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02
Examples
Real outputs from the public examples of this model on Replicate, with the prompt and settings that produced them. They were not generated live on this page.
Prompt
First-person POV of a roller coaster plunging into the mouth of an erupting volcano. The track spirals down through rivers of glowing orange lava, sparks and embers flying past the camera. The coaster banks hard around a pillar of molten rock, then launches upward through a vent, bursting out of the volcano's crater into a dazzling sunset sky above the clouds. Wind roaring, riders screaming with excitement, the deep rumble of the volcano.
Length: 0:08
Settings
aspect_ratio
16:9
duration
15
mode
pro
Prompt
Bamse, the world's strongest bear, a cartoon brown bear wearing blue overalls and a blue knit cap, lifts an enormous boulder over his head and hurls it across a sunny Swedish meadow. Wildflowers scatter in the wind. His friends, a small rabbit and a turtle with a shell full of gadgets, cheer from behind a wooden fence. Bright, colorful 2D animation style with thick outlines. Cheerful music, a triumphant fanfare, birds chirping.
Length: 0:08
Settings
aspect_ratio
16:9
duration
10
mode
pro
Prompt
Cinematic drone footage of a dragon made of living fire soaring over a frozen Nordic fjord at twilight. Its wings trail streams of flame that melt the ice below, creating swirling clouds of steam. The dragon banks sharply and breathes a column of fire across the mountainside, igniting the snow in brilliant orange and gold. Northern lights shimmer green and purple in the sky above. Thunderous wingbeats, crackling fire, hissing steam, a deep otherworldly growl.
Length: 0:08
Settings
aspect_ratio
16:9
duration
15
mode
pro
Example prompts
Examples from the Railwail catalog. They were not generated live on this page.
Action
Length: 0:10
Parkour athlete on rooftops at sunset
03
About Kling v3
TL;DRAs of September 23, 2026
Kling v3 is a model by Kuaishou (Kling) in the Video generation category. On Railwail, Kling v3 costs $0.2688 per second of video. Depending on the settings, the price ranges from $0.2016/s to $0.504/s. A default run of 5 seconds costs $1.344. Supported aspect ratios: 16:9, 9:16, and 1:1. Possible lengths: 3, 5, 10, or 15 s.
Background
About Kuaishou Technology
Founded 2011 · Beijing, China
Kuaishou Technology, founded in 2011 by Su Hua and Cheng Yixiao, is one of China's two dominant short-video platforms, with ~700M monthly active users in 2025. Its KLING AI team shipped Kling 1.0 in June 2024, Kling 1.5 and 1.6 (late 2024), Kling 2.0 (Q1 2025) and Kling v3 (mid-2025). Kling v3 introduced native synchronized audio (sound effects and dialogue), 1080p+ at 30 fps, much improved motion physics, and the Omni multimodal-conditioning variant. The model is exposed via klingai.com, the Kling mobile app and a commercial API and is widely used by Chinese ad agencies, music labels and social-media creators.
Diffusion Transformer (DiT) with 3D spatio-temporal VAE and joint audio-video diffusion
Kling v3 is a closed-source video diffusion model built on Kuaishou's third-generation Diffusion Transformer architecture. The denoiser operates on a 3D spatio-temporal latent produced by a high-compression VAE and uses full 3D spatio-temporal attention rather than factorised attention. v3's headline change is a joint audio-video diffusion module that generates synchronized soundtrack (ambient sound, footsteps, music swells and short dialogue) aligned to the visual track. Text conditioning uses a bilingual LLM encoder with extended context for very long prompts; image conditioning supports first-frame, end-frame and subject-reference modes. Training uses a curated multi-billion-clip corpus (including platform data) with synthetic dense audio-visual captions; post-training combines reward-model alignment for visual aesthetics, prompt fidelity and audio-video sync.
Parameters
Undisclosed
Capabilities
Text-to-video, image-to-video and subject-reference modes
1080p / 30 fps clips up to 10 seconds natively, extendable beyond 1 minute
Synchronized native audio (ambient sound, simple dialogue, music swells)
Director-style camera control (lenses, rigs, moves)
Strong physics on water, fabric, hair and crowd dynamics
Bilingual Chinese/English prompts with extended context
Lip-sync and motion-brush in Kling editor
Commercial API and Kling editor integration
Best for: cinematic shorts, ads with audio, music videos, character-driven content.
Training & license
Closed multi-billion-clip corpus combining licensed video, web video and Kuaishou platform data, with dense audio-visual captions; exact size undisclosed.
License: Proprietary commercial licence via Kling AI / Kuaishou terms; commercial use on paid plans.
Safety testing: NSFW, CSAM, public-figure, copyright and politically sensitive content filters in line with CAC rules; stricter moderation on Chinese surfaces; audio module includes anti-impersonation checks.
Known limitations
10-second native clip limit
Audio quality is short-form (limited length and music sophistication)
curl https://railwail.com/api/v1/videos/generations \
-H "Authorization: Bearer $RAILWAIL_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "kling-v3",
"prompt": "A slow drone shot over a misty pine forest at sunrise"
}'
# Response: {"job_id": "...", "status": "queued", ...}
# Poll until status is completed, failed or cancelled:
curl https://railwail.com/api/v1/jobs/JOB_ID \
-H "Authorization: Bearer $RAILWAIL_API_KEY"
import os
import time
import requests
API = "https://railwail.com/api/v1"
headers = {"Authorization": f"Bearer {os.environ['RAILWAIL_API_KEY']}"}
job = requests.post(
f"{API}/videos/generations",
headers=headers,
json={
"model": "kling-v3",
"prompt": "A slow drone shot over a misty pine forest at sunrise",
},
).json()
while True:
status = requests.get(f"{API}/jobs/{job['job_id']}", headers=headers).json()
if status["status"] in ("completed", "failed", "cancelled"):
break
time.sleep(5)
print(status["status"], status.get("output_url"))
const API = "https://railwail.com/api/v1";
const headers = {
Authorization: `Bearer ${process.env.RAILWAIL_API_KEY}`,
"Content-Type": "application/json",
};
const job = await fetch(`${API}/videos/generations`, {
method: "POST",
headers,
body: JSON.stringify({
model: "kling-v3",
prompt: "A slow drone shot over a misty pine forest at sunrise"
}),
}).then((r) => r.json());
let status;
do {
await new Promise((r) => setTimeout(r, 5000));
status = await fetch(`${API}/jobs/${job.job_id}`, { headers }).then((r) => r.json());
} while (!["completed", "failed", "cancelled"].includes(status.status));
console.log(status.status, status.output_url);
Kling v3 is a model by Kuaishou (Kling) in the Video generation category. On Railwail you can call it with an API key through the Railwail API.
How much does Kling v3 cost on Railwail?
On Railwail, Kling v3 costs $0.2688 per second of video. Depending on the settings, the price ranges from $0.2016/s to $0.504/s. A default run of 5 seconds costs $1.344. The price is known before the run starts. Usage is paid from prepaid credits; 1 credit equals $0.01.
Which settings does Kling v3 support?
According to its input schema, Kling v3 knows these parameters: prompt, duration (3, 5, 10, or 15), end_image, start_image, and aspect_ratio (16:9, 9:16, or 1:1).
How fast is Kling v3?
There are not enough measured runs of Kling v3 on Railwail yet to state a run time. It depends on the input, the settings and the load at the provider.
Is Kling v3 better than Google Veo 3.1?
That depends on the task. Kling v3 (Kuaishou (Kling)) and Google Veo 3.1 (Google DeepMind) are both models in the Video generation category. The comparison page shows their prices and specifications side by side.
Create a Railwail API key and send your request with the model ID kling-v3. Code examples for curl, Python and JavaScript are in the API section of this page.
