# Kling40Flash FAQ

## What is Kling 4 Flash?

The speed- and value-focused member of the Kling 4.0 video model family. This site offers it directly in the browser as model `kling-4.0-flash`.

## When was Kling 4.0 Flash released?

Kling announced the Kling 4.0 family on September 28, 2026, with Flash initially limited to Ultra Yearly subscribers; it opened to all users and the API on November 4, 2026.

## How much does a Kling 4 Flash video cost here?

Per second of duration: 24 credits for text, image, or image-reference generations, and 32 credits per second when a reference video or a video-edit source is involved. A 5-second text-to-video is 120 credits.

## Can I turn an image or an existing video into a clip?

Yes — one image becomes a first-frame image-to-video; two to ten images or one to five reference videos become a reference generation; one video up to 100 MB becomes a video-edit billed on its own duration.

## How long and what resolution are the videos?

Three to twenty seconds, 720p, in 16:9, 9:16, 1:1, 21:9, or auto aspect ratio.

## Is there an API?

Yes — Developers → API Keys, model id `kling-4.0-flash`.

## Is this the official Kling AI website?

No. kling40flash.com is an independent third-party service and is not affiliated with or endorsed by Kling AI or Kuaishou Technology.

Source: https://kling40flash.com