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Kling 4.0 is the public name of kling-4.ai, a browser workspace generating short video clips from text prompts and images using Kling video models supplied by third-party providers. Despite the name, the site is explicit that Kling 4.0 generation is not available on this website, and that it currently provides Kling 2.6 and Kling 3.0 Omni.
kling-4.ai is an independently operated online service, not affiliated with, sponsored by or endorsed by Kuaishou Technology or the official Kling AI product. It also discloses that earlier claims in its own guide about verified Kling 4.0 features and free access were incorrect and have been withdrawn.
That retraction matters most if you arrived searching for a Kling 4.0 release. The models you can run belong to the 3.0 generation: Kuaishou announced the Kling AI 3.0 family on February 5, 2026, covering Video 3.0, Video 3.0 Omni, Image 3.0 and Image 3.0 Omni, with clip duration extended to fifteen seconds and native audio across multiple languages, dialects and accents.
The workspace advertises daily free credits with no account needed, and no credit card for the daily browser trial. Eligible visitors claim free credits and generate with supported settings covered by their balance. Reference images work without authentication, but Feature Video uploads require Google sign-in.
The workspace exposes two routes. Kling 2.6 is the compact option: five or ten second clips at 720p and 1080p, with start and end frames as the main reference mechanism. Kling 3.0 Omni is the directed option, accepting text, images, reusable Elements, motion references, frames, storyboards and audio direction in one workflow, where supported tasks use durations from 3 to 15 seconds with landscape, portrait or square formats and 720P and 1080P output.
A global prompt establishes continuity across a sequence while shot prompts define only that beat. Reference channels are not freely additive: use either ordinary image URLs or role-based images for one task, not both.
The launch version follows APIMart capabilities and omits a permanent voice asset system and Base Video Editing from the free workflow. Native audio exists on supported configurations, but compatibility depends on the model and references in play.
The documented browser path is short. Open the generator, describe your scene — subject, action, camera move, lighting — optionally attach a reference image, review the displayed credit cost and select Continue to Create. Job endpoint calls are asynchronous, returning a job with status queued that you poll until it reports completed.
The platform publishes a six-block prompt order matching those controls:
Camera language should be concrete. The working vocabulary covers push-in, pull-back, pan up and down, low angle, tracking shot, curved arc, locked-off, handheld weight, rack focus and shallow depth of field. It treats "epic", "cinematic" alone, "high quality" and "masterpiece" as outdated approaches that do not steer the model.
Pacing is where timestamp discipline pays off. Commercials cut fast early and hold long on the product, so a shot list gives the hook two seconds and the product macro four. Durations must add up to the total generation duration, which on the launch preset is ten seconds.
Each reference channel has its own sentence shape. A character Element prompt names the person from Element 1 and tells the model to preserve their facial identity, hairstyle, and wardrobe across every shot.
The platform's selection guidance is the fastest way to pick a route. A standard Kling 3.0 workflow fits when the scene is primarily text-to-video, when one source image already defines subject and composition, when you want a single continuous action, and when setup speed matters more than timeline detail.
Omni earns its extra setup when the concept has dependencies: the same character must stay recognizable after a cut, a product must be understood from several views, movement should follow a reference video, a 10-second clip needs two or more distinct beats, or camera direction changes between shots.
That maps onto three patterns:
Short-form clips, ads and product shots dominate what readers bring to Kling-class generators in 2026, so identity and frame controls matter more here than raw clip length.
Fit turns on three questions: whether you need an account, whether you need a guaranteed commercial licence, and whether fifteen seconds suffices.
This is a browser product with a developer surface attached; no desktop or mobile application is documented. The workspace runs at the site root, with separate routes for the Omni model page, documentation, blog and pricing, plus an assets area holding stored outputs.
Programmatic access exists but is gated. API key access is rolling out during v1, and users without a key are told to contact the operator to enable it for their workspace. Because jobs are queued and polled rather than returned synchronously, any integration needs a status loop, not a single blocking call.
Authentication is layered rather than all-or-nothing: browsing and reference-image generation work anonymously on free credits, while Feature Video uploads require Google sign-in.
The pricing page publishes a full ladder with a caveat printed on the page: paid subscriptions are not available yet, the plans shown are a preview, and clicking Subscribe Now will not charge you.
| Plan | Listed price | Monthly credits | Stated video volume | Notable inclusions |
|---|---|---|---|---|
| Free | $0 | Welcome credits | Not stated | Text and image to video, Kling 2.6 and 3.0 Omni, private history, standard speed |
| Pro (monthly) | $29.9/mo | 2,000 | Up to 30 | 1080p/4K, watermark-free export, commercial rights, unlimited queue, accelerated generation |
| Ultra (monthly) | $49.9/mo | 4,000 | Up to 60 | Same inclusions as Pro |
| Lite (annual) | $8.33/mo, billed $100/yr | 417 | Up to 75 | Same paid-tier inclusions |
| Pro (annual) | $24.0/mo, billed $288/yr | 2,000 | Up to 357 | 20% below monthly Pro |
| Ultra (annual) | $30.0/mo, billed $360/yr | 4,000 | Up to 714 | 40% below monthly Ultra |
Two things the table cannot express matter more than the numbers. The credit meter is per configuration, not per tier, so the same allowance buys very different volumes depending on resolution, duration and audio. And the annual video-volume figures are far larger than the monthly ones at identical credit allowances, so the two sets count different configurations.
On the free tier the boundary is drawn by preset, not quota. The documented free launch configuration is 720P, 10 seconds, no audio, no watermark, while 1080P and native audio are labelled as requiring credits and 4K is hidden until the credit system is ready. Once purchases go live, completed purchases are generally final and non-refundable except where required by law.
Because this workspace is a front end rather than a model owner, the comparison that matters is against other hosted routes to comparable engines. Independent software directories catalogue more than fifty Kling AI alternatives and put Sora, Wan and Google Flow at the top.
Two substitutes map onto the gaps:
The platform itself offers a useful discipline: compare output using the same prompt, legal reference inputs, duration and aspect ratio, and record the model and settings with each result. It also warns against a common failure mode — do not treat gallery captions, speculative release posts or subscription plan names as proof of model access.
The headline limitation is the one the domain name obscures. Kling 4.0 generation is not available on this website. If a Kling 4.0 model is your requirement, nothing here satisfies it today.
The rights position needs equal care. You may use your output for lawful purposes permitted by the plan or product you selected — a conditional grant, not a blanket commercial licence, and the paid plans listing commercial rights are the ones not yet purchasable. The terms warn that AI output may not qualify for copyright protection in every jurisdiction, may resemble material generated for others and may contain errors or third-party material.
Availability is not fully in the operator's hands. The service relies on third-party AI generation and infrastructure providers, whose availability, safety rules, technical limits and model behavior may affect a request.
Content rules are strict. The terms prohibit pornography, nudity, sexually explicit or sexually exploitative content, plus deceptive deepfakes, impersonation, or unauthorized use of a real person's face, voice or likeness.
The data footprint is broad. It processes prompts, negative prompts and generation instructions; uploaded images, Frames, Elements, Feature Videos and other reference materials; model selections, duration, resolution, aspect ratio, audio choices and other generation settings, plus generated videos, previews, thumbnails and related metadata.
That material does not stay in one place. To complete a request, the platform may send your prompt, reference materials, selected settings and necessary task metadata to AI generation and infrastructure providers. Retention is bounded rather than open-ended: temporary private generation inputs are normally scheduled for deletion once no longer needed for an active or unresolved task, with a current standard retention window of generally up to 24 hours.
Default visibility is the reassuring part. The platform does not intentionally publish private prompts, uploads or generated results unless you choose to share them, and users can request access, correction, deletion or a portable copy of personal information.
Quality limits belong to the model, not this front end, but they shape expectations. An independent hands-on test of Kling 3.0 recorded that for a few frames the retriever has what looks like an extra leg, and the paws smear during fast motion. Plan a review pass rather than assuming a first generation is shippable.
No. The site states that Kling 4.0 generation is not available on this website and that it currently provides Kling 2.6 and Kling 3.0 Omni. The operator has also withdrawn earlier claims about verified Kling 4.0 features.
No. The operator describes itself as an independently operated online service with no affiliation to, sponsorship by or endorsement from Kuaishou Technology or the official Kling AI product.
Not for the basic path. The workspace advertises daily free credits with no account needed and no credit card for the daily browser trial. Feature Video uploads require Google sign-in.
The documented free launch configuration is 720P, 10 seconds, no audio and no watermark. 1080P and native audio are labelled as requiring credits, and 4K is hidden until the credit system is ready.
No. The pricing page publishes Free, Pro and Ultra tiers with monthly and annual options, but also states that paid subscriptions are not available yet and that clicking Subscribe Now will not charge you.
Only within the conditional grant in the terms: you may use your output for lawful purposes permitted by the plan or product you selected. Because the paid tiers listing commercial rights are not yet purchasable, check any commercial use against the current terms first.
On the Omni route, supported tasks use durations from 3 to 15 seconds, and the Kling 2.6 route produces five or ten second clips.
They are processed to complete the request and may be sent to AI generation and infrastructure providers. Temporary private generation inputs are normally scheduled for deletion once no longer needed.