Kling 4.0 Is Here: 30-Second Single-Pass Video, 4K HDR, Keyframe Control
Kling 4.0 dropped globally on October 15 — and it changes the math for anyone producing AI video at scale in Hong Kong. Not an incremental update. The headline: 30 seconds of native video in a single generation pass, up to 4K with 10-bit HDR, and keyframe-level control that finally lets you direct AI video like a real shoot.
What Kling 4.0 Actually Ships
30-second single-pass generation. No stitching, no multi-pass cleanup. One prompt, one render, up to 30 seconds of coherent video with stable motion across the full clip. For HK agencies producing 30-second social spots or product demos, this means generating a finished-length clip in one go.
4K with 10-bit HDR. Kling 4.0 outputs up to 4K with 10-bit color depth. High-contrast scenes — backlit product shots, night scenes, neon-lit environments — retain highlight and shadow detail. The 21:9 ultrawide format is also supported.
Omni Reference with up to 15 assets and 10 keyframes. You can input up to 15 multimodal references — subject images, three-view character sheets, storyboards, wireframes, white-model videos, depth maps, voice samples — and up to 10 keyframe images to lock down scene transitions, character positions, and camera movement.
What This Means for HK Production Teams
Hong Kong creative agencies work on tight budgets and tighter deadlines. For clients like HSBC, HKTB, and major lifestyle brands, Kling 4.0 makes AI video production-ready:
— A standard :30 TVC or social cut generated natively means one pass instead of three stitched clips. Less character drift, fewer lighting inconsistencies. — Plan a 10-shot sequence with keyframes and let Kling 4.0 fill the transitions. The closest AI video has come to a traditional animatic workflow. — The video extension feature (rolling out soon) lets you build longer arcs without losing original style and character consistency up to 2 minutes.
Kling also ships MCP and CLI support, so you can pipe generation directly into your existing toolchain — no manual uploads to a web UI. On Cooly Studio, you can route Kling 4.0 alongside other models, compare outputs, and pick the best shot for each brief without switching platforms.
FAQ
Q: How much does Kling 4.0 cost? A: Consumer pricing is 10 credits/second at 720p and 15/second at 1080p, sound included. On Standard (US$6.99/mo), a 30-second 1080p clip costs about 450 credits. API pricing hasn't been announced yet.
Q: Can I use Kling 4.0 through Cooly Studio? A: Yes. Cooly Studio supports Kling models alongside Seedance, Veo, Runway, and others. Once API access opens to developers, you will be able to route it through your existing cooly.ai workflow.
Q: How does it compare to Seedance 2.5? A: Both offer 30-second single-pass generation. Seedance accepts more references (50 vs Kling's 15). Kling counters with keyframe-level control (10 keyframes) and 10-bit HDR at a lower entry price.
Q: Is Kling 4.0 available via API? A: Not yet for general developers. Kling 4.0 Flash is available to Ultra yearly subscribers. Full API access for enterprise and developer partners is expected to follow the consumer launch.
Q: Should I switch from Kling 3.0? A: For any project requiring clips longer than 15 seconds — yes. For short social clips (5-10 seconds), Kling 3.0 remains competitive at 6-8 credits/second without audio. Test both on your specific brief.
Bottom Line
Kling 4.0 is a production tool aimed at agencies and brands that need reliable, broadcast-quality AI video. The combination of 30-second native generation, keyframe control, and 10-bit HDR makes it a serious option for commercial workflows — especially in Hong Kong, where speed and quality are both non-negotiable. Try it on Cooly Studio and see how it compares to your current model stack.