Kling’s creation platform
Explore Kling 4.0’s creation modes and workflows in the official introduction and user guide.
Kling 4.0 API
KuaishouVideoEvoLink API · Prelaunch
Text to videoImage to videoKeyframe controlOmni Reference
Official release
Announced
Official API
Pending confirmation
EvoLink API
Prelaunch
Last reviewed
October 17, 2026
Kling 4.0 is Kuaishou’s AI video model for text-to-video, image-to-video and reference-led creation. It adds longer native clips, multiple keyframes and targeted video editing. Explore its creative controls and compare models through EvoLink’s unified API gateway.
Updated October 17, 2026 · Kling 4.0 API on EvoLink: prelaunch.
Register your interest in Kling 4.0
Register your interest in evaluating Kling 4.0 through EvoLink’s unified API gateway. Leave your email for launch updates, and start with the task and acceptance criteria below.
Get Kling 4.0 API launch updates by email.
Kling 4.0 API access: official channels and EvoLink
Explore Kling’s creation platform and developer resources, and follow Kling 4.0 API availability on EvoLink.
Official developer API
Follow the official API release and the creation modes available to developers.
EvoLink unified API
Kling 4.0 is in prelaunch on EvoLink. Model IDs, supported modes and pricing will be published here.
When Kling 4.0 API access opens on EvoLink, this page will include model IDs, pricing and integration examples.
Kling 4.0 controls: keyframes, references and editing
Plan your video workflow with keyframe control, multimodal references, targeted editing and native audio.
Define key shots with keyframes
Keyframe images define visual milestones along the timeline. Plan an opening composition, a product reveal and a closing frame, then describe the action between them. Use up to 10 keyframe images to guide a native clip of up to 30 seconds.
Give each reference a creative job
Omni Reference uses images, video and subjects to guide appearance, motion and style. Assign a product photograph to appearance and a source clip to camera pacing. Give each asset a clear role in the creative brief.
Revise footage around a specific change
Kling describes targeted changes to subjects, backgrounds, expressions and camera direction. For a campaign variation, specify the change and the product details that should remain. Review both the revised region and the parts you intended to preserve.
Plan dialogue and sound with the scene
Kling describes native stereo audio and lip sync. Dialogue-led clips can be planned around a transcript, delivery and ambient sound. Check the actual voice, timing and synchronization before treating an output as a finished deliverable.
Official model sources:Kling introduction · September 30Kling 4.0 user guide · October 14Kling model and workflow overview
Evaluate Kling 4.0 against a real delivery brief
Use the same assets and acceptance criteria to compare continuity, timing, revisions and cost per accepted clip.
Product and character continuity
Check packaging, logos, faces and clothing across camera changes. Count rejected clips as well as the final selection.
Storyboard and timing
Mark required events before generation. Review their order, transitions and timing rather than judging only the best frame.
Revision and audio checks
Change one target and inspect the untouched scene. For dialogue or music, check lip sync and timing; record editing work outside the model.
Cost per accepted clip
Divide total generation charges by accepted clips. Track retries, waiting time and post-production separately before comparing workflows.
What can teams build with Kling 4.0?
Explore workflows for product ads, recurring characters and campaign variations, with clear inputs and acceptance criteria.
Product ads with a planned reveal
Prepare approved product views and a sequence covering the opening, demonstration and closing composition. Choose the creation mode that fits those assets. Judge whether packaging, action and the final frame satisfy the brief across the whole clip.
Short stories featuring the same characters
Bring a character sheet, scene direction and the story moments you need to preserve. Evaluate identity and action continuity through changes of view. Keep voice and timing notes with the visual brief for dialogue-heavy scenes.
Campaign variations from existing footage
Start with an approved clip and one requested revision, such as a new setting or product treatment. Record which details must stay intact. Compare accepted outputs, retries and post-production time before choosing a route for repeated work.
Choose a current Kling route by task
Use EvoLink’s unified API gateway to evaluate an existing route for your task while Kling 4.0 API access on EvoLink is in prelaunch.
Generate a new clip
Start with Kling 3.0 for text-to-video or image-to-video. Check its supported input mode and per-second rate against your brief.
Explore Kling 3.0Compare generation time and cost
Use Kling 3.0 Turbo for a repeatable baseline. Track waiting time, retries and cost per accepted clip before changing routes.
Explore Kling 3.0 TurboUse references or edit footage
Review Kling O3 when you already have source assets. Match its reference or editing mode to the change you need.
Explore Kling O3Kling Model Family
Open a model page for supported modes, current pricing and integration details.
Plan your next step with Kling 4.0
Compare the Kling model family
Compare creation modes, inputs and pricing across current Kling routes.
Explore Kling 4.0 Flash
Review the Flash model’s workflow and follow its EvoLink API access updates.
What Is Kling 4.0? Keyframes, References & Video Editing
Understand Kling 4.0’s keyframe and reference controls, how it differs from Flash, and what video teams should evaluate before choosing a model.
Kling 4.0 questions: features, Flash and API access
What is Kling 4.0?
Kling 4.0 is Kuaishou’s video generation model. It combines text- and image-led generation, keyframe control, multimodal references and video editing. This page explores the full model’s creative controls and workflows.
How long can a Kling 4.0 video be?
Kling documents native generation from 3 to 30 seconds. Repeated video extension up to two minutes is listed as coming soon.
Can Kling 4.0 generate video from text or images?
The official user guide lists text-to-video, image-to-video, first and last frames, multiple keyframes and Omni Reference. Choose the creation mode for the inputs you have.
How do keyframes differ from Omni Reference?
Keyframes and Omni Reference run as separate creation modes. Use Keyframes to set visual moments along a timeline. Choose Omni Reference to upload reference assets that guide appearance, motion or style.
How many reference assets can Kling 4.0 use?
Kling describes a shared limit of 15 reference assets, with category limits of 10 images, 5 videos and 7 subjects. Selected assets count toward that shared total, and video references share a 30-second duration limit.
Does Kling 4.0 support 4K video and audio?
Kling’s user guide lists 720p, 1080p, 4K and two-channel stereo audio. Its feature page still marks 1080p and 4K as coming soon, so check the current resolution options in Kling before testing. 10-bit HDR is also marked as coming soon. These descriptions do not establish EvoLink API output settings.
How do Kling 4.0 and Kling 4.0 Flash differ?
Kling’s user guide describes Flash with clips up to 20 seconds at 720p, without start-and-end frames or multiple keyframes. The full model is documented for up to 30 seconds and 10 keyframe images, with separate rollout notices for higher resolutions. These are Kling-platform specifications; API support and EvoLink access must be checked separately.
How can I get Kling 4.0 API access on EvoLink?
Kling 4.0 is in prelaunch on EvoLink. Register your email for launch updates and explore current Kling routes through EvoLink’s unified API gateway.
What are the Kling 4.0 API price and model ID?
Kling 4.0 API pricing and model IDs will be published here with integration details when access opens on EvoLink.