Kling 4.0 Flash: Early Access from Sept 28, Who Gets It
Kling 4.0 Flash launched Sept 28, 2026 in early access for Ultra plan subscribers. 720p, up to 20s clips, ahead of full Kling 4.0 in October.
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Kling 4.0 Flash is a faster, lighter version of Kling’s new video model, released in early access on September 28, 2026, ahead of the full Kling 4.0 launch in October. It generates clips from 3 to 20 seconds in 720p, from text, image, and reference inputs. We checked the pricing to see who got access and looked at the API to see if you can run it outside the app. We did not test Flash itself, as we don’t have access to it.
Summary
Kling 4.0 Flash was initially given only to selected users, and Kling AI’s pricing page from September 28, 2026 assigns early access exclusively to the Ultra plan (159.99 USD per month, excluding VAT). Flash offers 720p, 8-bit output and up to 20 seconds, less than the full 4.0 (up to 30s, up to 4K). It’s not available on OpenRouter or fal.ai. Who it’s for: people already paying for Ultra who make lots of short clips for social media. Who it’s not for: if you need 1080p, keyframes, or you’re on a lower plan, wait for October. This is our opinion.
What Kling 4.0 Flash is
Kling 4.0 Flash is a variant of Kling 4.0 that the maker describes as a model “for frequent creation”: fast, with reliable quality and good value. In the official release note it has a separate, short parameter table, and its launch precedes the full model by several weeks.
The note doesn’t say how much faster Flash is or what it costs in credits. There are also no quality comparisons with the full 4.0 or with Kling 3.0. Everything below comes from the maker’s parameter table, not our measurements. We covered the overall picture of the new generation in our guide to Kling 4.0.
Who got early access
The note only mentions a “limited group of users” from September 28, 2026. The specific plan is visible only in the pricing: the Ultra plan has an “Ultra Early Access” badge and a “Kling 4.0 Flash” entry, and in the comparison table the Kling 4.0 Flash row shows dashes for Standard, Pro, and Premier plans and “Ultra Early Access” only for Ultra.
| Ultra Plan | USD (excl. VAT) |
|---|---|
| First month (approx. 29% discount) | 127.99 |
| Each subsequent month | 159.99 |
| Annual prepay | 1429.99 |
| Credits | 26,000 per month, 100 credits for 0.49 USD with monthly billing |
The pricing page without login didn’t show the per-second Flash cost in credits, so we can’t tell you how many clips fit in 26,000 credits. The note doesn’t say whether Flash will come to cheaper plans after launch. We broke down the rest of the plans in our article on how much Kling costs.
How Flash differs from full Kling 4.0
| Feature | Kling 4.0 Flash | Kling 4.0 | Kling 3.0 |
|---|---|---|---|
| Available | from Sept 28, 2026, Ultra | October 2026 | yes, also in API |
| Text and image to video | yes | yes | yes |
| Omni Reference | yes | yes | in 3.0 Omni version |
| Keyframes | table doesn’t list them | up to 10 | first and last |
| Length | 3-20 s | 3-30 s | 3-15 s |
| Resolution | 720p | 720p, 1080p, 4K | 720p, 1080p |
| Output | 8-bit SDR | 10-bit HDR (coming soon) | - |
The table leads to a simple conclusion: Flash is a model for drafts and social media content, where 720p is enough and 20 seconds is more than a typical reel. For 4K advertising or film with planned keyframes, you’ll need the full 4.0. This is our opinion based on the specs, not testing.
Official Kling 4.0 Flash examples
The note includes two examples labeled as Flash, both from reference images. The videos are on Kling’s site, so the card below links to them, next to Kling’s official creator compilation on YouTube.
Technical note: the file for the second example, downloaded from the note, is 1920×1080 pixels, even though the table lists only 720p for Flash. We don’t know if this is upscaling for presentation purposes or a different configuration, so we’re not drawing conclusions from it. The first example has 1280×720, consistent with the table.
Is Kling 4.0 Flash available in API
No. On September 28, 2026 we checked the video model list on OpenRouter (29 models) and all fal.ai endpoints (1502, including 60 with Kling in the name). Only Kling versions up to 3.0 are there, including 3.0 Turbo and 3.0 Omni. If you want to compare Kling with other models in API today, check out our AI video generator ranking.
Frequently asked questions
When did Kling 4.0 Flash launch?
September 28, 2026, in early access for a limited group of users. Full Kling 4.0 is scheduled to launch in October 2026.
Who has access to Kling 4.0 Flash?
According to Kling AI’s pricing page from September 28, 2026, early access is for the Ultra plan. Flash was not available in Standard, Pro, or Premier plans at that time.
How much does Kling 4.0 Flash cost?
The Ultra plan costs 159.99 USD per month (excluding VAT), first month 127.99 USD. The cost of one Flash clip in credits was not publicly disclosed.
What’s the difference between Kling 4.0 Flash and Kling 4.0?
Flash makes up to 20 seconds in 720p and 8-bit SDR, full 4.0 makes up to 30 seconds in 720p, 1080p, or 4K with 10-bit HDR. The Flash table also doesn’t mention keyframes.
Sources and verification date
- Kling AI: Kling 4.0 release note (Sept 28
- 2026)
- Kling AI: plans and pricing (checked Sept 28
- 2026)
- OpenRouter: video model list
- fal.ai: model catalog. Verified September 28
- 2026
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