The short answer
Kling AI is the better choice for generating new clips, and Runway is better for editing real footage and professional finishing. Kling 4.0, available to everyone since 15 October 2026, makes 3 to 30 seconds with stereo sound and dialogue in one generation, up to 4K. Runway's Gen-4.5 makes 2 to 10 second clips through its API, but its Aleph 2.0 editing model, timeline and plugins for Premiere Pro and DaVinci Resolve have no equal in Kling.
| Runway | Kling AI | |
|---|---|---|
| Made by | Runway AI, Inc., United States | Kuaishou Technology; operated by Kling AI Pte. Ltd., Singapore law |
| Flagship models | Gen-4.5 (December 2025), Aleph 2.0 for editing (May 2026) | Kling 4.0 and Kling 4.0 Flash (15 October 2026) |
| Clip length | 2 to 10 seconds per Gen-4.5 generation (API) | 3 to 30 seconds (Flash: 3 to 20) |
| Resolution and export | 4K upscaling; ProRes and PNG sequences on Pro and above; HDR on Max | 720p, 1080p or 4K natively |
| Native audio | Not documented for Gen-4.5; separate music, voice and sound tools | Stereo sound, dialogue and lip sync in many languages |
| Control | First frame for Gen-4.5; up to 5 keyframes in Aleph 2.0 edits | Up to 10 keyframes, Omni Reference up to 15 items, Motion Control |
| Editing real footage | Aleph 2.0, Studio timeline, Adobe and DaVinci Resolve plugins | Up to 5 clips, 30 seconds combined |
| Free plan | 125 one-time credits | Monthly free credits; no commercial use, watermark kept |
| Commercial use | Not restricted by the terms, on any plan | Paid plans only; outputs must be labelled as Kling AI unless permitted |
| Training on inputs | Yes; no opt-out described | Yes; revoke by emailing support@kling.ai |
Runway vs Kling AI at a glance
Runway, made by Runway AI, Inc. in the United States, has become a full AI video production suite. Its own models are Gen-4.5, announced on 1 December 2025 for text and image to video, and Aleph 2.0, released on 21 May 2026 for editing footage you already have. Around them sit Runway Agent, the Studio timeline, Workflows, plugins for Adobe Premiere Pro, After Effects and DaVinci Resolve, and many third-party models. Kling AI is the video generator from Kuaishou Technology, run internationally by Kling AI Pte. Ltd. under Singapore law. Its flagship, Kling 4.0, became available to everyone on 15 October 2026 and makes 3 to 30 seconds of video with stereo sound in one generation.
The quick verdict: Kling AI is the better generator, and Runway is the better editor. If you are making new shots from nothing, Kling 4.0 gives you longer clips, sound and more control. If you are working with real footage, an editing timeline and a professional finishing pipeline, Runway wins. Runway even hosts Kling models on paid plans, and its pricing page now lists Kling 4.0, which reached Runway's API on 23 October 2026, so some teams will not need to choose. These verdicts are based on what each company documents, not on tests we ran.
Realism and motion: Kling AI wins, narrowly
Gen-4.5 was a strong model at launch: Runway says it improves physics, motion and visual consistency, and it ranked first on the Artificial Analysis text-to-video leaderboard with 1,247 Elo points when it was announced in December 2025. Runway is also unusually honest about its limits. It lists three: effects sometimes come before their causes, objects can appear or vanish between frames, and actions succeed more often than they would in real life.
Kling 4.0 is ten months newer, and Kling AI has tools aimed directly at believable people. Motion Control, launched with Kling Video 3.0 on 4 March 2026, recreates movement and facial expression from a reference performance on a character. Omni Reference combines up to 10 images, up to 5 videos (30 seconds in total) and up to 7 elements, such as a character or product, so the model has more to go on than words. For human performances, dialogue and continuous action, Kling has the edge on documented features. For a single short cinematic shot, such as liquid pouring or a slow push-in on a product, Gen-4.5 remains an excellent choice.
Length and resolution: Kling AI wins
Kling 4.0 makes 3 to 30 seconds in a single generation at 720p, 1080p or 4K, in 21:9, 16:9, 1:1 or 9:16. Kling 4.0 Flash, the faster and cheaper option, makes 3 to 20 seconds at 720p. A two-minute extension and 10-bit HDR were listed as coming soon at launch, so do not plan around them yet.
Runway's API makes Gen-4.5 clips of 2 to 10 seconds, so longer stories mean cutting shots together in the timeline. Runway is stronger on delivery formats: paid plans include 4K upscaling, Pro and above can export ProRes 4444 or PNG sequences from Gen-4.5 and Aleph 2, and Max adds HDR. If your problem is clip length, Kling wins. If your problem is getting a broadcast-quality file into an edit, Runway does more.
Control: camera, keyframes and first and last frames: Kling AI wins
Kling 4.0 lets you set up to 10 keyframe images, so the story beats land in the order you want, and Kling fills the motion between them. Its release history also describes extracting frames from a clip to use as start and end frames. Camera movement can come from a reference video in Omni Reference, and prompts can run to 8,000 tokens, which leaves room for a detailed shot description. Kling 4.0 is also available through MCP and a CLI for batch generation.
Runway's Gen-4.5 accepts a first frame image alongside your prompt, added on 21 January 2026. Runway said at launch it would bring its existing control modes, including keyframes, to Gen-4.5, but its changelog does not yet list keyframes, a last frame or camera controls for Gen-4.5. Where Runway gives you control is in editing: Aleph 2.0 accepts up to five keyframe images placed at points in an existing clip, and Workflows let you chain steps into a repeatable pipeline. For directing a new shot, Kling offers more.
Audio: Kling AI wins
Kling 4.0 generates two-channel stereo sound with the picture, including dialogue with lip sync in Chinese, English, Japanese, Korean, Spanish, Portuguese, German, French, Hindi and more, with American, British and Indian English accents. You can also give an element a voice through Omni Reference. One prompt can produce a scene with dialogue, ambience and music.
Runway's documentation does not describe native audio for Gen-4.5. Instead, Runway adds sound around the video: paid plans include music, voice and sound effects tools, Pro adds a custom voice clone, and third-party models such as ElevenLabs V4 are available. That works, but it is an extra step and the sound is not generated together with the motion. The exception is third-party models: Runway's API added Kling 4.0, whose generations include audio, on 23 October 2026.
Editing existing footage: Runway wins clearly
This is Runway's biggest advantage. With Aleph 2.0 and Edit Studio you edit one frame the way you want, and Runway carries the change through the rest of the clip, keeping the original camera move and timing. Through the API it accepts input clips of 2 to 30 seconds. The Studio timeline lets you trim, stitch, reorder and export, and since September 2026 Runway plugins work inside Premiere Pro and After Effects, where you can restyle footage on your timeline with Aleph 2, and inside DaVinci Resolve.
Kling 4.0 can edit too: up to five input clips of 3 to 30 seconds each (30 seconds combined), changing expressions, movement, camera, style or background while keeping the rest stable. That is useful for fixing a generated clip. But Kling has no professional editing integration, and Runway is built around footage you shot yourself.
Commercial terms: Runway wins
Runway's terms of use, updated on 23 October 2026, say Runway does not claim ownership of your inputs or outputs and does not restrict commercial use of outputs, as long as you follow the terms. They do not set different commercial rules for the free plan. Runway disclaims any warranty of non-infringement and notes that similar outputs may be generated for other users.
Kling's terms, updated on 21 April 2026, also say Kling does not claim ownership, but forbid commercial use of outputs without written permission. Kling's membership page gives that permission to paid subscribers, as long as outputs are not used to build competing products, and the free Basic plan keeps the watermark and has no commercial use. Without written permission you must label outputs with the Kling AI brand or say they were generated by Kling AI, and content you publish on Kling can be reused by other users through features such as Recreate.
On training, both can use your material. Runway's terms say inputs and outputs may be used to train its models and describe no opt-out; Enterprise customers have separate terms. Kling's terms let it use your inputs to train its models, and section 4.7.4 says you can revoke that authorisation by emailing support@kling.ai. For confidential client footage, check your company's policy before using either.
Value: Kling AI wins
Kling's Basic plan gives non-subscribers monthly free credits, claimed at login and valid for 31 days, though without 1080p or 4K and without commercial use. Paid plans are Standard (660 credits a month), Pro (3,000), Premier (18,000 by default) and Ultra+ (57,000), and Standard already includes 1080p and 4K, watermark removal, commercial use and up to four videos per generation. Runway's free plan is 125 credits once, which never refill. Its paid plans are Standard (625 credits a month), Pro (2,250), Max (9,500, with up to one month of rollover), a Team plan of 6,900 credits per seat and Enterprise.
Credit costs per second are not published in a form we could confirm for either tool, so compare what a month's credits buy on a short test. For pure generation, Kling's free monthly credits and longer clips give more. Runway's value is the suite around the models: if you would otherwise pay for an editor, Ads tooling and plugins, Runway Pro can be the better deal. Check Runway's pricing and Kling's membership page for current prices.
Same task, both tools: a 30-second product video with a presenter
The brief: a skincare brand needs a 30-second vertical video for social. A presenter introduces a new serum in a bright bathroom, says one line to camera, applies it and smiles, followed by a close-up product shot and an end card. The brand also has 20 seconds of real footage of the serum on a counter that it wants to reuse. Here is how each tool would handle it, based on documented features.
In Kling AI
- On a paid plan, so the clip can be used commercially and has no watermark, attach a photo of the presenter you have rights to and a product photo as elements.
- Draft the presenter scene in Kling 4.0 Flash at 720p and 9:16, with the line of dialogue in quotation marks and the accent named.
- When it works, render the final in Kling 4.0 at 1080p, up to 30 seconds in one generation, with room tone and soft music generated together.
- Use keyframes to fix the order: product held up, product applied, smile.
- Label it as made with Kling AI unless you have written permission not to, and keep the project unpublished on the platform.
In Runway
- Generate the presenter shots with Gen-4.5 from a first frame image, as two or three clips of up to 10 seconds, one action per shot. For the spoken line, use a third-party model on Runway with native audio, or add voice with Runway's voice tools.
- Restyle the brand's real counter footage with Aleph 2.0, for example warmer morning light, keeping the camera move.
- Assemble everything on the Studio timeline, or in Premiere Pro or DaVinci Resolve with the Runway plugin, add music and the end card, and export.
- Use Runway Ads or Brand Kits to make variants for other platforms.
Our verdict on this brief: a split. Kling AI for the presenter scene, because one 30-second generation with dialogue avoids continuity breaks. Runway for the finished video, because the real footage, timeline and export need an editor. If you can only pay for one, choose Kling for social teams without an editor, and Runway for teams who already cut video in Premiere or Resolve.
Who should pick Runway and who should pick Kling AI
- Pick Kling AI if you make social, ad or explainer clips from scratch and want longer single shots with dialogue, sound and lip sync, strong reference control and a free monthly allowance to start.
- Pick Runway if you edit real footage, work in Premiere Pro, After Effects or DaVinci Resolve, need ProRes or HDR delivery, or want one workspace with many models, an agent and a timeline.
- Kling AI is not for organisations that cannot use Chinese-owned services, or anyone who wants commercial use without paying.
- Runway is not for people who want long talking scenes in one generation, or whose footage cannot be used for model training.
Read our full guides to Runway and Kling AI, compare Kling vs Hailuo and Runway vs Luma, see the best AI for video and Runway alternatives, or practise with Runway lessons and Kling lessons.
The prompts below follow each tool's documented way of working. Runway prompts read like a shot list, with the first frame uploaded and only the motion described. In Kling you choose the model, resolution, ratio and duration in the creation page, attach references in the input box, then type the prompt.
Prompts to copy
Runway Gen-4.5: product hero shot from a photo
[Upload the product photo as the first frame] Slow 90-degree orbit around the serum bottle on a white marble counter, soft morning window light, shallow depth of field, background gently out of focus. The bottle stays sharp and does not change shape.
You get: A clean, premium 5 to 10 second product shot for the end of an ad
Runway Aleph 2.0: restyle real footage
[Upload your clip] Keep the camera move, timing and objects exactly the same. Change the light to warm early morning sun from the left, with soft shadows across the counter and a faint haze in the air.
You get: A new look for footage you already own, without reshooting
Kling 4.0: presenter scene with dialogue
Attach first: the presenter photo and the product photo as elements. Prompt: A 20-second vlog in a bright bathroom. The presenter picks up the serum, says in a British accent: "This is the one I use every morning", applies a drop to her cheek and smiles at the camera. Handheld selfie camera, natural light, realistic image quality. Include room tone and soft background music.
You get: A user-style product clip with matched lip sync and sound
Kling 4.0: story beats with keyframes
Attach first: three keyframe images (serum held up, serum applied, close-up smile). Prompt: A 15-second continuous shot that moves from the first keyframe to the last. She lifts the bottle towards the camera, applies a drop, then turns to the mirror and smiles. Slow handheld push-in, warm morning light. Include soft water sounds and gentle acoustic music.
You get: A clip where the story lands in the order you set