Kling 4.0 Flash opens to everyone at $0.094 a second

Kuaishou's Kling AI opened Kling 4.0 Flash to every user on November 4, 2026, ending a waitlist and publishing the per-second price the model never had. The model is now callable on the Kling AI website and through the company's public API, and it arrives with a set of integrations that put it inside professional editing software rather than in a browser tab.

Kling 4.0 Flash is the lighter, faster tier of Kling's 4.0 generation. It was first handed to Ultra Yearly subscribers, Kling's annual "Black Gold" plan, on September 28, a month before the full Kling 4.0 API opened on October 28. In that early window there was no endpoint, no model identifier and no published rate, so early write-ups could only describe Flash as a speed-and-value tier with its limits unstated.

Those limits are now public. Flash generates 3 to 20 seconds of video at 720p, with no higher resolution offered, from a text prompt, a single first-frame image, or Omni reference. Kling's own announcement lists up to 10 reference images, 5 reference videos and up to 15 inputs on an Omni task.

The price is the headline. Kling's rate card gives Flash two rows, both at 720p, and the API router OrcaRouter reads them as $0.094 a second with no input video and $0.063 a second with input video. OrcaRouter puts the first figure about 40% below the $0.157 the full Kling 4.0 charges for the same second at the same resolution. The second figure carries a billing rule that changes it: Kling bills the with-input-video row on twice the output duration when the input is no longer than the output, which turns the cheapest-looking line on the card into the more expensive way to use the model.

The integrations are the part that changes where the model sits rather than what it can do. Kling now ships plugins for Adobe Photoshop, Premiere Pro and After Effects, along with access through MCP, a command-line client and AI plugins. A model that lives in a browser is something a creator leaves the edit for; a model that lives in a Premiere panel is something they use in the middle of a cut. Kling has not published how the plugin round-trips, so whether a clip returns as linked media or a flattened render is untested.

For creators, Flash is a draft-and-iterate tier: 720p caps what it can finish, but at under a dime a second it is priced for running many takes and upscaling the keeper elsewhere.

Kling 4.0 Flash is live now on the Kling AI website and through the API endpoints /text-to-video/kling-4.0-flash, /image-to-video/kling-4.0-flash and /omni-video/kling-4.0-flash.