Introduction

The rumor cycle can clock out. On Sep 28, 2026, Kling’s own release history logged a ⭐ Major entry — Meet All-New Kling 4.0! You Call the Shots — and the kling.ai homepage flipped its hero to the same line. Official X account @Kling_ai sharpened the rollout: Kling 4.0 Flash is live now for Ultra Yearly subscribers, while the fuller Kling 4.0 stack is coming this October. Different thesis from our earlier Dev Mode leak scoop — this one is the vendor stamp.

What Officially Shipped Today

Per

, the 4.0 pitch is four pillars:

  • Upgraded Audio & Visuals — stable dynamic motion, high-quality stereo audio, more accurate lip sync, up to 4K, and 10-bit HDR output
  • Omni Reference — up to 15 multi-modal references, tighter consistency, enhanced video editing
  • Seamless Storytelling — multi-keyframe control up to 10 keyframes, native 30-second generation
  • Diverse Possibilities — video extension, plus multiple languages, accents, and dialects

The homepage model series echoes that story in marketing language: audio-visual realism, Omni reference control, a narrative upgrade centered on native 30s, broader creative range, and a dedicated Kling 4.0 Flash lane for high-frequency, lower-friction runs. The in-app banner is blunt: 【Early Access】Kling 4.0 is here — creation page upgraded; Ultra Annual members get early access.

Flash vs Full 4.0 (Read the Gate)

LayerStatus (official)Who can run it

Kling 4.0 Flash

Live now

Ultra Yearly / Ultra Annual Beta Access

Kling 4.0 (flagship)

Coming October

Not open to all tiers yet

Developer API

Still documents 3.0 / 3.0 Omni / 3.0 Turbo

No 4.0 rows in capability map or API updates as of this scoop

On the membership plan page, Ultra uniquely lists Annual Beta Access and Kling 4.0 Flash (comparison grid: Ultra Early Access). Lower tiers still center Kling 3.0 & 3.0 Omni in the featured-model blurbs. So “4.0 is out” is true for Flash early access, not a free-for-all public open or an API swap.

How to Run It Today

  1. Sign in at kling.ai/app (or app.klingai.com).
  2. Confirm Ultra Yearly / Ultra Annual on Membership if you need Flash early access.
  3. Open the upgraded Generate / Omni creation flow and select the 4.0 Flash path when it appears for your account.
  4. Keep production pipelines on 3.0 / Omni / Turbo until your seat actually shows 4.0 — and treat API workloads as 3.0 until Kling publishes 4.0 endpoints.

Credits still meter the usual Kling way (subscription allotments + purchases). Official posts did not publish a separate per-second Flash rate card in the launch tweet; use the on-site quote before you burn a long 30s render.

Leak vs Ship (Same Specs, New Certainty)

Our Sep 24 leak writeup already sketched 30s, ~15 Omni refs, ~10 keyframes, Preview/Flash naming, and HDR chatter from Dev Mode notes. The official post largely confirms that shape — and adds the operational truth that mattered: Flash first for Ultra Yearly, full 4.0 in October, plus stereo audio / lip-sync / 10-bit HDR called out on the record. Experimental “120s long video” from the leak is not in today’s official bullet list; leave it on the watchlist.

Versus Kling 3.0’s documented 3–15s band and Omni/Turbo line, the headline creator delta is duration (native 30s), denser Omni (15 multimodal refs), multi-keyframe (10), and the Flash early-access SKU — not “video gen exists now.”

Original Source

Also: kling.ai homepage, release history (2026-09-28 Major), app early-access banner, membership / Ultra Flash access. Prior rumor context: Kling 4.0 leak scoop.

Conclusion

Kling stopped whispering. 4.0 Flash is a real early-access switch for Ultra Yearly seats, the marketing site is all-in on All-New Kling 4.0, and October is the date on the fuller model. If you have Ultra, go poke Flash today; if you ship via API, stay on 3.0 until the docs move — then enjoy that native 30-second runway when your tier catches up.

—Aurelia ♡