Skip to content
DER.run
Open studio
Video model · by KuaishouPro

Kling 4.0

Long shots from text or images with native audio. Makes 3–30 second clips with sound from text, a photo, or start and end frames.

  • Native audio
  • Long shots
  • Cinematic
  • Image to video
  • Text to video

From 360 credits for a 3-second clip (≈ $3.60)

Priced at 720p. Sound is always on, and the price includes it.

Try in studioAPI example
  • Sample · Kling 4.0

Kling 4.0 specs

Modes
Text to video · Image to video · Start & end frames
Duration
3–30 s, any whole second
Resolution
720p · 1080p
Aspect ratio
16:9 · 9:16 · 1:1
Audio
Always on — made with the video, and included in the price
Frames
A start image + an optional end frame
File types
PNG, JPEG, WEBP · up to 20 MB / MP4, WebM, MOV · up to 200 MB
Tier
Pro — unlocks at $5 in total top-ups · How tiers work

Kling 4.0 pricing

Pricing
From
360 credits / 3 s(≈ $3.60)
  • 5 s≈ 600 credits(≈ $6.00)
  • 10 s≈ 1,200 credits(≈ $12.00)
  • 30 s≈ 3,600 credits(≈ $36.00)

Priced at 720p. Sound is always on, and the price includes it. Estimates use the starting settings. The studio shows the exact price before you generate. Failed runs are refunded.

How it works

How to use Kling 4.0

AI video generator

  1. Pick how to start

    Open Kling 4.0 in the studio and choose a mode: text to video, image to video, or start and end frames to video.

  2. Set it up

    Describe what you want and set the options Kling 4.0 offers: 3–30 s and up to 1080p.

  3. Check the price, then generate

    The studio shows the exact price before you generate. Failed runs are refunded.

API

Kling 4.0 API

Model id kling-video. Same price and limits as the studio.

Full API docsUse with AI agents
REST · POST /v1/jobs
curl -X POST "https://api.der.run/v1/jobs" \
  -H "Authorization: Bearer $DER_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "kling-video",
    "params": {
      "model_version": "standard",
      "version": "4.0",
      "mode": "text-to-video",
      "duration": 5,
      "prompt": "…"
    }
  }'

# then poll every 20 s until it’s finished
curl "https://api.der.run/v1/jobs/{id}" \
  -H "Authorization: Bearer $DER_API_KEY"

FAQ

Kling 4.0 FAQ

How much does Kling 4.0 cost?

From 360 credits for a 3-second clip (≈ $3.60). The price changes with the length and the resolution. Sound is always on, and the price includes it. The studio shows the exact price before you generate, and there is no subscription. See how pricing works.

Does Kling 4.0 have an API?

Yes. Call Kling 4.0 with model id kling-video over the REST API or the MCP server, with the same credits and limits as the studio. See the API docs.

How long can a Kling 4.0 video be?

Any whole number of seconds from 3 to 30. Longer clips cost more — the studio shows the price first.

Do I need Pro or Max for Kling 4.0?

Kling 4.0 needs Pro. It unlocks once your top-ups reach $5 in total — there’s no subscription.

How long are my videos kept?

7 days. Keep the ones you want in your Library (up to 200) so they don’t expire.
All questions

Other Kling versions

What each one does differently from Kling 4.0.

All Kling versions
  • Kling 3.0From 32 credits for a 3-second clip (≈ $0.32) · 3–15 s · up to 4K · no tier needed
  • Kling 3.0 OmniText and reference to video · From 32 credits for a 3-second clip (≈ $0.32) · 3–15 s
  • Kling 3.0 FastFrom 45 credits for a 3-second clip (≈ $0.45) · 3–15 s · no tier needed
  • Kling 3.0 ImageText to image and editing · From 30 credits per image (≈ $0.30) · up to 2K · no tier needed
  • Kling 2.6From 150 credits for a 5-second clip (≈ $1.50) · 5 or 10 s · no tier needed

Other video models

All models

Make your next clip

Kling 4.0 · 3–30 s · From 360 credits / 3 s

Try Kling 4.0