Kling 4.0 Release Date: What's Confirmed, What's Rumoured (October 2026)

October 13, 2026 · 8 min read

As of October 13, 2026, Kling 4.0 has not been fully released — Kuaishou announced the model on September 28, 2026 and committed to an October 2026 launch window, with only the faster Kling 4.0 Flash variant in limited early access so far. No exact day, no public API pricing yet. That's the short answer for the search that brought you here; the longer answer is more useful, because Kuaishou has already published an unusually detailed spec sheet. Here's what is actually confirmed, what is still rumour, and what to create with while you wait.

What is confirmed — and what is not

The confirmation came from Kuaishou itself: a release note titled "Meet All-New Kling 4.0!" published on the official Kling AI site on September 28, 2026, followed by a spec table and a batch of showcase clips. This is not a leak cycle — the model exists, has a name, and has a launch month. What Kuaishou has confirmed so far:

• 3 to 30 second generations in a single pass — double the ceiling of most current flagships, pitched as room for unbroken takes.
• Up to 10 keyframe images steering one generation, so a clip can be directed beat by beat rather than prompted and hoped for.
• Omni Reference: up to 15 references in one request — as many as 10 images, 5 video clips, 7 elements — including subjects that carry a specified voice.
• Output up to 4K with two-channel stereo sound, a new 21:9 ultrawide aspect ratio, on-screen text in eight-plus languages, and prompts up to 8,000 tokens.
• Kling 4.0 Flash: a faster, cheaper variant capped at 20 seconds and 720p, in limited early access since September 28.

Two announced features are explicitly labelled "coming soon" rather than shipping: 10-bit HDR output at 1080p and 4K, and video extension (upload a clip, extend it repeatedly, up to a 2-minute cap). Everything else — the exact October launch day, what the API will cost, whether Flash access widens before the full launch — is unannounced. Any page quoting you a specific day or a price list for Kling 4.0 today is guessing.

What 4.0 changes versus 3.0 in practice

Spec sheets are abstract; the practical shifts are easier to picture. On Kling 3.0, a directed scene means generating a clip per beat and cutting them together in an editor, because one generation tops out around 15 seconds and takes a start and end frame at most. On 4.0's published spec, the same scene is one 30-second generation with keyframes marking each beat — the character's state, a scene change, a camera move — and a prompt long enough to describe all of it (the input limit jumps to 8,000 tokens). Reference work changes the same way: where 3.0-era tools take a handful of images, Omni Reference combines stills, clips, a voice and elements — up to 15 inputs — in a single request, which is what makes multi-character scenes with consistent faces plausible without a training step.

The catch is equally practical. Longer generations mean each failed render costs more time and credits than a 5-second draft, and every reference clip counts against a 30-second combined input budget — so cutting source footage down becomes part of the workflow. And the two features with the most production value, 10-bit HDR and extension to 2 minutes, are the two that won't necessarily be there on day one.

Kling's release cadence so far

Kuaishou has shipped on a fast drumbeat since the first public beta, which is why an October launch two years and four major versions in is credible rather than optimistic. The history, from Kuaishou's own release notes and contemporary coverage:

Two patterns matter for reading the 4.0 launch. First, Kuaishou staggers: a major version lands, then Turbo and specialised variants follow over the next weeks and months — so "Kling 4.0 is out" will likely mean a sequence of endpoints, not one switch. Second, the gap between 3.0 (January 2026) and 4.0 (October 2026) is the longest the line has had, which tracks with how much the spec sheet claims to change at once.

What to watch for as the launch lands

• The exact day. "October 2026" is the only official window. Historically Kuaishou announces and flips access within days, so the release-note page and Kling's X account are the two sources worth watching — not aggregator blogs.
• API and platform availability. Access at launch will be through kling.ai first; API platforms like fal have said Kling 4.0 will arrive through the same endpoints that already run Kling 3.0, but endpoint names and pricing only go up when it goes live.
• Pricing. Nothing published yet. A 30-second 4K clip is a much bigger render than a 10-second 1080p one, so expect the long-take and 4K tiers to cost meaningfully more than 3.0 equivalents.
• Whether the "coming soon" rows ship on day one. 10-bit HDR and video extension are the two to verify before planning a production around them.
• Independent testing. Showcase clips are curated. The first honest signal will be leaderboard placements and side-by-side tests against Kling 3.0, Veo 3.1 and Seedance 2.5 in the days after release.

What to use while you wait

You don't have to wait. Kling 3.0 — the current full generation, with the Turbo variant alongside it — is the motion-realism benchmark of this model cycle, and it's available today. On Hermosso, Kling 3 and Kling 3 Turbo sit in the video tools' engine picker next to Seedance 2.5, Veo 3.1, Hailuo H3 Max, Runway Gen-4.5 and the rest: open Photo to Video to animate a still, or Text to Video to generate from a prompt alone, and run the same input through two or three engines on one credit balance. Photo-to-video costs 100 credits per second at 480p or 200 at 720p, and new accounts get 400 free credits — enough for a first comparison run. Because new flagship models are added to the picker as they release, Kling 4.0 is where you'll find it when it ships.

If it's specifically the motion-transfer side of the Kling line you're watching — 2.6 Motion Control made "put anyone in any clip" a mainstream format last December — that capability is already mature elsewhere: Hermosso's Motion Transfer recasts a reference clip with a person from your photos (one reference photo, up to eight for steadier identity; clips of 4–30 seconds) at 450 credits per second in standard 768P or 700 in pro 1080P. And if you want context on the current generation first: our Kling 3 photo animation guide, the Kling vs Veo vs Seedance comparison, and the Wan 3.0 explainer on Alibaba's omni model cover the field Kling 4.0 is about to enter.

What Kling costs today — and what the alternatives cost

Kling 4.0 pricing doesn't exist yet, so the useful question is what access to this class of model costs right now. As of October 2026, from each vendor's published pricing:

The structural difference to note: Kling AI, Google and Runway each sell a subscription to their own models, while Hermosso's credit balance works across every engine in the picker — so when 4.0 lands, there's no new account or plan to open to benchmark it against what you already use.

When waiting for Kling 4.0 is the wrong move

Honesty section, because watch pages attract waiters. If you have a project this month, waiting is usually the mistake. Kling 3.0 already does 15-second multi-shot clips with sound, and the practical quality gap between flagship generations has narrowed to the point where prompt and reference quality decide more than the version number. Launch-week access will also be crowded, the API price unknown, and the kinks — every major video launch has them — undocumented. The cases where waiting genuinely makes sense are narrow: you specifically need a single take longer than 15 seconds, you need multi-keyframe direction across a scene, or you're evaluating 4K-native output for broadcast delivery. For everything else, make the thing now on 3.0-class engines and re-render the winners on 4.0 when it's live.

A note on this page

This is a watch page: we update it when there's real news — an exact date, pricing, API availability, or the model landing in Hermosso's picker — and the modified date at the top tells you when that last happened. Until Kuaishou ships, treat everything beyond the September 28 announcement and spec table as unconfirmed.