--- title: "Kling 4.0: Specs, Strengths & Prompt Tips | imaginary.app" description: "Kling 4.0 is Kuaishou’s newest video model, built for steadier fast action and complex camera work, with stereo audio. Specs, prompt tips and FAQs." url: https://www.imaginary.app/models/kling-4 --- Updated November 2026 # Kling 4.0 Kling 4.0 is Kuaishou’s newest video model, officially launched on October 15, 2026, and the successor to Kling 3.0. Kuaishou built it for intense motion and complex camera work, and it generates sound with the picture. Key takeaways - Kling 4.0 launched October 15, 2026 and succeeds Kling 3.0 (February 2026); a lighter Kling 4.0 Flash also exists. - Kuaishou’s first stated improvement is steadier large-scale motion in high-speed action and complex camera work. - fal’s endpoint, which we use, outputs 720p or 1080p. Kling’s own pages differ on 4K and 10-bit HDR: its feature page marks them “coming soon”, its comparison blog lists them. - Audio is two-channel stereo with lip sync, and fal’s schema has no audio on/off setting. - fal’s endpoint has no negative-prompt or guidance controls, so all direction goes into the prompt itself. Kuaishou Generate with Kling 4.0 Write a prompt, pick Kling 4.0, choose your settings and see the credit cost before you start. Failed generations return their credits. [Open the generator](https://www.imaginary.app/generate)[View Pricing](https://www.imaginary.app/pricing) Sign in with Google to create an account; buy credits only when you need them. ## On imaginary.app These are the settings our generator offers for Kling 4.0 right now, read from our live model catalog. - Type Video, from a text prompt - Resolutions 720p, 1080p - Aspect ratios 16:9, 9:16, 1:1 - Clip lengths 5 s, 10 s - Audio Always included - Starting price 6.22 credits (about $1.33–$1.55) at the lowest settings (720p, 16:9, 5 s, sound included) The generator shows the exact credits for your settings before you start. USD ranges depend on which [pack or plan](https://www.imaginary.app/pricing) you bought credits with. If a generation fails, or you cancel it before it starts, its credits go back to your balance. Very rarely, when we can't confirm with the provider whether a generation finished, the credits stay reserved while we check, rather than being charged. Models other than Veo 3.1 need an account that has bought a credit pack or plan, and they have daily usage limits, per account and across the site: if one is reached, the generator tells you and you can try again the next day (limits reset at midnight UTC). ## Built for fast action and moving cameras Kuaishou’s launch release names three priorities: realism, control and professional quality. Its first stated improvement is “steadier large-scale motion, with smoother continuity in high-speed action and complex camera work”. This is the Kling model to try when a lot happens at once: a chase through a crowd, a camera orbiting a dancer, a vehicle passing close to the lens. ## Events that unfold over time On Kling’s own platform, Kling 4.0 generates 3 to 30 seconds natively, without stitching, which Kuaishou pitches for long takes and continuous storytelling; on imaginary.app the available lengths are shown in the “On imaginary.app” panel. Even in a short clip, Replicate’s guidance helps: describe events over time, for example “she climbs the stairs, then steps out onto the balcony”. Kling also describes extending videos to two minutes, but lists that as a separate, coming-soon feature. ## Stereo sound, always on through fal fal describes Kling 4.0 audio as “two-channel stereo with lip sync, no audio field in the schema”, with ten speech languages, accents such as British and Indian English, and lip sync that covers sung vocals. Kling’s own comparison says 4.0 adds Portuguese, German, French, Hindi and more to Kling 3.0’s languages. On fal’s endpoint, which we use, every clip comes with a soundtrack; for a silent clip, Kling 3 Pro still has an audio switch. ## How it relates to Kling 3 Pro and 4.0 Flash Kling 4.0 is a new generation, not an update to 3 Pro, and both remain available. On Kling’s platform, 4.0 doubles 3.0’s single-pass length and fal’s schema adds 21:9 framing; the lengths and ratios offered here are in the “On imaginary.app” panel. In fal’s schemas, 4.0 also drops 3 Pro’s audio switch and its negative-prompt and guidance fields; of those, only the audio switch is a setting in our generator. Kling 4.0 Flash is a lighter sibling (720p on fal); this page covers the full model. ## Kling 4.0 specs from Kuaishou What Kuaishou and its API partners document for the model itself. A maker spec is not always a setting our generator offers: what you can choose on imaginary.app is listed in the block above. | Spec | As documented | Source | | -------------------------------------- | ----------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------- | | Release | Officially launched October 15, 2026 | [Kuaishou press release — Kling 4.0 officially launched (Bernama, Oct 19, 2026)](https://bernama.com/en/press/news.php?id=2622471) | | Predecessor | Kling 3.0 (Video 3.0 / 3.0 Pro); 4.0 extends single-pass length from 15 to 30 seconds | [Kling AI — Kling 4.0 feature page](https://kling.ai/feature/kling-4-ai-video-generation) | | Length per generation (Kling platform) | 3 to 30 seconds in a single pass | [Kling AI — Kling 4.0 feature page](https://kling.ai/feature/kling-4-ai-video-generation) | | Resolution (fal endpoint) | 720p or 1080p; 1080p is the default | [fal — Kling 4.0 text-to-video (llms.txt schema)](https://fal.ai/models/kling/v4/text-to-video/llms.txt) | | 4K / HDR | Kling’s feature page describes native 4K and 10-bit HDR as coming soon; fal’s endpoint stops at 1080p | [Kling AI — Kling 4.0 feature page](https://kling.ai/feature/kling-4-ai-video-generation) | | Aspect ratios (fal endpoint) | 16:9, 9:16, 1:1, 21:9 | [fal — Kling 4.0 text-to-video (llms.txt schema)](https://fal.ai/models/kling/v4/text-to-video/llms.txt) | | Audio (fal endpoint) | Two-channel stereo with lip sync; no audio on/off field in the fal schema | [fal — Kling 4.0 vs. Kling 3.0 (Nov 3, 2026)](https://fal.ai/learn/devs/kling-4-0-vs-kling-3-0) | | Speech languages (per fal) | Ten, with accents such as British and Indian English | [fal — Kling 4.0 vs. Kling 3.0 (Nov 3, 2026)](https://fal.ai/learn/devs/kling-4-0-vs-kling-3-0) | | Speech languages (per Kling) | Adds Portuguese, German, French, Hindi and more to Kling 3.0’s list | [Kling AI blog — Kling 4.0 vs Kling 3.0](https://kling.ai/blog/kling-4-vs-3) | | Prompt controls (fal endpoint) | No negative prompt or CFG scale in the fal schema | [fal — Kling 4.0 vs. Kling 3.0 (Nov 3, 2026)](https://fal.ai/learn/devs/kling-4-0-vs-kling-3-0) | | Lighter variant | Kling 4.0 Flash: 720p, 3–20 seconds on fal | [fal — Kling 4.0 Flash text-to-video](https://fal.ai/models/kling/v4/flash/text-to-video/llms.txt) | ## Who Kling 4.0 is for ### Good fit - Action-heavy shots: sports, chases, dance and fast camera orbits where motion stability matters. - Shots with a complex camera move, such as an orbit, a whip pan or a fast tracking shot alongside the subject. - Scenes with dialogue or ambient sound where you want stereo audio generated with the picture. ### Look elsewhere if - Silent footage you plan to score yourself; on fal’s endpoint, which we use, the audio cannot be switched off. - True 4K or HDR delivery; fal’s endpoint stops at 1080p. - People who rely on negative prompts to suppress artefacts; fal’s Kling 4.0 endpoint, which we use, has none, and our generator has no negative-prompt field for any model. ## Prompt tips for Kling 4.0 Order the prompt as Replicate’s guide suggests: subject, action, setting, camera. There is no negative-prompt field, so describe what you want rather than what to avoid. Example prompt (written by us) ``` A parkour runner in a red hoodie sprints across wet rooftops at dusk, vaults a ventilation unit and lands in a roll. City lights glow below. The camera tracks alongside at shoulder height, then whips around to face her as she stands up. ``` Write the action as beats joined by “then”, with a beginning, a middle and an end, and keep the number of beats to what fits the clip length you pick. Example prompt (written by us) ``` A lighthouse keeper climbs a spiral staircase holding a lantern, then pushes open a heavy door onto the gallery, then looks out as a storm front rolls in over the sea. Wind howls and rain begins to hit the glass. Slow, steady handheld camera following from behind. ``` Name camera moves explicitly. Kuaishou’s motion work targets fast action and complex camera moves, so orbits and whip pans show the difference from older versions most. Example prompt (written by us) ``` Low-angle orbit around a breakdancer spinning on one hand in an empty parking garage, fluorescent lights flickering overhead, echoing beat and sneaker squeaks. ``` Because fal’s endpoint always generates audio, describe the soundscape you want: dialogue, ambience or music. Otherwise the model will choose one for you. ## Limitations - On fal’s endpoint, which we use, audio is always on; there is no setting to generate a silent clip. - Without negative-prompt or guidance controls on fal’s endpoint, there are fewer ways to steer away from artefacts once a prompt is written. - Kling’s motion and lip-sync improvements come from the maker’s release notes, not independent testing. - The 30-second single pass, 21:9 framing and 4K are maker or fal capabilities; the clip lengths, aspect ratios and resolutions offered on this site are listed in the “On imaginary.app” panel. - Kling 4.0 is made by Kuaishou; imaginary.app is not affiliated with Kuaishou. ## Related models - [Kling 3 Pro](https://www.imaginary.app/models/kling-3) - [Seedance 2.5](https://www.imaginary.app/models/seedance-2-5) - [Wan 3.0](https://www.imaginary.app/models/wan-3-0) - [Veo 3.1 (Quality)](https://www.imaginary.app/models/veo-3-1) - [Every model on imaginary.app](https://www.imaginary.app/models) - [AI video generator overview](https://www.imaginary.app/ai-video-generator) ## Frequently asked questions ### Kling 4.0 vs Kling 3 Pro: which should I use? Compare the two “On imaginary.app” panels for the lengths and resolutions offered here; beyond those, the choice is about the model. Use Kling 4.0 for fast action and complex camera moves, which Kuaishou names as its main improvement. Use Kling 3 Pro when you want a silent clip, since it has an audio switch, or for multi-shot prompts and on-screen text, which Kuaishou highlights for 3.0. Kling 4.0 is the newer model, launched October 15, 2026; Kling 3.0 arrived in February 2026. ### Does Kling 4.0 have audio? Yes. fal describes it as two-channel stereo with lip sync, in ten speech languages. There is no option to switch audio off on fal’s endpoint. ### Does Kling 4.0 support 4K? Not through fal’s endpoint, which we use: it outputs 720p or 1080p. Kling’s own pages are inconsistent: the feature page describes native 4K and 10-bit HDR as coming soon, while its Kling 4.0 vs 3.0 blog lists them. The resolutions offered here are listed in the “On imaginary.app” panel. ### What is Kling 4.0 Flash? A lighter variant that fal lists at 720p. It is not offered on imaginary.app; this page covers the full Kling 4.0. ## Sources Prices, model specs and dates on this page were checked on November 10, 2026. Third-party prices change; check the source before you rely on a number. - [Kuaishou press release — Kling 4.0 officially launched (Bernama, Oct 19, 2026)](https://bernama.com/en/press/news.php?id=2622471) - [Kling AI — Kling 4.0 feature page](https://kling.ai/feature/kling-4-ai-video-generation) - [Kling AI blog — Kling 4.0 vs Kling 3.0](https://kling.ai/blog/kling-4-vs-3) - [fal — Kling 4.0 text-to-video (model page and API schema)](https://fal.ai/models/kling/v4/text-to-video) - [fal — Kling 4.0 text-to-video (llms.txt schema)](https://fal.ai/models/kling/v4/text-to-video/llms.txt) - [fal — Kling 4.0 vs. Kling 3.0 (Nov 3, 2026)](https://fal.ai/learn/devs/kling-4-0-vs-kling-3-0) - [fal — Kling 4.0 Flash text-to-video](https://fal.ai/models/kling/v4/flash/text-to-video/llms.txt) - [Replicate — kwaivgi/kling-v4.0 model page](https://replicate.com/kwaivgi/kling-v4.0) - [imaginary.app pricing](https://www.imaginary.app/pricing) How we checked: model specs come from Kuaishou's and its API partners' pages listed above; the imaginary.app settings and starting price come from our live model catalog. Example prompts are ours, not Kuaishou's. Commercial use: licence and usage terms for Kling 4.0 are set by Kuaishou. Check them, and our [Terms of Service](https://www.imaginary.app/terms-of-service), before you publish what you make. Kuaishou ## Try Kling 4.0 on your own prompt One account and one credit balance for Kling 4.0, Veo 3.1 and every other video model we offer. The price shows before you generate. [Open the generator](https://www.imaginary.app/generate)[View Pricing](https://www.imaginary.app/pricing) Sign in with Google to create an account; buy credits only when you need them.