Updated October 22, 2026. Official capabilities and access status checked; this is not a hands-on benchmark.
Kling 4.0 is Kuaishou’s multimodal AI video model for creating footage from text, images, and reference materials. It combines longer video generation with tools for directing key visual moments, reusing creative assets, and editing existing footage.
According to Kling’s official release record, the full model became available to everyone on October 15, 2026. The question has shifted from whether Kling 4.0 exists to which features you can actually use for your project—and through which interface.
When Was Kling 4.0 Released?
Kling 4.0 Flash entered limited early access on September 28, 2026. The full Kling 4.0 model followed on October 15. These are separate rollout milestones: the earlier Flash announcement should not be used as the full model’s release date.
Kling 4.0 vs Kling 3.0: What Has Changed?
Kling’s generation comparison identifies several practical changes:
| Capability |
Kling 3.0 series |
Kling 4.0 |
| Single-pass duration |
3–15 seconds |
3–30 seconds |
| Visual timing controls |
Start and end frames |
Up to 10 keyframe images |
| Combined reference capacity |
Smaller, mode-dependent limits |
Up to 15 combined assets |
| Audio output |
Mono |
Two-channel stereo |
| Video editing |
Available in Omni workflows |
Included in the multimodal workflow |
For a product advertisement, extra duration gives you room to introduce the object, show it in use, and finish on a closing composition. Keyframes let you specify visual milestones between the opening and ending. My recommendation is to choose the control your brief needs first, then increase duration; a longer failed take still has to be regenerated.
What About 4K, HDR, and Longer Videos?
Official pages describe high-resolution HDR output, but the current feature page still marks 1080p and 4K options as coming soon. The user guide also marks video extension as coming soon, despite broader descriptions elsewhere on the site. Check the live creation settings before committing to either feature.
A 30-second single generation and a longer sequence assembled through extension are different capabilities. Do not describe Kling 4.0 as generating a two-minute video in one pass.
Omni Reference or Keyframes: Which Should You Use?
The official user guide treats Omni Reference and Keyframes as separate entry points; they cannot be combined in one generation task. Choose Omni Reference to define assets and their roles. Choose Keyframes to specify what should appear at particular moments.
The 15-asset limit is shared, not 15 assets of every type. Individual limits include 10 images, five videos, seven elements, and three voice profiles. Video inputs also share a combined duration limit of 30 seconds.
Planning a 30-Second Cinematic Video
For an Omni Reference draft, assign each asset a clear job rather than uploading unrelated material. The following prompt is an original planning example, not a tested output:
@Image1 defines the unbranded ceramic coffee cup. Preserve its shape and color.
@Image2 defines the kitchen and its morning lighting.
0–8s: A person places the cup beside a window. Use a steady medium shot.
8–20s: Show the same person lifting the cup as steam rises. Move gently closer.
20–30s: Return the cup to the table and finish on a clean product composition.
Keep the same person, cup, and kitchen throughout. Use quiet room ambience.
No subtitles. No background music.
Review the result for hand contact, cup geometry, continuity, and unintended scene changes before extending the idea into a campaign.
Kling 4.0 vs Seedance 2.5: Which Should You Evaluate?
Thirty-second generation alone does not separate these models. ByteDance’s Seedance 2.5 announcement also describes 30-second clips, multi-round extension, timestamp-based editing, and references comprising up to 30 images, 10 videos, and 10 audio clips.
I would evaluate Kling first for a brief organized around specific keyframe images. I would include Seedance when the brief relies on a larger collection of audiovisual references. Those are workflow recommendations, not measured quality rankings.
Keep the existing café dialogue, rotating product, and targeted-edit tests. Run both models with comparable settings and record continuity, unwanted cuts, turnaround, retries, and cost per accepted clip. We have not completed that controlled comparison for this update.
For an integration baseline, see the Seedance 2.5 model page on GPT Proto. Its documented task determines which family-level features your application can use.
What Early Users Have Reported
In a Reddit discussion of early Kling 4.0 impressions, user Jack_P_1337 praised movement and multilingual voice acting but reported unwanted music and cuts during requests for a continuous shot. The post explicitly discusses Flash behavior, so it should not be treated as a benchmark of the full October release.
These observations suggest useful checks: does the result obey your audio instructions, keep the requested shot structure, and preserve the subject through movement? They do not establish a universal defect or a model ranking.
Kling 4.0 Pricing: What Should You Budget For?
Separate web membership costs from API usage. Kling’s developer pricing information describes duration-based billing whose calculation depends on video inputs and generation settings. A monthly subscription price cannot be treated as a fixed price per API video.
Before budgeting a batch, confirm the model variant, resolution, input-video duration, output duration, and billing unit. Then track total spending divided by the number of clips you accept for use. That includes reruns and revisions, not just the first attempt.
For currently supported GPT Proto models, use the pricing panel on the exact model page. This update does not quote a verified GPT Proto Kling 4.0 rate.
Is There a Kling 4.0 API?
Kling’s official developer documentation now announces early access to the Kling 4.0 API. Early access does not establish identical permissions, features, or limits for every account or third-party integration.
A working GPT Proto 4.0 endpoint has not been verified for this update. GPT Proto’s existing Flash status page still shows no active route. For a documented integration today, open the Kling 3 Omni 4K model page and use its API Usage example. That route calls Kling 3.0.
export GPTPROTO_API_KEY="YOUR_API_KEY"
curl --request POST \
'https://gptproto.com/api/v3/kling/kling-v3-omni-4k/text-to-video' \
--header "Authorization: Bearer $GPTPROTO_API_KEY" \
--header 'Content-Type: application/json' \
--data '{
"prompt": "One unbranded ceramic coffee cup on a wooden table. The camera slowly moves closer as morning light crosses the surface.",
"sound": false,
"aspect_ratio": "16:9",
"duration": 5
}'
Use your own API key and follow the model page’s Check Status instructions. This request has been checked against the published example; a paid generation has not been executed for this article.
Choose a supported video model, check its live price, and copy the API example from its model page into your AI coding assistant to help build the integration.
