Kling 4.0 Release: 30s Clips, 10 Keyframes, Pricing

Breaking Down the Kling 4.0 Rollout: 30-Second Clips, 10 Keyframes, and 15 Credits per Second

Kling 4.0 went fully live on October 15, 2026, 17 days after Kuaishou's Kling AI first announced it on September 28. The full launch came with no system card, no benchmark table, and no developer API. The clearest picture comes from scattered sources: a short official announcement, a few beta testers, and Chinese-language reporting with per-second pricing. This piece pulls those sources together and separates what shipped from what is still marked "coming soon."

TLDR Kling 4.0 doubles single-pass clip length from 15 to 30 seconds and adds up to 10 keyframes. Its Omni Reference accepts up to 15 multimodal references, and the model can be called through MCP and a CLI. Reported pricing is 15 credits per second at 1080p and 10 credits per second at 720p, so one 30-second 1080p clip costs 450 credits. The headline 10-bit HDR output, 2-minute video extension, and developer API have not shipped yet, and no standardized benchmarks exist.

Key Takeaways

• 30 seconds per pass: Kling 4.0 generates up to 30 seconds natively, double Kling 3.0's 15-second ceiling.
• 10 keyframes and 15 references: Multi-Keyframe Control and Omni Reference are the main creative-control upgrades.
• 450 credits per 30-second 1080p clip: that's roughly 16 yuan at one tester's membership rate, before any rerolls.
• Agent hooks: MCP and CLI support make Kling 4.0 scriptable from agent and terminal workflows.
• Not shipped yet: 10-bit HDR, 2-minute extension, and the developer API are all still pending. 4K is not new, since Kling 3.0 already supported it.
• No benchmarks: every Seedance 2.5 comparison so far is a subjective visual A/B test.

What Actually Shipped on October 15

The official baseline is Kling AI's September 28 announcement on X, mirrored in the 23-second "Meet KLING 4.0 | You Call the Shots" video, which had about 149K views two weeks after posting. It promised an October release and listed four upgrade areas: audio/visuals, Omni Reference, storytelling controls, and language support.

The launch-day specs come mostly from two posts. @Chinazhidx summarized the full release with numbers. @0xLogicrw's longer writeup added comparisons with Kling 3.0 and a hands-on cost test.

Spec	Kling 4.0 (as reported)	Source
Max clip length (single pass)	30 seconds (Kling 3.0: 15 seconds)	@0xLogicrw, @Chinazhidx
Keyframes	Up to 10	Official announcement, @Chinazhidx
Omni Reference inputs	Up to 15 (images, videos, character subjects)	Official announcement, @0xLogicrw
Prompt length	Up to 8,000 tokens	@Chinazhidx
Resolutions live at launch	720p, 1080p	@Chinazhidx pricing tiers
Agent access	MCP + CLI	@Chinazhidx, @0xLogicrw
10-bit HDR	Coming soon	@Chinazhidx, @0xLogicrw
Developer API	Coming soon	@Chinazhidx, @0xLogicrw

Five capability names recur across the official copy and community posts. They are worth defining precisely, because readers will see them repeated elsewhere.

Native 30-Second Generation is Kling 4.0's ability to produce a clip of up to 30 seconds in one pass, without stitching shorter segments together.

Multi-Keyframe Control lets creators pin up to 10 frames along the timeline to dictate character actions, scene changes, and camera rhythm. One community post described the layout as a start frame, eight mid-frames, and an end frame. Kling has not confirmed that breakdown.

Omni Reference is Kling 4.0's multimodal reference system. It combines up to 15 images, videos, and character subjects in a single generation. According to @0xLogicrw, it can borrow the camera movement and motion of an existing video and swap in different characters, products, or backgrounds.

Kling 4.0 Flash is the lighter tier that went live in late September for Ultra Yearly subscribers. Beta testers reported it was capped at 720p and 20 seconds.

Agent-Driven Workflows refers to MCP and CLI access to Kling 4.0, which lets AI agents generate clips and batch-produce assets without the web UI.

The Rollout Timeline: From Flash Preview to Full Release

The launch happened in two stages. That matters because many "Kling 4.0 is here" posts from late September were really describing Flash.

Date (2026)	Event	Source
Sep 28	Official announcement; Flash live for Ultra Yearly subscribers	Kling AI on X
Sep 28	Beta tester reports Kling 4.0 at 720p/1080p for 3–30 s, Flash at 720p for 3–20 s	@seiiiiiiiiiiru
Sep 28	Trade coverage frames it as Kuaishou's spinoff "chasing ByteDance"	@AGTPinsights
Oct 15	Full availability to all users	@0xLogicrw

During the gap, early access was limited to paid tiers. Comments under Kling's official Instagram announcement show frustration from users who couldn't access it, including one asking whether Brazil was excluded and another objecting to premium-only availability "well into October." The full release on October 15 appears to close that gap, although regional pricing is still not clearly documented.

Why This Matters

The first reason is duration. Going from 15 to 30 seconds per pass changes how video gets made. A 30-second single pass covers a full social ad, a product demo, or a dialogue beat without a stitching step. Every stitch is a chance for drift in faces, lighting, or motion. Removing even one of them changes the economics of usable output.

The second reason is control. Ten keyframes plus 15 references moves Kling 4.0 away from prompting and rerolling and toward directing. The official tagline, "You call the shots," says as much. Reference-driven replacement may matter most for commerce: borrow the camera move from an existing clip and swap in a different product.

The third reason is integration. MCP and CLI support signal that Kling expects agents, not only humans, to be calling the model. @0xLogicrw reports that the creation page also gained a timeline, a canvas, and Agent features. Taken together, these suggest Kling is positioning 4.0 as a production-pipeline component rather than a standalone toy.

Community sentiment reflects the competitive stakes. Khazix, the reviewer whose cost test is cited below, wrote that "people need Kling, and need competition" on launch day. Early-access voices were also enthusiastic. Mark Kretschmann called it "another step change for AI video", sharing a demo clip.

Treat the demos carefully. Several early-access posts in late September carried #ad or #sponsored tags or disclosed invitations, so the sample of public reactions skews promotional.

The Pricing Math: 15 Credits per Second

Kling 4.0 charges per second of output, scaled by resolution. The reported numbers are internally consistent, which is reassuring.

Resolution	Credits per second	30-second clip	Approx. cost (one tester's rate)
1080p	15	450 credits	~16 yuan
720p	10	300 credits	not reported

Both the 15 credits per second and the 450-credit total are reported independently. Khazix's measured 450 credits for a 30-second 1080p clip equals exactly 30 × 15, matching the rate card @Chinazhidx published. The 720p row is arithmetic on the reported rate, not a measured test.

At 15 credits per second, a single 30-second 1080p Kling 4.0 clip costs 450 credits, about 16 yuan at one reviewer's membership rate, before any rerolls.

The "before rerolls" caveat matters. The real cost of AI video is the cost per usable clip. If a 30-second shot needs three attempts, the effective price triples to 1,350 credits. Nobody has published reroll rates for Kling 4.0, so per-usable-clip cost is still an open question.

Kling 4.0 vs Seedance 2.5: What the Reports Show

Seedance 2.5 is the comparison the community keeps returning to. Search results surface a "Kling 4.0 vs Seedance 2.5" video and forum thread. JSFILMZ's first-look review walks through official showcase examples (fight scenes, water simulation, facial animation, motion tracking) and compares them with Seedance 2.5 and Wan 3.0. Here is how the two compare on the dimensions available:

• Single-pass clip length: Kling 4.0 reaches 30 seconds. Seedance 2.5's equivalent figure is unverified, with no public number in the sources reviewed.
• Reference inputs: Kling 4.0 accepts up to 15 via Omni Reference. Seedance 2.5's count is unverified, with no public number in the sources reviewed.
• Pricing: Kling 4.0 costs 15 credits per second at 1080p. Seedance 2.5 pricing is unverified, with no public number in the sources reviewed.
• Motion vs. stability: @KanaWorks_AI's side-by-side found Kling stronger in motion and attack impact, while Seedance was more stable overall. That is a subjective read.
• Controlled A/B: @sebatheepan ran the same prompt and settings on Seedance 2.5 and Kling 4.0 Flash at 720p and 20 seconds, with no edits or stitching. That is the most controlled comparison public so far, but it tested Flash, not the full model.
• Benchmarks: unverified, with no public number from either lab yet.

On the limited evidence so far, Kling 4.0 appears to trade some stability for more aggressive motion compared with Seedance 2.5. No standardized test has confirmed that, and most comparisons used the Flash tier.

One more data point: invited tester @hq4ai reported that the full model beat Flash on picture clarity, audio clarity, and lip sync in a native 30-second, 21:9 clip. If that holds, Flash-based comparisons may understate the full model.

What We Know vs. What We Don't

What we know:

• Kling 4.0 opened to all users on October 15, 2026, after Flash had been live for some paying subscribers since late September.
• Clips run up to 30 seconds in a single pass, up from 15 seconds in Kling 3.0.
• Multi-Keyframe Control supports up to 10 keyframes for actions, scene changes, and camera rhythm.
• Omni Reference combines up to 15 images, videos, and character subjects per generation.
• Reported pricing is 15 credits per second at 1080p and 10 at 720p. A 30-second 1080p clip costs 450 credits, about 16 yuan at Khazix's rate, excluding regenerations.
• MCP and CLI access are live, alongside new timeline, canvas, and Agent features on the creation page.

What we don't know:

• When 10-bit HDR at 1080p and 4K ships. It is advertised but marked "coming soon."
• When the developer and enterprise API launches.
• When video extension of up to 2 minutes arrives.
• How Kling 4.0 performs on any standardized quality, speed, or latency benchmark. None has been published.
• How credits convert to local currency outside China, and whether all regions get equal access.

Put another way, the available sources confirm duration, keyframes, references, per-second pricing, and agent access. They don't yet confirm HDR, extension, API timing, measured quality, or global pricing.

One correction to launch-day framing: 4K is not a new Kling 4.0 feature. @0xLogicrw notes that Kling 3.0 already supported 4K. The genuinely new output format is 10-bit HDR, and it isn't available yet.

How to Evaluate It Yourself

The demos are curated, and many are sponsored. A useful internal eval should check what the marketing doesn't.

1. Test the 30-second claim under stress. Run prompts with fast motion, multiple characters, and on-screen text. Check frames 20–30 for identity drift, since that is where long single-pass generations usually break.
2. Measure reroll rate. For each prompt, count attempts until you get a usable clip. Multiply by the per-second rate to get cost per usable clip. That number is more useful than the headline 450 credits.
3. Stress Omni Reference. Start with 3 references and work up to 15. Note when consistency starts to slip. Early-access tester @xIrissy reported coherence across as many as 15 inputs. Verify that on your own assets.
4. Separate Flash from full. Beta reports put Flash at 720p and 20 seconds. Label which tier produced each test clip.

Teams that want to run this matrix through an API rather than the consumer UI can use a Kling 4.0 endpoint while Kling's own developer API remains pending.

What Builders Should Do Today

First, prototype keyframe-driven workflows now, even if you plan to switch to the API later. The 10-keyframe structure, possibly a start frame, eight mid-frames, and an end frame, shapes how storyboards should be written.

Second, budget per second, not per clip. A pipeline producing 100 clips of 30 seconds at 1080p consumes 45,000 credits before rerolls. Plan around that figure.

Third, don't promise HDR deliverables. 10-bit HDR is the headline output upgrade, and it has not shipped. Any client commitment that depends on it is a timing risk.

The Week Ahead

Three signals are worth tracking. Watch Kling's release notes for the 10-bit HDR and 2-minute extension rollouts, since both were advertised in September and neither is live. Run your own reroll-rate test before relying on the 450-credit figure. Look for the developer API launch and its published per-second pricing, which will show whether consumer credit rates carry over to the API.

Try related models on Kie.ai: Kling 4.0 (Coming Soon), Kling 4.0 Flash (Coming Soon) and Seedance 2.5.