $0.141 per s, billed on input plus output length (minimum 2x the output). Kling’s own API price not found”.

Source: fal.ai, checked 25 October 2026.

Specs

Input
Text, images and video
Output
Video and audio
Context window
Not published
Max output
Not published
Open weights
No
Licence
Proprietary
Released
15 October 2026
Status
Current
Type
Video generation

What stands out

What its maker marketed at launch, and what people found later, each with its source.

  • 30-second single-pass clips

    Native generation of up to 30 s in one pass (Kling 3.0: 15 s); fal’s endpoints take 3-30 s, 720p or 1080p, with per-shot multi-prompts.

    Source: bernama.com

  • Omni Reference with keyframes

    Up to 15 reference assets and up to 10 keyframe inputs per generation (Kuaishou release); start and end frame on image-to-video.

    Source: bernama.com

Notes

Unveiled 2026-09-28 (Lite/Flash for annual subscribers), official launch 2026-10-15 per Kuaishou’s Oct 19 release, open to all users on klingai.com from ~Oct 16 (Pandaily: with audio, MCP and CLI hooks). Not yet on the Artificial Analysis text-to-video or image-to-video boards (read 2026-10-25), so it has no independent rank; Kling 3.0 Pro is the boards’ 1000 anchor. 4K and 10-bit HDR availability reported inconsistently.

curl -X POST https://queue.fal.run/kling/v4/image-to-video -H "Authorization: Key $FAL_KEY" \
  -H "Content-Type: application/json" \
  -d '{"start_image_url":"https://example.com/character.png","prompt":"she turns and walks toward the camera","duration":5,"resolution":"1080p"}'

Sources: https://bernama.com/en/press/news.php?id=2622471 · https://fal.ai/models/kling/v4/image-to-video · https://fal.ai/models/kling/v4/text-to-video · https://fal.ai/models/kling/v4/reference-to-video · https://technode.com/2026/10/16/kling-ai-4-0-suggests-a-shift-in-ai-video-competition-from-visual-quality-to-directorial-control/ · https://creaa.ai/blog/kling-4

Not yet checked against an official source: Kling’s own developer API for 4.0 was reported as ‘coming soon’ by third-party trackers (creaa.ai, wireflow, Oct 16); not checked on Kling’s JS-rendered docs. fal’s v4 endpoints (OpenAPI schema read 2026-10-25) expose no audio parameter, so audio via fal is not confirmed.