# Kling40Flash

> kling40flash.com is an AI video studio built around the Kling 4.0 Flash model (model id `kling-4.0-flash`). It generates 3–20 second 720p clips from a text prompt, an image, reference images/videos, or an edited source video, billed per second through plans and credits.

kling40flash.com is an independent service and is not affiliated with or endorsed by Kling AI or Kuaishou Technology. Kling is a trademark of its respective owner.

## What this site is

kling40flash.com is an AI video studio built around the Kling 4.0 Flash model (model id `kling-4.0-flash`). It generates 3–20 second 720p clips from a text prompt, an image, reference images/videos, or an edited source video, billed per second through plans and credits.

## Key facts

- The studio runs one model, Kling 4.0 Flash (`kling-4.0-flash`), and produces 3–20 second videos at 720p.
- Four modes are inferred from the uploaded media: text-to-video (prompt only), image-to-video (one image as the first frame), reference-to-video (2–10 images or 1–5 reference videos, or a prompt that mentions @Video1), and video-edit (one source video up to 100 MB).
- Videos are billed per second of duration: text / image / image-reference seconds cost 24 credits, and seconds that involve a reference video or a video-edit source cost 32 credits; video-edit bills on the source duration rounded up, 3–20 seconds.
- Aspect ratios are 16:9, 9:16, 1:1, 21:9, or auto; prompts have a character cap; up to 10 images and 5 reference videos per task, videos up to 100 MB.
- New accounts get free credits enough for one 5-second text-to-video; failed generations are automatically refunded.
- Generation is available without a Kling AI account; the site is an independent third-party service.
- Support: support@kling40flash.com

## Product

- [Kling 4 Flash Generator](https://kling40flash.com/)
- [Pricing](https://kling40flash.com/pricing)
- [Video studio](https://kling40flash.com/dashboard/ai-video/home): sign-in required

## Legal

- [Privacy Policy](https://kling40flash.com/privacy)
- [Terms of Service](https://kling40flash.com/terms)
- [Refund Policy](https://kling40flash.com/refund)
- [Disclaimer](https://kling40flash.com/disclaimer)

## Pricing

Current plans, credit packs, and per-generation credit costs are listed at https://kling40flash.com/pricing. Check that page for exact numbers; this file does not list prices.

- [Pricing](https://kling40flash.com/pricing)

## Frequently asked questions

### 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.

Languages: English has no URL prefix. Other locales use `/zh`, `/ru`, `/de`, `/fr`, `/ja`, `/ko`, `/es`, `/pt`, `/tr`.