Kling 4.0 vs 3.0: What Changed and What a Video Costs (Prices Read 16 Oct 2026)

Kling 4.0, Kuaishou's new video model, officially launched on 2026-10-15 with up to 30 seconds of native generation, 10-bit HDR output and deeper reference control — but its API is not open yet, and third-party platforms still list Kling 3.0 as their newest version. Every spec and price below was read on the source's own page on 2026-10-16; where a page doesn't state something, we say so instead of borrowing a number from elsewhere. This article covers what actually changed from 3.0, where you can run 4.0 today, and what a video costs in dollars.

Quick answers

• Launch date: Kling 4.0 went live on 2026-10-15, per Kling's launch reporting covered by Sina Tech; the lightweight Kling 4.0 Flash opened to small-scale testing earlier, on 2026-09-28 (both read 2026-10-16).
• The three headline changes: up to 30 seconds in one native generation (long takes), up to 10-bit HDR output with 4K / 1080p / 21:9 support, and reference control that accepts up to 15 reference-material combinations plus up to 10 keyframes in one task (guancha.cn; ZOL, read 2026-10-16).
• Can you use it today? On Kling's own app, yes. Via API, no — Kling's developer pricing page still lists only Kling 3.0 and 3.0 Turbo, and the launch coverage describes API access as "coming soon" for enterprise customers and developers (klingai.com/dev; Sina Tech, read 2026-10-16).
• What a video costs: the API bills per second — Kling 3.0 runs $0.084/s (720p, no audio) to $0.42/s (4K), so a 5-second 1080p clip with native audio costs $0.84 (klingai.com/dev, read 2026-10-16). 🔴 Kling 4.0 API pricing is not published yet.
• On aggregators: Viralance, Medeo and fal.ai all still list Kling 3.0 (and older) as their newest Kling — no 4.0 anywhere we checked (read 2026-10-15/16).
• Credits math: Kling's official policy prices credits at $1 = 66 credits, refunds failed generations, and expires purchase credits after 2 years (kling.ai/docs/point-policy, read 2026-10-16).

What is Kling 4.0?

Kling 4.0 is the fourth generation of Kuaishou's Kling video model family, released 2026-10-15 with a stated focus of "real, controllable, professional" output for high-motion, camera-movement-heavy work (Sina Tech, read 2026-10-16). The official homepage markets it as "All-New Kling 4.0 — You call the shots," promising "stable dynamic motions and an immersive audio-visual experience" — but the homepage itself publishes no dates, specs or prices (kling.ai, read 2026-10-16). The specs below come from launch-day reporting and Kling's own developer pages.

Kling 3.0 vs 4.0 Flash vs 4.0: what changed

The three versions get confused constantly, so here they are side by side. Flash is the lightweight build that opened small-scale testing on 2026-09-28, ahead of the full model (IT Home, read 2026-10-16); Kling has not published an itemized Flash-vs-full comparison, so that column stays deliberately thin.

Sources for this table: kling.ai (read 2026-10-16); guancha.cn and ZOL launch reports (read 2026-10-16); app.klingai.com Kling 3.0 Omni guide (read 2026-10-16); klingai.com/dev (read 2026-10-16); IT Home pre-launch report (read 2026-10-16).

The honest summary: 4.0's jump is concentrated in duration (30 seconds native), HDR/ultrawide output, and reference control — while audio was already a 3.0-series feature, and Flash's positioning (fast and cheap, per its "lightweight" label) is not itemized anywhere official we could find.

Where you can run Kling 4.0 today (read 16 Oct 2026)

One day after launch, 4.0 lives on Kling's own platform — everywhere else we checked is still on 3.0 or older.

Not stated = the page doesn't say, and we didn't borrow a number from elsewhere. Kling 4.0 availability moves fast; this row-by-row picture is one day post-launch.

The API is still on 3.0 — and that's where the public prices are

Kling's developer page publishes per-second API pricing in "Units," with 1 Unit = $0.14 list (klingai.com/dev, read 2026-10-16):

Do the multiplication yourself for a real clip: a 5-second 1080p Kling 3.0 video with native audio costs 5 × $0.168 = $0.84; the same at 4K costs 5 × $0.42 = $2.10 (arithmetic on the official rates above). 🔴 None of this pricing covers 4.0 yet — the dev page's video table has no 4.0 row, and Kling's launch statement describes API access as coming later for enterprise customers and developers.

Consumer plans: official page unreadable, secondary source dated

Kling's own pricing page renders client-side and showed no prices when we read it on 2026-10-16, so we will not invent membership numbers. What we can verify is the official credits policy: $1 = 66 credits, failed generations refund credits, purchase credits stay valid for 2 years, regular membership credits expire after 1 month, and daily login credits (subscribers only) reset at 24:00 (kling.ai/docs/point-policy, read 2026-10-16). A third-party guide that read Kling's membership and points pages on 2026-09-09 lists Standard at $8.80/month (660 credits), Pro at $32.56 (3,000), Premier at $80.96 (8,000) and Ultra at $159.99 (26,000) on renewal, with a free tier that carries a mandatory watermark and no 1080p/4K output — treat that as a secondary snapshot, not today's price (createvision.ai, read 2026-10-16).

Where Kling 3.0 still wins today

Price and access, not quality, are 3.0's remaining advantages. Every API platform we checked prices 3.0 publicly — Viralance sells Kling 3.0 Pro 5-second clips for 10 credits (≈$1.81 at its best-value pack rate) — while 4.0 has no published API price at all (viralance.com/pricing; klingai.com/dev, read 2026-10-15/16). If your pipeline runs through fal.ai, Replicate or an aggregator, 3.0 is the newest Kling you can call today (fal.ai; medeo.app; viralance.com, read 2026-10-15/16). And if 30-second HDR long takes aren't what your project needs, paying 4.0-era prices — once they exist — buys you little.

How to try Kling 4.0 today

1. Open Kling's official app. Kling 4.0 is live there with "Create Now" / "Try Now" entry points on the homepage (kling.ai, read 2026-10-16); sign in and pick 4.0 in the model selector.
2. Plan your inputs against the caps. Launch briefs put the single-task ceiling at up to 10 images, 5 videos and 7 subjects, with up to 15 reference-material combinations and 10 keyframes available (IT Home; ZOL, read 2026-10-16).
3. Watch the credit cost before you generate. Credits deduct at generation and refund on failure, at the official rate of $1 = 66 credits — the per-video cost shows in the interface (kling.ai/docs/point-policy, read 2026-10-16).
4. If you need API or batch work, stay on 3.0 for now. The published per-second rates are 3.0-only until Kling opens the 4.0 API (klingai.com/dev, read 2026-10-16).
5. Draft on 3.0, finish on 4.0. Run composition and timing tests through the cheap 3.0 API tiers, then re-render the approved shots on 4.0 in the app for the 30-second HDR pass — the two share the same reference and keyframe concepts, so prompts transfer.

Where people will get stuck: assuming 4.0 is available everywhere because the launch was loud. A day in, it is official-app-only, and every aggregator we checked still tops out at 3.0 — check the model list on your platform before you plan a workflow around 4.0.