Kling 4 API: 30 Second Video with Audio
The Kling 4 API delivers Kling 4.0, the video model Kuaishou released on October 15, 2026. It generates up to 30 seconds in a single pass, follows up to 10 keyframes, blends 15 images, videos, and subjects through Omni Reference, and adds stereo audio with lip sync. Atlas Cloud serves all four endpoints, including video editing, on one OpenAI-compatible key from $0.11 per second. Start building today.
Kling 4.0 is developed by Kuaishou. Atlas Cloud (operated by Atlas Cloud AI LLC) provides access to it and does not own it. All trademarks belong to their respective owners.
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Watch Kling 4 Hit Every Keyframe in One Take
Choose Your Kling V4 Video Workflow
Compare Kling V4 endpoints by input type, creative controls, and production use, from prompt based generation to editing existing footage.
| Modality | Description |
|---|---|
| Kling V4 Text-to-Video API | Kling V4 turns text prompts into videos lasting 3 to 30 seconds at 720p or 1080p. Support for the 21:9 cinematic aspect ratio gives wide compositions more room. Choose this endpoint for narrative concepts, advertising drafts, and cinematic scene development from a written brief. |
| Kling V4 Image-to-Video API | Animate a first frame through up to 10 keyframes to a last frame in a single shot lasting 3 to 30 seconds. These visual anchors guide progression from the opening image to the final composition. Use this endpoint for storyboard animation, staged product reveals, and sequences with a defined visual destination. |
| Reference-to-Video API (Omni Reference) | When a scene depends on existing assets, Omni Reference combines up to 15 references across images, videos, subjects, and voices into a consistent video lasting 3 to 30 seconds. Build scenes around supplied references for character storytelling, product campaigns, and creative concepts that require continuity. |
| Video-Edit API (Video Editing) | Existing footage becomes the starting point for revisions directed by text, with optional reference images, videos, subjects, and voices. Restyle the clip, replace content, or add new elements to produce an edited video. This endpoint suits visual revisions, product substitutions, and alternate creative treatments. |
Direct Every Shot with the Kling 4.0 API
Every Kling 4 API request can run 30 seconds in one take, follow up to 10 keyframes, draw on 15 reference assets, and return stereo dialogue, with targeted editing for the footage you already have.
Kling 4.0 Native 30 Second Stories
Kling 4 generates 3 to 30 seconds in a single pass, so push-ins, orbits, and tracking shots stay smooth across one continuous take. Frame each clip in 21:9, 16:9, 1:1, or 9:16.
Ten Keyframes, One Directed Sequence
Place up to 10 keyframe images to pin character states, scene changes, and product reveals at the moments you choose. The model fills in the motion between them, so pacing follows your storyboard.
Omni Reference Across 15 Assets
Omni Reference accepts up to 15 combined assets in one task, including as many as 10 images, 5 videos, and 7 subjects. Reference videos can guide performance, camera movement, and pacing, while images define characters, products, composition, or style. White model and depth map videos are also supported. The total remains capped at 15 even when individual category limits are higher.
Stereo Dialogue Across Languages
Audio arrives with the picture in two-channel stereo, with tighter lip sync for speaking characters. Dialogue covers English, Chinese, Japanese, Korean, Spanish, Portuguese, German, French, and Hindi, plus regional accents.
Borrow Motion from Reference Video
Upload a clip and Kling 4 reuses its performance, action, camera movement, or pacing on new characters and sets. White-model and depth-map videos add precise control over motion and timing.
Edit Footage Without Reshooting
When one detail is wrong, change only that detail. Kling 4.0 edits expressions, body movement, camera position, style, or background across up to 5 input clips totaling 30 seconds while the rest stays stable.
Kling V4 in a One Prompt Video Showdown
See how Kling V4, a leading rival, and the previous Kling generation interpret the same production-ready prompt across two distinct video challenges.
Create a 5-second cinematic video of a lone astronaut walking through a rain-soaked neon market at night. Begin with a wide establishing shot, then track smoothly behind the astronaut as vendors, umbrellas, holographic signs, and reflections pass through the frame. A small robotic bird launches from a stall, circles the astronaut, and lands on their shoulder. Preserve coherent architecture, natural walking motion, realistic rain interaction, stable character details, readable spatial depth, and consistent lighting. Use saturated cyan and amber highlights, shallow depth of field, subtle handheld movement, volumetric mist, and a restrained science fiction atmosphere. No text, logos, subtitles, cuts, or abrupt camera jumps.
Generated with Kling V4 on Atlas Cloud
Generated with Seedance 2.5 Text-to-Video on Atlas Cloud
Generated with Kling V3.0 Turbo Text-to-Video on Atlas Cloud
Generate an 6-second photorealistic video of an elaborate glass dessert transforming into a living mechanical hummingbird on a sunlit restaurant table. Show the dessert cracking gradually as translucent wings unfold, tiny gears begin turning, and droplets of syrup slide across the glass surface. The hummingbird should hover, rotate once above the plate, and fly toward the camera while the background remains physically consistent. Emphasize accurate reflections, believable material transformation, fine mechanical motion, stable object geometry, controlled camera focus, and warm morning light. Use one continuous macro shot with a slow push-in. No text, logos, people, cuts, or sudden viewpoint changes.
Generated with Kling V4 on Atlas Cloud
Generated with Seedance 2.5 Text-to-Video on Atlas Cloud
Generated with Kling V3.0 Turbo Text-to-Video on Atlas Cloud
Direct Stories and Product Films with Kling V4
Whether you are pitching a film or refreshing a campaign, Kling V4 supports storyboard previews, product launches, artwork animation, recurring character scenes, footage revisions, and widescreen concepts.
Storyboard Previews with Kling 4.0
Test a sequence before booking a crew. Turn storyboard frames into up to 10 keyframes, and Kling 4 animates each beat, entrance, and final reveal in one continuous shot of up to 30 seconds.
Product Ads from Mixed References
Feed product photos, model shots, and a campaign poster into one Omni Reference request. Ecommerce and brand teams get a launch spot of up to 30 seconds with product and talent kept consistent.
Short Dramas with a Recurring Cast
Can a character carry a whole series? Save faces and voices as subject assets, then reuse them in every new scene so short drama creators keep each cast member recognizable between episodes.
Trend Remixes for Social and UGC
Start from a video that already performs and keep its pacing, framing, and camera moves. Kling 4 swaps in your product or character, giving social teams fresh clips without writing from scratch.
Campaign Revisions on Existing Footage
If a background, character, or style needs to change, revise the clip you already have. Kling 4 replaces people and settings or removes stray elements while the rest of the take stays intact.
Video Generation Inside Your Product
Developers wire the Kling 4 API into SaaS tools, apps, and agent workflows that render video on demand. All four endpoints share one key, so batch jobs and user requests run through one integration.
Kling V4 and Alternative Video APIs Compared
Compare Kling V4 generation and editing endpoints with Seedance and Wan alternatives by creative controls, video duration, and standard starting price.
| Model | Creative Controls | Output Duration | Standard Starting Price |
|---|---|---|---|
| Kling Video 4.0 Text-to-Video | Describe scenes through text, with 21:9 cinematic framing | 3 to 30 seconds | $0.11/second |
| Kling Video 4.0 Image-to-Video | Guide motion with up to 10 keyframes and first and last frame control | 3 to 30 seconds | $0.11/second |
| Kling Video 4.0 Reference-to-Video | Combine up to 15 references across images, videos, subjects, and voices | 3 to 30 seconds | $0.11/second |
| Kling Video 4.0 Video-Edit | Restyle, replace, or add content using text and optional reference assets | - | $0.11/second |
| Seedance 2.5 Reference-to-Video | Build sequences from up to 50 references: 30 images, 10 videos, and 10 audio clips | 4 to 30 seconds, or automatic | $0.167/second |
| Wan-3.0 Reference-to-video | Supply up to 20 references spanning images, videos, and audio | 2 to 30 seconds; video input and output share a 30-second limit | $0.05/second |
How to Use Kling 4.0 on Atlas Cloud
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Create an Atlas Cloud Account
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Why Use Kling 4.0 on Atlas Cloud
Combining the advanced Kling 4.0 models with Atlas Cloud's GPU-accelerated platform provides unmatched performance, scalability, and developer experience.
Performance & flexibility
Low Latency:
GPU-optimized inference for real-time reasoning.
Unified API:
Run Kling 4.0, GPT, Gemini, and DeepSeek with one integration.
Transparent Pricing:
Predictable per-token billing with serverless options.
Enterprise & Scale
Developer Experience:
SDKs, analytics, fine-tuning tools, and templates.
Reliability:
99.99% uptime, RBAC, and compliance-ready logging.
Security & Compliance:
SOC 2 Type II, HIPAA alignment, data sovereignty in US.
Kling 4.0 API FAQ
Kling 4, also called Kling 4.0, is the video model Kuaishou released to all users on October 15, 2026. It generates up to 30 seconds of video with stereo audio from text, images, keyframes, or mixed references, and it can edit existing footage. Atlas Cloud lists it as Kling V4 and serves it through the Kling 4 API.
Yes. The Kling 4 API is live on Atlas Cloud with four endpoints for text-to-video, image-to-video, reference-to-video, and video editing. You can call any of them with your existing Atlas Cloud API key.
Create an Atlas Cloud account, generate an API key, and pick the endpoint that matches your task. For prompt-based generation, the model ID is kwaivgi/kling-v4.0/text-to-video. Follow the request schema on that model’s page, then submit a short test clip before scaling up.
The Kling 4.0 API on Atlas Cloud starts at $0.11 per second of video, 30% below the $0.157 list price. Billing is pay-as-you-go with no subscription. To budget a project, multiply the clip length by the per-second rate and allow for a few retakes per usable shot.
Kling 4 generates clips from 3 to 30 seconds in a single pass on the text-to-video, image-to-video, and reference-to-video endpoints. Longer takes leave room for dialogue, action, and scene changes without stitching separate generations. For video editing, input clips can total up to 30 seconds.
Not yet. Kuaishou has announced 4K output and 10-bit HDR at 1080p and 4K, but its release notes list them as coming soon. The Kling 4 API on Atlas Cloud currently outputs 720p and 1080p, so check each endpoint’s output settings for the resolutions available today.
Omni Reference accepts up to 15 assets in one Kling 4 request. That can include up to 10 images, up to 5 videos with a combined length of 30 seconds, and up to 7 subjects, of which up to 3 can be built from video. Voice references attach to subjects, so a character can keep the same voice across clips.
Keyframes fix what the frame looks like at specific moments, so the model fills in the motion between them. Reference assets describe what should appear, such as a character, product, style, or camera move, without pinning it to a point in time. Use the image-to-video endpoint for keyframes and the reference-to-video endpoint for Omni Reference.
Yes. Kling 4 generates two-channel stereo audio with the video, including dialogue, sound effects, and ambience, with improved lip sync. Dialogue supports Chinese, English, Japanese, Korean, Spanish, Portuguese, German, French, Hindi, and more, plus accents such as Cantonese and British English.
Kling 4 Flash is a faster tier for drafts, limited to 3 to 20 seconds at 720p in 8-bit SDR. The full Kling 4 model runs up to 30 seconds, supports up to 10 keyframes, and handles video editing. See the difference in details on Kling 4 Full VS Kling Flash.
Kling 4 doubles the maximum clip length from 15 to 30 seconds and adds multi-keyframe control with up to 10 keyframe images. Omni Reference grows to 15 combined assets, audio moves from a single channel to two-channel stereo, and dialogue gains Portuguese, German, French, and Hindi. Kling 3 remains available on Atlas Cloud for existing workflows.
Build each character as a subject from several clear images, ideally front, side, and back views, rather than a single photo. Reuse the same subject across scenes and add keyframes when a pose or outfit must stay fixed. Side views and wide shots are where drift most often appears, so test those angles before a full Kling 4 API batch run. For a step-by-step workflow, see our Kling 4 character consistency guide.
Explore More Families
Kling 4.0
The Kling 4 API delivers Kling 4.0, the video model Kuaishou released on October 15, 2026. It generates up to 30 seconds in a single pass, follows up to 10 keyframes, blends 15 images, videos, and subjects through Omni Reference, and adds stereo audio with lip sync. Atlas Cloud serves all four endpoints, including video editing, on one OpenAI-compatible key from $0.11 per second. Start building today.
Seedance 2.5
The Seedance 2.5 API gives developers ByteDance Seed’s joint audio and video model, generating 4 to 30 seconds in one pass from text, a first frame, or up to 50 references across images, video, and audio. It edits selected regions, extends clips, and follows white-model and green-screen inputs. Atlas Cloud, an authorized U.S. reseller, adds a 480p draft mode, native 1080p finals, and enhanced 4K delivery with pay-as-you-go pricing.
Wan 3.0
Wan 3.0 API is the next generation of Alibaba's Wan video family, built to push long-form generation, multi-reference control, and audiovisual quality to new heights. Atlas Cloud already hosts Wan 2.7, 2.6, and 2.5, and Wan 3.0 runs on the same unified key with no separate setup. Start building today. Scroll down to the showcase to see what Wan 3.0 can create.
MiniMax H3
MiniMax H3 is MiniMax's multimodal video family for text, image, and reference guided creation. Across supported routes, it preserves subjects from reference media, offers flexible aspect ratios, and pairs generated sound with visuals through H3 Developer, with output profiles selected by endpoint. Atlas Cloud unifies the family behind one OpenAI-compatible key with transparent pay-as-you-go pricing from the standard rate of $0.038 per second. Start building today.
GPT Image 2.5
GPT Image 2.5 is OpenAI’s image generation and editing model, released on September 8, 2026 in two API versions. Flare is the default, with up to 50% lower latency than GPT Image 2, while Sunburst takes longer to give finer control over detailed edits. Both support up to 16 reference images, five quality tiers, transparent backgrounds, and custom sizes up to 3840px. Atlas Cloud serves the GPT Image 2.5 API at OpenAI’s per token rates, or at a flat price per image by 1K, 2K, or 4K tier.
Seedream 5.0 Pro
Seedream 5.0 Pro API gives developers ByteDance's controllable image editing model on Atlas Cloud. It places edits precisely with anchors and coordinates, separates images into editable layers, fuses multiple references, and matches exact colors and materials, with multilingual text at 2K and 3K. On Atlas Cloud you reach it through one key!
Seedance 2.0
Seedance 2.0 is ByteDance’s production video model for precise shot creation. Turn prompts into video, animate a first-frame image with optional last-frame guidance, or shape results with reference media and optional web search. Atlas Cloud brings these workflows into one unified API with transparent pay-as-you-go pricing and one OpenAI-compatible key. Start building today.
Kling V3.0
From Kuaishou, the Kling V3 API family supports text, image, and reference video workflows. Transfer motion while preserving character identity, guide generation with visual references, and edit videos through natural language commands. Atlas Cloud offers Standard and Pro endpoints for different production needs. Update: Kling V4 is now available on Atlas Cloud. Explore it on the[Kling V4](https://www.atlascloud.ai/zh/models/kling-v4) page.
Grok Imagine Video
Grok Imagine Video gives developers access to xAI’s video family for creating, animating, extending, and editing clips. Generate 1 to 15 second videos from prompts, guide people, objects, or styles with up to seven reference images, and work at 480p or 720p. Atlas Cloud brings these capabilities together through OpenAI-compatible endpoints with transparent pay-as-you-go pricing. Start building today.
Vidu Q4 Preview
Vidu Q4 is Vidu's latest flagship video model, designed for image-to-video and reference-to-video generation. It can animate a single still image and create automatic scene transitions, giving developers two input paths for different product workflows. Atlas Cloud provides dedicated API endpoints with published parameter schemas at the verified standard price of $0.04 per second. Start building today.
Gemini Omni 1.1 Flash
Gemini Omni 1.1 Flash is Google DeepMind’s natively multimodal video family for flexible production workflows. Edit existing footage through text instructions, maintain visual consistency with up to 10 reference images and 3 video clips, or extend a shot in chainable segments to 40 seconds. Access every workflow on Atlas Cloud with one OpenAI-compatible API key, pay-as-you-go pricing, and Day-0 availability. Start building today.
Nano Banana 2.1
Nano Banana 2.1 is Google's image model family built on Gemini 3.6 Flash. It delivers Pro-level generation and editing at Flash-level speed, supports natural-language edits and merges across 1 to 14 input images, and maintains consistency for up to 4 characters and 10 objects. Through Atlas Cloud, developers can access the family with one OpenAI-compatible key, reliable uptime, and Day-0 availability. Start building today.
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