How to Use Kling 4.0 Today: Flash Access, Prompts and Keyframes
Kling 4.0 exists today only as Kling 4.0 Flash, an early-access tier inside Kling's own app; the full model and its API are targeted for October. Our release guide covers what was announced; this one covers how to actually work with it: getting access, what Flash does and does not accept, what it costs, and how to prepare prompts and keyframes that will survive the upgrade. Last checked: 2026-10-10.
Using Flash today
Flash opened for early access on September 28, 2026 to what Kling's release note calls "a limited group of users" — third-party coverage places that group among Ultra yearly subscribers. Inside Kling's app, Flash lists three modes: text-to-video, image-to-video with a first frame, and Omni Reference for identity-guided generation. Output is 3 to 20 seconds at 720p in 8-bit SDR, and multi-keyframe input is not part of the early access. Treat it as a drafting tier: fast to iterate on, honest about composition and motion, and not the final resolution.
What Flash costs
Two answers. Access rides on the subscription: Kling's membership page lists the Ultra tier at $127.99 for the first month and $159.99 a month after that, including 26,000 credits a month (about $0.49 per 100 credits) — and Flash is where that tier's early access lands first. Per generation, though, Kling has not published a credit price for 4.0 Flash on any public rate card; the number that matters is the one the app quotes when you press generate. There is no Kling 4.0 API yet, so there is no API pricing either.
What changes when the full model ships (announced)
| Capability | Announced for the full model |
|---|---|
| Clip length | 3 to 30 seconds |
| Resolution | 720p, 1080p, 4K; 10-bit HDR at 1080p and 4K "coming soon" |
| Keyframes | Up to 10 keyframe images as input |
| References | Up to 15 assets: 10 images, 5 videos (30 s total), 7 subjects — including a specified voice |
| Prompts | Up to 8,000 tokens, expanded and refined by the model |
| Audio | Two-channel stereo with improved lip sync |
| Editing | Up to 5 input clips (combined 30 s); extension up to 2 minutes "coming soon" |
These figures come from Kling's own 4.0 release note and are repeated by third-party coverage. Until the full model ships, nobody outside Kling can verify them, so read every row as announced, not confirmed.
Prompt and keyframe workflow
- Write beats, not camera poetry. The 8,000-token budget is room for a shot list: one beat per line, each with its action, camera and sound. The model expands and refines what you write — vague input gives it more to invent, not less.
- Plan keyframes as story moments. The full model accepts up to 10 keyframes: use them for character states, scene changes and story beats, not for ten variations of the same frame.
- Anchor identity with references. Subjects defined by images or video — including a voice assigned to a subject — are how a character stays the same across a 30-second take. Flash's Omni Reference previews this workflow today.
- Draft inside Flash's ceiling. Flash caps at 20 seconds and 720p. Structure a 30-second piece as keyframe-linked beats so each beat drafts inside Flash and the full model can later render the whole take.
- Keep the audio in the prompt. Kling 4.0 generates two-channel stereo with lip sync; write the dialogue and ambience into the prompt rather than planning to dub it later.
What to use on Imgo today
Kling 4.0 is not integrated into Imgo and has no Imgo credit price — this page is an external reference. What is live is the Seedance 2 family: clips of 5 to 15 seconds, 480p up to 4K on Seedance 2.0 (480p and 720p on the Fast and Mini tiers), up to 4 reference images, 3 reference videos and 3 audio tracks, and native audio with the picture. The generator quotes the exact credit price before you submit, and Seedance 2 Fast costs about 55% of Seedance 2.0's per-second rate for drafts. The live model list shows everything you can generate right now.
How it compares
For a side-by-side of Kling 4.0's announced specs against the other model in its class — including which of the two you can actually generate with today — see Kling 4.0 vs Seedance 2.5, and our Kling 4.0 alternatives page for the wider field.
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