Video modelLimited access

Kling 4.0 Flash

Kling AI

Released: September 28, 2026
Data date: October 7, 2026

Model type: Proprietary model
Maximum resolution: 720p (8-bit SDR)
Maximum duration: 20 seconds per generation

Kling 4.0 Flash is the faster variant of Kling 4.0, generating up to 20 seconds of 720p video in 8-bit SDR. It supports text, image, and Omni references, but not first/last frames or multiple keyframes. Access for Ultra Yearly subscribers began on September 28, 2026.

Specifications and access

Specification	Value and source
Model type	Proprietary modelSource
Variant	Kling 4.0 Flash, described separately from the full Kling 4.0 as a fast-creation optionSource
Announcement	Provider announcement on September 30, 2026Source
Availability	Available to Ultra Yearly subscribers from September 28Source
Access	Web product, limited to Ultra Yearly subscribersSource
Input modalities	Text and imagesSource
Reference control	Omni Reference; first/last frames and multi-keyframes are not supportedSource
Maximum resolution	720p (8-bit SDR)Source
Maximum duration	20 seconds per generationSource
Output modalities	VideoSource

Sources and data date

Type	Evidence and data date
Research status	Research date October 7, 2026. 6 source URLs checked. This documents the inspected sources, not an exhaustive inventory of every publication.
Not found in the inspected sources	exact Kling 4.0 Flash numeric benchmark Original wording The official Kling 4.0 post names Flash but publishes no numeric evaluation for that exact tier. The checked Arena video leaderboards have no exact Flash row. Results for full Kling 4.0, Kling 3.x, or user demonstrations are not transferable.
Additional source	Kling AI Kling 4.0 announcement (retrieved October 7, 2026) · Kling AI Kling 4.0 announcement · Editorial description reviewed October 7, 2026
Additional source	Kling 4.0 and Flash feature comparison (retrieved October 7, 2026) · Kling 4.0 and Flash feature comparison · Editorial description reviewed October 7, 2026