Overview
What kling-4.ai is, what you can generate, and the fastest way to get your first video — in the browser or over the API.
What is kling-4.ai?
kling-4.ai is an independent generation platform built around the Kling model series — we provide hosted access with our own generation pipeline, a daily free tier, and an HTTP API. We are not the official Kuaishou site.
Two ways to use the platform:
- The web generator. Open the generator, type a prompt, get a video. One free generation per day, no account needed.
- The HTTP API. Create videos programmatically with an approved API key — same pipeline, same models. Start with the API overview.
Generate your first video (browser)
- Open the generator and describe your scene — subject, action, camera move, lighting. Something like "handheld close-up of a barista pouring latte art, warm morning window light, shallow depth of field" is plenty.
- Optionally attach a reference image to lock a face, product, or location.
- Hit Generate for Free. The render lands in your history, where you can preview and download it.
No credit card required for the daily browser trial. If you need higher volume, contact us and we'll help choose the right plan.
Generate your first video (API)
API key access is rolling out during v1. If you already have a key, call the API like this; if not, contact us and we'll enable access for your workspace:
curl -X POST 'https://kling-4.ai/api/ai-video/jobs' \
-H 'x-api-key: YOUR_API_KEY' \
-H 'Content-Type: application/json' \
-d '{
"prompt": "A cinematic sunrise over a glass city, slow drone push-in",
"parameters": { "duration": 5, "aspectRatio": "16:9" }
}'Generation is asynchronous: the call returns a job with status: "queued", and you poll GET /api/ai-video/jobs/{id} until it's completed. The full walkthrough lives in the API quick start.
Learn the craft
The specs get you started; prompt structure gets you good results. Our working notes are on the blog:
- Kling 4.0 Complete Guide — features, pricing, and the free tier, in one place.
- Multi-Shot Prompt Guide — the six-block prompt structure behind our gallery clips.
- Kling 4.0 vs Seedance 2.5 — an honest comparison of where each model wins.
Support
Something broken, or a question the docs don't answer? Reach us via the contact page and we'll get back to you.