Kling 4.0 Edit
Kling 4.0 Edit costs $0.1128/s (720p) on FairStack · a video to video model for Background and wardrobe swaps, Restyling existing footage. No subscription required. Pay per generation with full REST API access. FairStack applies a transparent 20% margin on infrastructure cost so you always see the real price.
What is Kling 4.0 Edit?
Kling 4.0 Edit changes an existing clip from a text instruction: swap a background, change a costume, restyle a scene. Give it one source video (3 to 30 seconds) and up to 4 reference images, mention the source as @video_1, and pick the output length (3 to 30 seconds) and resolution (720p or 1080p). Priced per second at the resolution you pick: the provider's rate plus a flat 20% platform fee, shown before you spend. The bill counts the source clip's length as well as the output's (at least twice the output), as the provider bills it.
Key Features
What are Kling 4.0 Edit's strengths?
What are Kling 4.0 Edit's limitations?
What is Kling 4.0 Edit best for?
How much does Kling 4.0 Edit cost?
How does Kling 4.0 Edit perform across capabilities?
Estimated from the Kling 4.0 launch notes, not benchmark-verified (PRD-1229)
How do I use the Kling 4.0 Edit API?
curl -X POST https://api.fairstack.ai/v1/generations/video \
-H "Authorization: Bearer $FAIRSTACK_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "kling-4-0-v2v-edit",
"input": {
"prompt": "Your prompt here",
"video_url": "https://example.com/source-video.mp4"
}
}'import os
import requests
response = requests.post(
"https://api.fairstack.ai/v1/generations/video",
headers={
"Authorization": f"Bearer {os.environ['FAIRSTACK_API_KEY']}",
"Content-Type": "application/json",
},
json={
"model": "kling-4-0-v2v-edit",
"input": {
"prompt": "Your prompt here",
"video_url": "https://example.com/source-video.mp4"
}
},
)
result = response.json()
print(result["data"])const response = await fetch("https://api.fairstack.ai/v1/generations/video", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.FAIRSTACK_API_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
"model": "kling-4-0-v2v-edit",
"input": {
"prompt": "Your prompt here",
"video_url": "https://example.com/source-video.mp4"
}
}),
});
const result = await response.json();
console.log(result.data);What parameters does Kling 4.0 Edit support?
Frequently Asked Questions
How much does Kling 4.0 Edit cost?
Kling 4.0 Edit costs $0.1128/s (720p) on FairStack as of 2026-11-10. This price includes FairStack's transparent 20% margin on infrastructure cost. No subscription or monthly fee — you pay per generation only. Minimum deposit is $1.
What is Kling 4.0 Edit and what is it best for?
Kling 4.0 Edit changes an existing clip from a text instruction: swap a background, change a costume, restyle a scene. Give it one source video (3 to 30 seconds) and up to 4 reference images, mention the source as @video_1, and pick the output length (3 to 30 seconds) and resolution (720p or 1080p). Priced per second at the resolution you pick: the provider's rate plus a flat 20% platform fee, shown before you spend. The bill counts the source clip's length as well as the output's (at least twice the output), as the provider bills it. Kling 4.0 Edit is best for Background and wardrobe swaps, Restyling existing footage. Available via FairStack's REST API with curl, Python, and Node.js SDKs.
Does Kling 4.0 Edit have an API?
Yes. Kling 4.0 Edit is available via FairStack's REST API at api.fairstack.ai. Send a POST request to /v1/generations/video with your API key, the model key, and an input object (input.prompt). Works with curl, Python requests, Node.js fetch, and any HTTP client. No SDK installation required.
How does Kling 4.0 Edit compare to other video models?
Kling 4.0 Edit excels at Background and wardrobe swaps, Restyling existing footage. It is a video to video model priced at $0.1128/s (720p) on FairStack. Key strengths: Keeps the source's motion and framing, Reference images for the new look. Compare all video models at fairstack.ai/models.