Short answer: Yes. Kling 4.0 outputs 720p, 1080p and 4K, and 21:9 is one of its aspect ratios. 10-bit HDR is marked as coming soon in Kling's User Guide, with no published date. Kling 4.0 Flash stays at 720p in 8-bit SDR. On Kling4.tv, 4K is a resolution option for Kling 4.0 in the generator.
Last checked: November 11, 2026 against the Kling 4.0 User Guide and the Kling4.tv generator.
What does Kling 4.0 4K 10-bit HDR actually include?
Kling's 4.0 page says: "Native 4K/1080p 10-bit HDR and 21:9 ultrawide deliver richer color, highlight and shadow detail, with smoother tonal transitions." The page's FAQ adds that "Kling 4.0 supports 10-bit HDR output in both 1080p and 4K." The User Guide, however, still marks 10-bit HDR as coming soon, so treat 4K as available now and HDR as not yet released.
So there are three separate upgrades: resolution (4K as well as 1080p), bit depth (10-bit) and dynamic range (HDR). Kling's 4.0 page describes the 4K as "native," meaning the model outputs it directly, as opposed to a separate upscaling step. The page does not list bitrate, codec or file format for 4K output.
What do 10-bit and HDR mean for creators?
In standard video terms, bit depth is the number of tone steps per color channel. 8-bit video has 256 steps per channel; 10-bit has 1,024. In practice, more steps mean fewer visible bands in skies, smoke, skin and soft studio backgrounds, and more room to push color in an edit before it breaks up.
Keep resolution, bit depth, and delivery requirements separate when reviewing the Kling 4.0 overview for your project.
HDR (high dynamic range) keeps more detail in bright highlights and deep shadows at the same time. Kling AI says the format provides "improved preservation of highlights and shadows, making it suitable for cinematic scenes, high-contrast environments, and commercial video content." Two practical caveats apply to any HDR video: you need an HDR-capable screen to see the difference, and your editing software and export settings must keep the HDR signal, or it will look flat or washed out.
How does Kling 4.0 compare with Kling 4.0 Flash and Kling 3.0 on resolution?
| Kling 4.0 | Kling 4.0 Flash | Kling 3.0 | |
|---|---|---|---|
| Status | Available since October 15, 2026 | Available (opened September 28, 2026) | Available |
| Max resolution | 720p / 1080p / 4K | Up to 720p | 720p, 1080p and 4K |
| Bit depth / dynamic range | 8-bit SDR now; 10-bit HDR marked coming soon | 8-bit SDR | 8-bit SDR |
| Aspect ratios | 21:9, 16:9, 1:1, 9:16, Auto | Not specified | Not compared on Kling's 4.0 page |
| Max length per pass | Up to 30 seconds | Up to 20 seconds | 3 to 15 seconds |
| Keyframes | Up to 10 | No first/last frames or multi-keyframes | Start & End Frames |
Last verified: November 11, 2026.
Flash's strength is speed and value: Kling AI calls it "a lighter, faster way to create" with "fast turnaround and excellent value for everyday creation." Kling 3.0 also lists 4K among its output options, with 3–15 second clips. For what else changes between generations, see Kling 4.0 vs Kling 3.0.
Can you make Kling 4.0 4K videos now?
Yes for 4K, not yet for 10-bit HDR. Kling 4.0 has been available since October 15, 2026 through Kling's web creation interface, MCP and CLI, and its User Guide lists 720p, 1080p and 4K output. 10-bit HDR at 1080p and 4K is still marked as coming soon, with no published date. Kling 4.0 Flash produces "videos up to 20 seconds in a single pass and up to 720p resolution (8-bit SDR)." Our Kling 4.0 Flash guide covers its limits, and our Kling 4.0 release date page tracks the launch timeline.
On Kling4.tv, choose Kling 4.0 in the generator and set the resolution to 4K. Kling 4.0 is open to members on a paid plan or credit pack, and the generator shows the credits for a 4K clip before you submit.
Is there a Kling 4.0 API with 4K output?
Not yet. The Kling 4.0 API has been fully available since October 28, 2026, and the Kling 4.0 Flash API since November 4, 2026. The API outputs 720p and 1080p; 10-bit 4K is marked as coming soon. For 4K today, use Kling 4.0 in a web generator that offers it.
For developer access, see our Kling 4.0 API guide.
How should you plan a Kling 4.0 4K video?
- Choose scenes that benefit: sunsets, neon at night, product shots on glossy surfaces and high-contrast interiors show the gain from higher resolution most clearly, and will gain more once 10-bit HDR arrives.
- Check your delivery platform: confirm that where you post accepts 4K, and plan an HDR version only after HDR output is released.
- Prepare your edit pipeline: use an editor and export settings that keep 4K, so you do not lose detail on export.
- Test short first: render a short 720p draft, then switch to 4K for the final take, because 4K costs more credits.
Kling 4.0 4K and HDR FAQ
Does Kling 4.0 support 4K?
Yes. Kling 4.0 outputs 720p, 1080p and 4K, according to Kling's User Guide. 10-bit HDR is still marked as coming soon, with no published date.
Is Kling 4.0 Flash 4K?
No. Kling 4.0 Flash goes up to 720p in 8-bit SDR, with videos up to 20 seconds per pass, according to the FAQ on Kling's 4.0 page.
What is the difference between 8-bit SDR and 10-bit HDR in AI video?
10-bit HDR has 1,024 tone steps per color channel instead of 256, plus a wider brightness range. That means smoother gradients, less banding and more detail in highlights and shadows, and more room for color grading.
Do I need an HDR screen to see Kling 4.0 HDR?
Yes, to see the full effect. On a standard SDR display or in an app that does not support HDR playback, HDR video is shown tone-mapped and loses part of its range.
When will Kling 4.0 10-bit HDR be released?
No date has been published. Kling 4.0 with 4K output has been available since October 15, 2026; 10-bit HDR at 1080p and 4K is still marked as coming soon in Kling's User Guide.
Try Kling AI Today
Ready to experience the next generation of AI video creation? Explore Kling 4.0 and see the difference for yourself.