Kling o3 Pro API: fal.ai's video-generation model, one key away
Kling o3 Pro via the ApexApi gateway
The o3 Kling line at Pro tier, animating a supplied still. Priced level with Kling 3.0 Pro, so worth A/B testing on your own footage. Call it through ApexApi's unified, OpenAI-compatible API with one `ak-` key, alongside every other model in the catalog. Pricing is $0.134–$0.202/sec per second, billed pay-per-use from your credit balance with no subscription.
Kling o3 Pro is served through ApexApi's unified, OpenAI-compatible API. One key, one format, with smart routing and automatic failover. Provider: fal.ai.
Why Kling o3 Pro
AI video generation
Text-to-video (and image-to-video where supported) via a simple async job.
Per-second pricing ($0.134–$0.202/sec)
Pay only for what you generate from your credit balance. No subscription.
OpenAI-compatible
Drop-in with any OpenAI SDK. Change the base URL and key, keep your code.
Specifications
- Modality
- video
- Context window
- —
- Max output
- —
- Streaming
- —
- Tool / function calling
- —
- Vision input
- —
Kling o3 Pro pricing
- That makes it the 9th cheapest of the 32 video models we serve, ranked on output price.
- It runs 2.5× cheaper than Kling 2.0 Master Text-to-Video, the pricier option from the same maker.
Getting started with Kling o3 Pro
OpenAI-compatible. Point your client at ApexApi, swap your key, and call it. No new SDK to learn.
import requests, time
job = requests.post(
"https://api.apexapi.dev/v1/videos/generations",
headers={"Authorization": "Bearer <YOUR_APEXAPI_KEY>"},
json={"model": "kuaishou/kling-video/o3/pro/image-to-video", "prompt": "A drone shot over a neon city at night", "duration": 5},
).json()
# Poll until the async job completes
while True:
res = requests.get(
f"https://api.apexapi.dev/v1/videos/generations/{job['id']}",
headers={"Authorization": "Bearer <YOUR_APEXAPI_KEY>"},
).json()
if res["status"] in ("completed", "failed"):
print(res)
break
time.sleep(3)Kling o3 Pro use cases
What teams build with Kling o3 Pro on ApexApi.
Short-form content
Generate clips for social, ads, and marketing.
Product & explainer
Turn prompts or images into motion for launches and demos.
Creative prototyping
Explore video concepts fast before a full production.
Kling o3 Pro vs other models
How it compares, and on ApexApi you can switch between any of them with a single string change, same key, same endpoint.
Kling o3 Pro vs Veo 3.1
Compare Kling o3 Pro against this model on price, capabilities, and latency. A/B them with a single key on ApexApi.
Learn more about Veo 3.1 API →Kling o3 Pro vs Seedance 2.0
Compare Kling o3 Pro against this model on price, capabilities, and latency. A/B them with a single key on ApexApi.
Learn more about Seedance 2.0 API →Kling o3 Pro API: FAQ
How do I call Kling o3 Pro through ApexApi?
Create an ApexApi key, point your client at https://api.apexapi.dev/v1, and POST to /v1/videos/generations with the model set to `kuaishou/kling-video/o3/pro/image-to-video`. The API is OpenAI-compatible, so an existing OpenAI SDK works once you change the base URL and key.
How much does Kling o3 Pro cost on ApexApi?
$0.134–$0.202/sec, billed per second with no subscription or minimum. The exact figure is shown before you generate, so nothing is charged against a price you have not seen.
What do I send to Kling o3 Pro?
This variant takes a still image to use as the first frame, plus a prompt describing the motion. The other variants of the same model accept different inputs, so pick the slug that matches what you already have.
What should I use instead of Kling o3 Pro?
From the same maker, Kling 3 Pro Motion Control is the step up when this one falls short. Switching is one string: it runs on the same endpoint and the same key, so there is nothing to re-integrate.
Ready to build with Kling o3 Pro?
One API key. Every major AI model. Pay only for what you use.
Get your API key, free to start