Conclusion first: Kling 4.0 is confirmed, not rumored. Kuaishou announced it on September 28, 2026 — the full model ships in October with native 30-second generation, up to 10 keyframes, and 4K/10-bit HDR output, and Kling 4.0 Flash is in limited early access now for Ultra Yearly subscribers. No price, API, or exact launch day has been published yet. Here is what is confirmed, what is still unconfirmed, and how to prepare your pipeline so you're ready on day one.
Quick Answer
Kling 4.0 launches in October 2026 (no exact date announced). Kling 4.0 Flash went live September 28, 2026, for Ultra Yearly subscribers only. Confirmed headline specs: native 30-second clips, up to 10 keyframes, up to 15 multi-modal references, 4K and 1080p output with 10-bit HDR, stereo audio, and improved lip sync. No pricing or API model has been published for either tier.
Verify it yourself: open Kling's model selector. If 4.0 or 4.0 Flash isn't listed in your account, access hasn't reached you yet.
- Kling 4.0 Flash: available now, Ultra Yearly only, staged rollout.
- Full Kling 4.0: October 2026, date TBA.
- No price change announced. API price table still lists 3.0-era models.
The Official Kling Release Timeline
| Date | Event |
|---|---|
| Feb 5, 2026 | Kling 3.0 launches: 3–15s clips, native audio, 2K output |
| Mar 4, 2026 | Motion Control adds multi-keyframe control |
| Apr 23, 2026 | Native 4K output arrives |
| Jun 17, 2026 | 3.0 Turbo + 3.0 Omni upgrade (3–15s video I/O) |
| Sep 24, 2026 | Dev-mode screenshots leak "VIDEO 4.0 Preview" and "4.0 Flash Preview" |
| Sep 28, 2026 | Official announcement: 4.0 "coming this October"; Flash early access begins |
| Oct 2026 (TBA) | Kling 4.0 general release — date and pricing pending |
What Kling Announced on September 28
At 15:38 UTC, Kling AI posted on X: "Kling 4.0 is coming this October" and "Kling 4.0 Flash is live now for Ultra Yearly subscribers." The accompanying announcement groups the changes into audio/visuals, references, storytelling, and languages. The Sept 24 leak predicted nearly all of it — the 4.0 Preview and Flash brief that surfaced on Dev Mode Discord were accurate, though September 24 is now historical context, not a release date.
What the announcement confirms for Kling 4.0:
| Capability | Announced |
|---|---|
| Max native clip | up to 30 seconds |
| Keyframe control | up to 10 per clip |
| Multi-modal references | up to 15 (split: 10 images + 5 videos + 7 subjects) * |
| Output | 4K + 1080p, 10-bit HDR |
| Audio | stereo, improved lip sync |
| Prompt length | up to 8,000 tokens * |
| Video editing / extension | multi-clip editing; extension timing TBA * |
| Languages | multi-language, accents and dialects |
From access materials and pre-release documentation; treat exact limits as provisional until the public spec lands.
On Flash, the official release note describes early access starting September 28 for "a limited group of users" — a subscription makes you eligible, but the account must actually show the model in its selector.
Pre-release interfaces describe Flash at 720p with SDR color, no keyframes, and shorter clips. Because official Flash limits have not been published, treat every number you see for Flash as provisional.
What We Still Don't Know
- Exact release date. October, with no day named.
- Pricing. No figure for 4.0 and no word on per-clip credit changes.
- API access. No model ID or rate for 4.0 or 4.0 Flash; Kling's price table still lists 3.0-era entries.
- Benchmarks. No independent comparison against other video models yet.
- Flash limits. Duration, resolution, and credit rates diverges across pre-release interfaces — no official spec.
- Third-party availability. Kling 4.0 on Pixmax and other platforms depends on each provider's rollout timeline.
Everything in that list is something a copy-paste "Kling 4.0 specs" article will get wrong over the next two weeks. Getting the confirmed vs. provisional split right is the entire value of this page.
What to Use Until Kling 4.0 Ships
Do not pause production for a model with a floating release date. Run your current pipeline, and structure your projects so they lift straight into 4.0 when it lands.
Ship on Kling 3.0
Kling 3.0 is production-ready today, with Turbo speeds and Omni mode. Keep delivering with it, and standardize on the version you reference so your project files stay clean. Run 3.0 jobs through Pixmax's unified editor — the same Kling project on Pixmax pushes to whatever model and settings you select, which makes the 4.0 swap a settings change, not a rebuild.
Two 3.0 gotchas worth remembering: credits are consumed on trim (not on generate), and motion reference needs a real object that moves. Both carry into 4.0 workflows.
Build 4.0-Ready Assets Now
The 4.0 feature list — 10 keyframes, 15 references, voice and subject reuse — only pays off if your assets are built for it. Use the window before October to shoot and organize the inputs that the release checklist demands:
| Asset | Why It's 4.0-Ready |
|---|---|
| Character angle set (3 views + close-up) | Feeds the up-to-10 image reference slots for consistent faces |
| Elements library | Clean subjects to drop into Omni Reference's 15-slot budget |
| Voice samples | Ready for improved audio and accurate lip sync on release |
| Keyframe shot list (6 key beats) | Designed to map onto multi-keyframe timelines per clip |
| Model-agnostic originals | Shot without 4.0-specific quirks so they run on any model |
Production systems that publish on a schedule should also lock their next month of briefs now. For a structure that scales, start with a strong storyboard brief before committing to a model.
Hedge with a Second Model
A release month with no date is a scheduling risk. If a deadline is involved, don't block it behind one announcement. Seedance 2.5 and MiniMax's H3 both do long-form and reference-heavy work today, and follow the same project format in Pixmax, so a fallback render costs an export, not a rewrite. Build a proof-of-concept with a cinematic pipeline that runs on whatever model your deadline gets.
FAQs
When is the Kling 4.0 release date?
October 2026, with no specific day announced. Flash early access began September 28, 2026.
What is Kling 4.0 Flash?
An early-access tier of the 4.0 line. It's live now for Ultra Yearly subscribers at lower specs (720p/SDR per pre-release info) while the full model launches in October.
How do I get Kling 4.0 Flash?
Be an Ultra Yearly subscriber — then check your model selector. The official rollout is staged, so the subscription is necessary but not automatically sufficient.
How much will Kling 4.0 cost?
Unknown. No price has been published, and Kling hasn't said whether per-clip credits change.
Is Kling 4.0 available through the API?
Not yet. Kling's API price table still lists 3.0-era models only.
How does Kling 4.0 compare to Kling 3.0?
Kling 3.0 generates 3–15 seconds. Kling 4.0 doubles the ceiling to 30 seconds, adds up to 10 keyframes per clip, up to 15 multi-modal references, and 10-bit HDR output.
Can I use Kling 4.0 on Pixmax?
Pixmax currently serves Kling 3.0 through its unified editor, where 4.0 will land once the provider enables it. Watch the Kling model page rather than the blog for availability.
Should I wait for Kling 4.0 instead of producing now?
No. If your project survives its deadline, it shouldn't wait on an unannounced date. Prep 4.0-ready assets and ship on 3.0 in the meantime.
Bottom Line
Kling 4.0 is confirmed for October 2026, with Flash already live for Ultra Yearly subscribers. The confirmed headline specs — 30-second native clips, 10 keyframes, 15 references, 4K with 10-bit HDR — reshape how much you can put in a single prompt, but price, API, and launch day remain unannounced.
Until they land, your edge isn't waiting for the model — it's having the character sets, keyframe shot lists, and reference libraries built and ready to run. As usual, the community early-adopter threads on r/KlingAI_Videos are testing limits ahead of the docs — worth watching before you wire production around a specific number.
Last verified: September 30, 2026.
