What Is Kling 4.0?
Compare Kling 4.0 and Flash, check the latest release status, and learn how references, keyframes and editing fit your next AI video brief.
Guide updated Oct 9, 2026 · Sources checked Oct 9, 2026
In this guide
Kling 4.0, in context
Kling 4.0 is Kling AI’s announced multimodal video model for generation and editing. Kling 4.0 Flash began limited early access on September 28, 2026. The official October 2 update still describes the full model as closed beta, with a wider launch planned for October. Flash and the full model have different creative controls and output limits.
Build a scene around the subject, the action and the camera path. Use references for visual identity and keyframes for story beats when your chosen mode supports them. Explore the Kling 4.0 AI video generator to view each mode’s available controls and credit quote.
Keep references, keyframes and extension separate in your brief: what a scene contains, when it changes and how it continues. Kling 4.0 Flash suits a short scene developed from text, an image or Omni Reference; a timed sequence of keyframes needs the full model’s announced controls.
Kling 4.0 video capabilities and modes
Choose by the controls your scene needs. The full model adds timeline direction and integrated editing; Flash covers shorter scenes with text, image and Omni Reference inputs. Reference preparation is a workflow, while two-minute video extension is a separately announced upcoming capability.
Kling 4.0
Directed video and editing
Kling 4.0 Flash
Short video creation
Omni Reference
Reference preparation workflow
Video extension
Continue a longer story
| Mode or search name | Creative role | Announced details | Availability and evidence |
|---|---|---|---|
| Kling 4.0 | Directed video and editing | 3–30-second generation, up to 10 keyframe images, up to 15 combined reference assets and 720p, 1080p or 4K output. The published full-model specification also includes stereo audio and targeted editing. 10-bit HDR at 1080p and 4K is listed as coming soon in the September 30 guide. | Closed beta in the October 2 official update; wider launch planned for October 2026 |
| Kling 4.0 Flash | Short video creation | 3–20-second clips at 720p in 8-bit SDR, using text-to-video, image-to-video or Omni Reference. Flash does not support first and last frames or multiple keyframes. | Limited early access began September 28, 2026; check access in your Kling AI account |
| Omni Reference | Reference preparation workflow | Give each asset a job: images for identity and composition, video for movement and pacing, subjects for recurring characters or products. The full model’s combined limit is 15 assets, with separate limits for each input type. | An announced workflow in Kling 4.0; use the input limits shown for your selected model |
| Video extension | Continue a longer story | Repeated video extension toward a two-minute sequence is coming soon. It is separate from the full model’s 30-second native generation and Flash’s 20-second limit. | Coming soon; not a current 120-second single generation |
Kling 4.0 references, keyframes, and continuity
References establish the visual ingredients
Use images to define a face, product details or setting; use video to guide performance, camera movement or pacing. The full model lists up to 15 assets total, including up to 10 images, 5 videos totaling 30 seconds and 7 subjects, of which up to 3 can be video-based. These limits share the combined total.
Keyframes set the timing of a story
The full Kling 4.0 model announces up to 10 keyframes across a 3–30-second sequence. Start with an opening, one turning point and an ending; describe the motion between them. Flash has neither first/last-frame controls nor multiple keyframes.
Recreate a concept and revise selected details
For the full model’s announced Creative Recreation workflow, pair a reference clip’s pacing and camera direction with your own subjects and products. Targeted editing can change a background, expression or material while keeping the rest of the scene consistent. Review continuity after every change.
Choose sound, output and extension separately
The full model announces stereo audio and output up to 4K. The September 30 complete guide lists 1080p/4K 10-bit HDR as coming soon; the official release note also lists repeated extension toward two minutes as coming soon. Flash is specified at 720p in 8-bit SDR.
Planning keyframes for the full Kling 4.0 model
Subject · product · setting
Key moments
- 01Opening composition
- 02Main action
- 03Closing composition
A continuous scene
Creative briefs to explore with Kling 4.0
A product reveal with a stable identity
Plan a product reveal with one camera orbit and a clear selling point. Use product images for shape and materials, and a video reference for the reveal’s pace. For a revision in the full model’s announced editing workflow, change the background while reviewing the product’s identity.
A character across connected shots
Plan an arrival, a reaction and an exit with consistent character references. Kling AI’s October 2 Johnson Sheng article discusses commercial examples with recurring subjects and props; use it as a creator’s perspective, then review faces, clothing and lighting in your own sequence.
A destination with a clear atmosphere
Choose an opening view, one camera path and a closing composition. A reference clip can guide the rhythm of a travel concept. For a short Flash brief, describe the progression in the prompt; reserve timed keyframe planning for a mode that supports it.
Kling 4.0 vs Kling 3.0: compare the evidence
The September 30 official comparison describes changes in clip length, references, timeline control and editing. Both generations list 4K options, so resolution alone does not distinguish them. Use the same creative brief when comparing results, and check the available model and settings.
| Question | Kling 3.0 today | Kling 4.0 capabilities |
|---|---|---|
| Native duration | 3–15-second generation in the official comparison. | Full model: 3–30 seconds. Flash: 3–20 seconds. Extension toward two minutes is coming soon. |
| Keyframes and references | First and last frames are supported; reference combinations have smaller limits that depend on whether video is included. | Full model: up to 10 keyframes and 15 combined references. Flash: text, image and Omni Reference, without first/last frames or multiple keyframes. |
| Audiovisual output | The official comparison lists 720p, 1080p and 4K, 8-bit SDR and single-channel audio. | Full model adds stereo audio; 1080p/4K 10-bit HDR is listed as coming soon in the complete guide. Flash: 720p, 8-bit SDR. |
| Editing and access | Video editing is available through Kling 3.0 Omni workflows. | Full model integrates generation, references and targeted editing; the October 2 article describes closed beta. Flash is in a limited rollout. |
Kling 4.0 release, pricing, and API
Release and access
Flash began limited early access on September 28. The September 30 announcement named Ultra Yearly subscribers for that early access; current eligibility should be checked after signing in to Kling AI. The October 2 article still describes the full model as closed beta, with launch planned for October 2026.
Pricing and free access
The cited announcements do not establish a public per-second price or free allowance for Kling 4.0. Check Kling AI’s current terms. On this site, select Flash or Pro to review the available inputs, settings and credit estimate before creating.
API availability
The cited release materials do not provide a verified Kling 4.0 API model identifier or request specification. Check the current API documentation for your chosen integration before relying on 4.0 or Flash in production.
Common questions about Kling 4.0
No. Kling 4.0 is a model generation; 4K is an output resolution. Both Kling 3.0 and the full 4.0 specification list 4K options. Flash is specified at 720p in 8-bit SDR, while 1080p/4K 10-bit HDR is listed as coming soon in the September 30 full-model guide.
The full model announces 3–30-second generation, up to 10 keyframes, richer combined references, stereo audio and editing. Flash supports 3–20-second clips at 720p in 8-bit SDR with text, image and Omni Reference inputs. It does not support first/last frames or multiple keyframes.
The full model’s announced native range is 3–30 seconds, and Flash’s is 3–20 seconds. Repeated video extension toward a two-minute sequence is listed as coming soon. A two-minute sequence is not a current 120-second single generation.
Give each reference a role: an image for identity or composition, a video for motion or pacing, and a subject reference for recurring characters or products. Keep stable details consistent and separate camera direction from action. References describe scene ingredients; keyframes, where supported, place moments on the timeline.
Flash began limited early access on September 28, 2026. The September 30 announcement named Ultra Yearly subscribers, while the current feature page asks users to sign in to check access. Eligibility depends on the current rollout and your account.
No. The official Kling 4.0 feature FAQ explicitly excludes first/last frames and multiple keyframes from Flash. Flash supports text-to-video, image-to-video and Omni Reference; use a supported model for precise keyframe timing.
Turn your Kling 4.0 research into a brief
Take a Kling 4.0 scene idea to the AI video generator. Start with your selected mode, review the result, and refine your direction.