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Kling AIVideo

Kling 4.0

3 to 30 s video with sound from text or your reference pictures, in 720p or 1080p.

Price
107 crper clip · 5 s · 720p
Usual time
≈ 4 min
Model id
video.kling-4

Playground

Playground

Reference images

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3 - 30

Aspect ratio
Resolution
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Change the settings: the price and the code follow. You need an account to run it.

A real result from Kling 4.0.

# 1. Create the job. It is charged once and refunded if it fails.
JOB_ID=$(curl -s -X POST https://mobyvid.com/api/v1/jobs \
  -H "Authorization: Bearer $STAGLIGHT_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
    "op": "video.kling-4",
    "params": {
      "prompt": "A premium product shot of a glass serum bottle on wet stone, soft window light",
      "duration": 5,
      "aspect_ratio": "9:16",
      "resolution": "720p"
    },
    "max_credits": 107
  }' | jq -r .id)

# 2. Poll until it finishes. Each call waits up to 30 seconds.
while :; do
  JOB=$(curl -s "https://mobyvid.com/api/v1/jobs/$JOB_ID?wait=30" -H "Authorization: Bearer $STAGLIGHT_API_KEY")
  case "$(echo "$JOB" | jq -r .status)" in queued|running) ;; *) break ;; esac
done

# 3. Download the result from outputs[0].download_url.
DOWNLOAD_URL=$(echo "$JOB" | jq -r '.outputs[0].download_url')
curl -L -o result.mp4 "$DOWNLOAD_URL"
import os, uuid, requests

BASE = "https://mobyvid.com/api/v1"
HEADERS = {"Authorization": f"Bearer {os.environ['STAGLIGHT_API_KEY']}"}

# 1. Create the job. It is charged once and refunded if it fails.
r = requests.post(f"{BASE}/jobs", timeout=60,
                  headers={**HEADERS, "Idempotency-Key": str(uuid.uuid4())},
                  json={
                    "op": "video.kling-4",
                    "params": {
                      "prompt": "A premium product shot of a glass serum bottle on wet stone, soft window light",
                      "duration": 5,
                      "aspect_ratio": "9:16",
                      "resolution": "720p"
                    },
                    "max_credits": 107
                  })
r.raise_for_status()
job = r.json()

# 2. Poll until it finishes. Each call waits up to 30 seconds.
while job["status"] in ("queued", "running"):
    job = requests.get(f"{BASE}/jobs/{job['id']}", headers=HEADERS,
                       params={"wait": 30}, timeout=60).json()

# 3. Download the result from outputs[0].download_url.
print(job["outputs"][0]["download_url"] if job["outputs"] else job["data"] or job["error"])
// Node 18 or newer. Save as run.mjs: top-level await needs a module.
const BASE = "https://mobyvid.com/api/v1";
const headers = { Authorization: `Bearer ${process.env.STAGLIGHT_API_KEY}` };

// 1. Create the job. It is charged once and refunded if it fails.
let res = await fetch(`${BASE}/jobs`, {
  method: "POST",
  headers: { ...headers, "Content-Type": "application/json", "Idempotency-Key": crypto.randomUUID() },
  body: JSON.stringify({
    "op": "video.kling-4",
    "params": {
      "prompt": "A premium product shot of a glass serum bottle on wet stone, soft window light",
      "duration": 5,
      "aspect_ratio": "9:16",
      "resolution": "720p"
    },
    "max_credits": 107
  }),
});
if (!res.ok) throw new Error((await res.json()).error.message);
let job = await res.json();

// 2. Poll until it finishes. Each call waits up to 30 seconds.
while (job.status === "queued" || job.status === "running") {
  job = await (await fetch(`${BASE}/jobs/${job.id}?wait=30`, { headers })).json();
}

// 3. Download the result from outputs[0].download_url.
console.log(job.outputs[0]?.download_url ?? job.data ?? job.error);
{
  "id": "job_19a2b3c4d5e6f7a8b9c0d1",
  "op": "video.kling-4",
  "status": "queued",
  "credits": 107,
  "title": "",
  "params": {
    "prompt": "A premium product shot of a glass serum bottle on wet stone, soft window light",
    "duration": 5,
    "aspect_ratio": "9:16",
    "resolution": "720p"
  },
  "progress": null,
  "outputs": [],
  "data": null,
  "error": null,
  "run_id": null,
  "source": "api",
  "created_at": "2026-11-06T12:00:00Z",
  "finished_at": null,
  "eta_seconds": 225
}

What it costs

Duration (s)720p1080p
3 s65 cr96 cr
5 s107 cr160 cr
15 s321 cr479 cr
30 s642 cr957 cr

The playground shows the exact price for your settings. A job is charged once when it is accepted, and refunded if it fails. The price is checked again with your file before it runs.

Parameters

NameTypeDefaultAllowed
promptrequiredDescription string Up to 2,500 characters
reference_imagesReference images media id[] Image, up to 10
durationDuration (s) integer 5 3 - 30
aspect_ratioAspect ratio enum 9:16 9:16, 16:9, 1:1
resolutionResolution enum 720p 720p, 1080p

Send these inside params. Files are media ids from POST /api/v1/uploads. View documentation

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