Kling 4.0 AI Video Generator

Kling 4.0 is in Phantra: one continuous take up to 30 seconds, 720p or 1080p, with stereo sound. Vesper plans the shots from your photos, you review the plan, and nothing renders until you approve.

Kling 4.0 vs 3.0
Kling 4.0 in Phantra

Kling 4.0 Specs

What Kling 4.0 does in the studio today, as the Render card offers it.

Made by
Kling AI, Kuaishou's video model team. Kling launched 4.0 in October 2026.In Phantra since October 22, 2026, the day fal opened its Kling 4.0 API.
Length per clip
Any whole number of seconds from 3 to 30, so one continuous take can run the full 30 seconds.A scene runs 4 to 30 seconds in all, written as timed shots; each shot renders as its own clip.
Resolution
720p or 1080p, picked on the scene's Render card. 720p is the default.
Frame
The clip keeps the shape of the shot's first frame: vertical for the feed, or wide.Kling 4.0 also takes 1:1 and 21:9 when it works from text alone; Phantra renders every Kling 4.0 clip from a keyframe, so the still sets the frame.
Sound
Made with the picture, in two-channel stereo.The sound is the model's; there is no separate sound setting on the card.
How a clip starts
From the shot's keyframe: a still drawn from your reference photos, which Kling 4.0 animates.
Plans
On every plan.
Not in the studio yet
Kling 4.0 can also take an end frame, its own per-shot prompts, up to 10 keyframes, reference images and videos (Omni Reference), and edit an existing video. Phantra does not offer these yet.
Kling 4.0 vs 3.0, Seedance and Veo

Kling 4.0 vs Kling 3.0

Kling 4.0 against the other video models in the studio, as each runs in Phantra today.

Same prompt
Kling 4.0Comparison render on the way
Same prompt
Kling 3 Turbo ProComparison render on the way
SpecKling 4.0Kling 3 Turbo ProSeedance 2.5Veo 3.1
Made byKling AI (Kuaishou)Kling AI (Kuaishou)ByteDanceGoogle
Length per clip3 to 30 seconds3 to 15 seconds4 to 30 seconds4, 6 or 8 seconds
Resolution720p or 1080p1080p only480p, 720p or 1080p720p or 1080p
SoundStereo, with the pictureWith the pictureWith the pictureWith the picture
PlansEvery planEvery planEvery planEvery plan
  • Lengths and resolutions are what each model takes in the studio (its row in our model table, checked against fal's schema).
  • Kling 4.0's stereo is Kling's own launch claim. Kling 3 Turbo Pro clips also come back with a sound track, so sound alone is not the difference: length and the 720p option are.

fal: Kling 4.0 image-to-video (checked 2026-10-22)fal: Kling 3 Turbo ProThe Decoder: Kling 4.0 launch

Kling 4.0 in the Studio

  1. 01

    One take, up to 30 seconds

    Any whole number of seconds from 3 to 30 a clip, so a 30-second AI video can be one continuous take instead of stitched shots.

  2. 02

    720p or 1080p

    Pick the resolution on the scene's Render card. 720p is the default; 1080p is one pick away.

  3. 03

    Stereo sound

    Kling 4.0 makes two-channel stereo sound with the picture. There is nothing to switch on.

  4. 04

    Vesper plans the shots

    Tell Vesper, the studio's AI agent, what you're making. It plans the shots and writes the scene, and for a single 15 to 30 second take it suggests Kling 4.0. You pick the model on the card.

  5. 05

    Review the plan, approve the render

    Vesper's plan and every shot are yours to read and change first. Nothing renders until you approve it.

  6. 06

    Your photos in every keyframe

    Each shot's first frame is drawn from the people, products and places you uploaded, and Kling 4.0 animates that frame.

  7. 07

    See the first frame first

    Draw each shot's keyframe on the Render card and check the face before the clip renders.

  8. 08

    From Claude or ChatGPT

    The Phantra connector is on every plan. Add it to Claude or ChatGPT as a custom connector today and plan a Kling 4.0 scene in the chat. Nothing renders until you approve it.

  9. 09

    One MP4

    When the last shot lands, the clips are joined in order into one MP4, filed in your Library.

How Kling 4.0 Works in Phantra

  • 1. Tell Vesper the idea

    Sign up, describe the take and add your photos. Vesper plans the shots and writes the scene; for a single 15 to 30 second take it suggests Kling 4.0.

  • 2. Review the plan

    Read the shots Vesper wrote and change any of them. On the scene's Render card, choose Kling 4.0, 720p or 1080p, and the length.

  • 3. Approve to render

    Press approve and Kling 4.0 animates each shot's keyframe. Nothing renders before that click.

12 Video Generator Models

  • Kling 4.0

    Kling's newest: one continuous take up to 30 seconds, 720p or 1080p, stereo sound, strong on people.

  • Kling 3 Turbo Pro

    Quick 3 to 15 second shots at 1080p. Cinematic motion, strong on people.

  • Seedance 2.5

    ByteDance's newest, with sound, up to 30 seconds a clip at 480p, 720p or 1080p.

  • 12 Models

    Every video model the studio renders on, LTX 2.3, LTX 2.5 Fast, LTX 2.5 Pro, Wan 3.0, Seedance 2.0 Fast, Seedance 2.0, Veo 3.1, Grok Imagine 1.5, Grok Imagine 1.5 Lite included.

    See every model

Kling 4.0 FAQs

Kling 4.0

One take, thirty seconds, your photos.

Tell Vesper the idea, review the plan, approve the render.