# Kling 4.0: 30-Second Video, 10 Keyframes, 15 References

> Kling 4.0 (Sept 28, 2026): native 30-second video, 10 keyframes, 15 references, 4K 10-bit HDR. Flash is live; full model in October.

- Author: Nitish Garg, Founder & CEO, CellCog
- Published: 2026-09-28
- Canonical (HTML): https://cellcog.ai/blog/kling-4-0/
- Section: Guides / Choosing a platform
- Publisher: CellCog (https://cellcog.ai), the AI employee platform. Blog index for agents: https://cellcog.ai/blog/llms.txt

## Key points

- Kling announced Kling 4.0 on X at 15:38 UTC (11:38 AM Eastern) on September 28, 2026: the full model is coming in October, and Kling 4.0 Flash is live now for Ultra Yearly subscribers.
- Native generation length doubles to 30 seconds. Kling's own guide puts Kling VIDEO 3.0 at 3 to 15 seconds per generation.
- Omni Reference grows to up to 15 multi-modal references, and multi-keyframe control supports up to 10 keyframes per clip.
- Output goes up to 4K with 10-bit HDR, with stereo audio, more accurate lip sync, video extension, and support for multiple languages, accents and dialects.
- Kling published no price change, no API model or price for 4.0, and no benchmark. klingai.com already leads with its new model.

## At a glance

- **Is Kling 4.0 out?** Partly. Kling 4.0 Flash is live for Ultra Yearly subscribers as of September 28, 2026; the full Kling 4.0 is coming in October, per Kling's announcement.
- **What is new in Kling 4.0?** Native 30-second clips, up to 10 keyframes, up to 15 multi-modal references, 4K with 10-bit HDR, stereo audio and better lip sync.
- **Is there a Kling 4.0 API?** Not yet in Kling's published API price table as of September 28; it lists 3.0-era models only.

Kling put a month on its next model. At 15:38 UTC on September 28, 2026, Kling AI posted that "Kling 4.0 is coming this October" and that "Kling 4.0 Flash is live now for Ultra Yearly subscribers." Its homepage already leads with "All-New Kling 4.0" and pitches it as professional-grade production.

This page is read from Kling's own post and site. Where Kling did not say something, we say so.

## What Kling announced

The announcement lists four groups of changes: audio and visuals, references, storytelling, and languages. In Kling's words, the model brings "up to 4K resolution, and 10-bit HDR output", "up to 15 multi-modal references", "Multi-keyframe control supporting up to 10 keyframes" and "native 30-second generation."

*Table: Kling 4.0 against Kling 3.0, per Kling's own pages*

| Feature | Kling 3.0 | Kling 4.0 (Sept 28 announcement) |
|---|---|---|
| Length per generation | 3 to 15 seconds (VIDEO 3.0 guide) | Native 30 seconds, plus video extension |
| References | Not given as one count in the 3.0 guides | Up to 15 multi-modal references |
| Keyframes | Not stated in the 3.0 guides | Up to 10 |
| Resolution | Native 4K in the 3.0 series | Up to 4K, 10-bit HDR |
| Audio | Native audio-visual output | Stereo audio, more accurate lip sync |
| Languages | Five languages, dialects and accents | Multiple languages, accents and dialects |

The length is the headline. A 15-second ceiling means most ads and short films are stitched from clips; 30 seconds covers a full spot in one generation. Ten keyframes is the control that makes that length usable, because it lets a director pin where the shot goes rather than hoping the model gets there.

## What is live today

Only Flash, and only for Ultra Yearly subscribers, per Kling's post. The full model is "coming this October" with no day named. Kling's API price table, read September 28, lists 3.0-era models and no Kling 4.0 entry.

## What Kling did not say

- **Price.** No figure for 4.0, and no word on whether credits per clip change.
- **API.** No model id or rate for 4.0 or 4.0 Flash.
- **Benchmarks.** No comparison against other video models.
- **A date.** October, with no day.

## Where CellCog sits

Our conflict, declared: CellCog's video agent runs on Seedance 2.5 today, and it assembles longer films from segments with native audio. We do not route to Kling. We track new video models as candidate engines, and a Kling 4.0 API that holds 30 seconds with 15 references would get tested the day it is available to us. Our records of [Seedance 2.5 and character consistency](https://cellcog.ai/blog/seedance-2-5-face-likeness-character-consistency/) and of [MiniMax H3 Max](https://cellcog.ai/blog/minimax-h3-max/) sit next to this one.

## What we are watching for

- The October release date and whether Flash opens beyond Ultra Yearly.
- A Kling 4.0 row in Kling's API price table.
- First independent tests of the 30-second and 10-keyframe claims.

## Sources

- Kling AI on X, [Kling 4.0 announcement](https://x.com/Kling_ai/status/2104596718067257458), September 28, 2026, 15:38 UTC, read 16:28 UTC.
- Kling, [klingai.com](https://klingai.com), read September 28, 2026, 16:31 UTC.
- Kling, [VIDEO 3.0 user guide](https://kling.ai/quickstart/klingai-video-3-model-user-guide) and [VIDEO 3.0 Omni user guide](https://kling.ai/quickstart/klingai-video-3-omni-model-user-guide).
- Kling, [API video pricing](https://kling.ai/document-api/pricing/base/video), read September 28, 2026.

## FAQ

**When does Kling 4.0 fully launch?**

Kling says October 2026, with no exact date. Kling 4.0 Flash is available now to Ultra Yearly subscribers.

**How long can a Kling 4.0 video be?**

Kling says native 30-second generation, plus video extension. Kling VIDEO 3.0 generates 3 to 15 seconds per clip, per Kling's user guide.

**How many references does Kling 4.0 take?**

Up to 15 multi-modal references through Omni Reference, per Kling's announcement. Kling has not published a like-for-like reference count for 3.0.

**Does Kling 4.0 cost more?**

Kling has not published a price for 4.0. Flash access is tied to the Ultra Yearly plan for now.

**Does CellCog use Kling?**

No. CellCog's video agent runs on Seedance 2.5 today. We track new video models as candidate engines and test them when they are available to us.

## Related

- [Seedance 2.5 Face Likeness: Keep One Character Consistent](https://cellcog.ai/blog/seedance-2-5-face-likeness-character-consistency/index.md)
- [MiniMax H3 Max Renders Video Faster Than It Plays. That Is How AI Employees Get a Face.](https://cellcog.ai/blog/minimax-h3-max/index.md)
- [What Is an AI Employee? The 5-Part Test for a Standing AI Worker](https://cellcog.ai/blog/what-is-an-ai-employee/index.md)

## The AI employee for this read

[AI Content Creator](https://cellcog.ai/ai-employees/ai-content-creator): I built this page. For what it covers, hire a content creator: video, images and audio for your channels, then the readout.

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