README
Kling 4.0 API – Create 30s 4K Kling AI Videos on Kie AI
Build with Kling 4.0 API for realistic motion, synchronized audio, Omni Reference, up to 30-second video generation, and 4K output. Try Kling 4.0 online with new-user credits, then integrate the API into your apps and AI video workflows.
Explore Key Kling 4.0 API Capabilities on Kie AI
Professional Audio-Visual Performance with Kling 4.0 AI
Create more lifelike Kling 4.0 AI videos with stable dynamic motion and immersive audio. Kling 4.0 handles high-speed movement, continuous action, tracking shots, orbit shots, and complex camera motion while keeping scenes smooth and stable. Improved Lip Sync keeps voices and performances naturally synchronized, while two-channel stereo, realistic lighting, detailed textures, and more expressive characters bring greater realism to every scene.
Greater Creative Control with Kling 4.0 Omni Reference
Use Omni Reference to give Kling 4.0 AI video generation more precise visual and motion guidance. Kling 4.0 supports up to 15 reference items across images, videos, voice references, and subjects. Combine references to control characters, products, actions, camera movement, composition, visual styles, and narrative pacing while maintaining stronger consistency across the generated video.
30-Second Storytelling with Multi-Keyframe Control
Tell longer and more complete stories with the Kling 4.0 API, supporting video generation from 3 to 30 seconds. Kling 4.0 can maintain continuous actions and narrative development across longer sequences, while up to 10 keyframes give you precise control over important character states, scene changes, and story beats. Prompts of up to 8,000 tokens provide even more room to describe complex creative ideas.
Generate High-Resolution Kling 4.0 AI Videos up to 4K
Bring more detail to Kling 4.0 AI video with support for 720p, 1080p, and 4K resolution. Kling 4.0 also lists 10-bit HDR for 1080p and 4K output, providing richer color and smoother transitions between highlights and shadows. Support for 21:9 ultrawide, 16:9, 1:1, and 9:16 aspect ratios gives creators more flexibility for cinematic, social, and vertical video formats.
Create Diverse Content with Kling 4.0 AI Video Generator
Explore a wider creative range with the Kling 4.0 AI Video Generator, from realistic vlogs, documentaries, and product ads to animation, short dramas, music videos, claymation, and stylized 3D content. Kling 4.0 supports multiple languages, accents, and dialects, along with clearer text, emoji, and logo generation. This makes it easier to create varied visual and audio experiences across different styles, formats, and languages.
How to Use Kling 4.0 API on Kie AI
Step 1: Get Your Kie AI API Key
Step 2: Try Kling 4.0 Free in the Kie AI Playground
Step 3: Create Your Kling 4.0 AI Video
Step 4: Integrate the Kling 4.0 Video API
Compare Kling 4.0 and Kling 4.0 Flash on Kie AI
Kling 4.0 and Kling 4.0 Flash are built for different AI video generation needs. Kling 4.0 focuses on higher-quality output, longer videos, and greater creative control, while Kling 4.0 Flash prioritizes faster generation and better value for frequent creation. Kie AI provides access to both models, making it easy to choose between Kling 4.0 API and Kling 4.0 Flash based on your video quality, speed, and cost needs.
| Capability | Kling 4.0 | Kling 4.0 Flash |
|---|---|---|
| Text to Video | ✓ | ✓ |
| Image to Video | ✓ | ✓ |
| Omni Reference | ✓ | ✓ |
| Video Duration | 3–30 seconds | 3–20 seconds |
| Resolution | 720p / 1080p / 4K | 720p |
| Dynamic Range | 10-bit HDR at 1080p / 4K | 8-bit SDR |
| Multi-Keyframes | Up to 10 keyframes | — |
| Best For | Higher-quality, longer, more controlled video creation | Faster, frequent, cost-efficient video generation |
Why Use Kling 4.0 API on Kie AI
Access Kling 4.0 Through One Simple API
Connect to the Kling 4.0 API through a straightforward API workflow on Kie AI. Use a single API key and consistent integration process to access Kling 4.0 and bring advanced AI video generation into your apps, products, and automated workflows.
Try Kling 4.0 Free in the Online Playground
Explore Kling 4.0 free with new-user credits in the Kie AI online Playground. Test prompts, reference inputs, and available video settings before integrating the API. You can also check the estimated credit cost before generation, making it easier to understand usage before moving to larger workloads.
Affordable and Flexible Kling 4.0 API Pricing
Use the Kling 4.0 API with flexible, usage-based pricing that fits both experimentation and production workloads. Start small when testing Kling 4.0 AI video generation, then scale your usage as your application grows without committing to unnecessary capacity upfront.
Access Multiple Kling AI Models on Kie AI
Use multiple Kling AI models through the same platform instead of relying on a single model. Kie AI makes it easier to explore different Kling AI API options and choose the right model based on video quality, generation speed, cost, and creative requirements.
Get Faster Access to New Kling AI Models
Get access to newly supported models and model updates as the Kie AI model library continues to expand. Explore the latest Kling releases alongside other leading AI video models without rebuilding your entire integration whenever a new option becomes available.
Get Dedicated Support for Kling 4.0 API
Get responsive support when using the Kling 4.0 API on Kie AI. Whether you have questions about API integration, generation tasks, credits, or model usage, the Kie AI support team can help you troubleshoot issues and keep your Kling AI video workflows running smoothly.
What Can You Build with Kling 4.0 AI Video API
Kling 4.0 AI Video Generator Apps
Create a Kling 4.0 AI Video Generator that turns prompts and creative inputs into finished videos. Add Kling 4.0 video generation to creative SaaS products, content platforms, or specialized video tools for different audiences and workflows.
AI Advertising and Marketing Videos Powered by Kling 4.0
Build tools for product launches, social ads, campaign creatives, branded content, and other marketing formats. Kling 4.0 AI Video API can help turn campaign ideas, brand assets, and product materials into engaging promotional videos across different channels.
Character and Storytelling Tools Using Kling 4.0 Video API
Create applications for short dramas, character videos, animated stories, and cinematic content with Kling 4.0 video API. Build narrative-focused workflows that help users develop characters, scenes, and story progression across longer video sequences.
Kling 4.0 AI for Social Media Video Creation
Power tools for TikTok, YouTube Shorts, Reels, creator content, and branded social videos with Kling 4.0 AI. Turn creative ideas and visual assets into short-form videos designed for different social platforms and content formats.
E-Commerce Product Video Generators Using Kling AI API
Use Kling AI API to create product showcases, UGC-style promotions, campaign assets, and storefront videos. Turn product images and other creative assets into dynamic e-commerce content for brands, sellers, and online stores.
Automated Video Production with Kling 4.0 API
Connect Kling 4.0 API with content pipelines, AI agents, and automated systems to support repeatable video production. Generate video assets in larger volumes and automate recurring creation tasks without relying on a fully manual workflow.