Seedance vs Kling is the comparison most people make before picking an AI video model in 2026. Seedance comes from ByteDance's Seed team; Kling comes from Kuaishou. Both make clips with sound from text, images and video references, and both now reach 30 seconds per generation. They differ in how you steer them: Seedance leans on references and timed prompts, Kling 4.0 adds up to 10 keyframes. This comparison uses only each company's own pages, linked at the end and checked on November 2, 2026. We don't publish benchmark scores; neither company's pages give a shared test that would make them comparable.
A note on where we stand: this site runs Seedance and doesn't offer Kling. We've tried to keep the comparison fair, and the "which to pick" section includes cases where Kling is the better choice.
The current Seedance and Kling models
Seedance (ByteDance Seed)
- Seedance 2.0, launched February 12, 2026: text, image, audio and video input, multi-shot clips up to 15 seconds, dual-channel audio.
- Seedance 2.0 Fast: a lighter version, 480p and 720p on ByteDance's API.
- Seedance 2.5, launched July 31, 2026, "built for 30-second storytelling": up to 30 seconds per pass, many more references, timestamp editing.
Kling (Kuaishou)
- Kling 4.0, available to everyone since October 15, 2026: 3–30 seconds, up to 10 keyframes, stereo sound, Omni Reference.
- Kling 4.0 Flash: faster, 3–20 seconds at 720p, 8-bit SDR.
- Kling 3.0 series (3.0, 3.0 Turbo, 3.0 Omni): still listed on Kling's API pricing; 3–15 seconds, single-channel audio.
Seedance vs Kling at a glance
| Seedance 2.0 | Seedance 2.5 | Kling 4.0 | |
|---|---|---|---|
| Released | Feb 12, 2026 | Jul 31, 2026 | Oct 15, 2026 (general availability) |
| Length per generation | 4–15 s | 4–30 s | 3–30 s |
| Going longer | Extension | Multi-round extension | Extension up to 2 min, listed as coming soon |
| References | 9 images, 3 videos, 3 audio | 30 images, 10 videos, 10 audio | Up to 15 items: 10 images, 5 videos (30 s), voice |
| Frame control | First / last frame | First / last frame, timestamps | First / last frame, up to 10 keyframes |
| Audio | Dual-channel stereo | Joint audio-video generation | Two-channel stereo |
| Resolution (official) | 480p–1080p, 4K on BytePlus API | 480p–1080p (1080p 10-bit), no 4K | 720p, 1080p, 4K; 10-bit HDR coming soon |
| Aspect ratios | 21:9, 16:9, 4:3, 1:1, 3:4, 9:16 | 21:9, 16:9, 4:3, 1:1, 3:4, 9:16 | 21:9, 16:9, 1:1, 9:16, Auto |
| Editing | Edit clips, characters, actions | Timestamp edits, green screen, camera perspective | Targeted edits of up to 5 input clips |
Resolution and ratios for Seedance are from ByteDance's BytePlus ModelArk API docs; Kling's are from its 4.0 release notes.
Length and multi-shot storytelling
At 15 seconds, Seedance 2.0 sits level with Kling 3.0 (3–15 s). At 30 seconds, Seedance 2.5 and Kling 4.0 match each other. Both use the extra time for several connected shots rather than one long, slow move, and both handle a single continuous take when asked.
The difference is past 30 seconds. ByteDance says Seedance 2.5 supports multiple rounds of extension that append shots to an existing clip. Kling lists extension up to 2 minutes for Kling 4.0 as coming soon. For long sequences today, Seedance 2.5 has the edge; that may change when Kling's extension ships.
References vs keyframes: how you steer each model
This is the biggest practical difference in the Seedance vs Kling decision.
Seedance is reference-first. Seedance 2.0 takes up to 9 images, 3 video clips and 3 audio clips in one request; Seedance 2.5 raises that to 30 images, 10 clips and 10 audio clips. You tell the model what each file is for ("the jacket from Image 2", "the camera move from Video 1") and control timing with timestamps in the prompt ("0–5 s: …, 5–10 s: …"). Audio references can carry music or a voice.
Kling 4.0 is keyframe-first. It takes fewer references, up to 15 items across 10 images, 5 videos (30 seconds combined) and up to 7 saved elements, and audio references are voice only. In return it accepts up to 10 keyframe images placed along the timeline, so you pin down what's on screen at given moments instead of describing them. Kling also accepts prompts up to 8,000 tokens and supports white-model and depth-map videos as motion references.
If your material is a pile of product shots, a dance clip and a track, Seedance's reference model fits. If you have a storyboard of exact frames, Kling's keyframes fit.
Sound and dialogue
Both generate sound with the picture. ByteDance describes Seedance 2.0's audio as dual-channel stereo; Kling 4.0 also outputs two-channel stereo, while Kling 3.0 is single-channel. Kling publishes a long list of speech languages for 4.0 (Chinese, English, Japanese, Korean, Spanish, Portuguese, German, French, Hindi and more) plus accents such as Cantonese, Sichuanese and British or Indian English, and claims better lip-sync. We didn't find an equivalent language list on ByteDance's Seedance 2.0 pages, so we won't compare languages here.
Resolution and formats
On ByteDance's API, Seedance 2.0 renders 480p, 720p, 1080p and 4K, Seedance 2.0 Fast 480p and 720p, and Seedance 2.5 480p to 1080p (1080p in 10-bit) without 4K. Kling 4.0 renders 720p, 1080p and 4K, with 10-bit HDR at 1080p and 4K listed as coming soon; Kling 4.0 Flash is 720p only.
For formats, Seedance offers 4:3 and 3:4 in addition to 21:9, 16:9, 1:1 and 9:16. Kling 4.0 lists 21:9, 16:9, 1:1, 9:16 and Auto.
On this site Seedance renders up to 1080P (Seedance 2.0 Fast up to 720P); we don't offer 4K.
Editing existing video
Both companies put editing into the main model. Seedance 2.0 supports targeted changes to clips, characters, actions and storylines; Seedance 2.5 adds timestamp-level edits, green-screen and camera-perspective editing. Kling 4.0 edits up to 5 input clips (each 3–30 seconds, 30 seconds combined), changing expressions, movement, camera, style or background while keeping the rest. Neither is offered on this site, where a reference video guides a new clip rather than being edited.
Price and access
- Kling is available in the Kling AI app and via API. On Kling's API pricing page, Kling 4.0 costs 1.0 unit per second at 720P and 1.5 at 1080P without input video; Kling 3.0 with native audio is 0.9 and 1.2.
- Seedance is available in Dreamina (CapCut) and via the BytePlus ModelArk API, which bills by tokens.
- On this site you pay per second for Seedance 2.0 Fast, 2.0 and 2.5 with one-time credit packs, see the price before you render, and get credits back if a render fails. New accounts get free credits for one 5-second video. See pricing.
Units, tokens and credits aren't directly comparable, so check each page for current rates rather than relying on a ratio someone quoted.
Which to pick: Seedance or Kling?
Pick Seedance 2.0 or 2.5 if:
- you work from lots of references: several product shots, a motion clip, a music track or a voice;
- you need 4:3 or 3:4, or cheap 480p drafts;
- you want to go past 30 seconds today with extension (2.5);
- you'd rather write timed beats than prepare keyframe images.
Pick Kling 4.0 if:
- you have a storyboard and want up to 10 keyframes to lock the timing;
- you need 4K from the newest model, or HDR once it ships;
- you need speech in one of Kling's listed languages or accents;
- you want very long, detailed prompts (up to 8,000 tokens).
For short social clips from a prompt or one photo, both are strong. Run the same prompt in each before committing a budget. To try Seedance here, start with text-to-video, image-to-video or reference-to-video, or go straight to the generator. For 30-second clips, see Seedance 2.5.
Sources
- Seedance 2.0 launch, ByteDance Seed: seed.bytedance.com/blog/seedance-2-0-official-launch
- Seedance 2.5 launch, ByteDance Seed: seed.bytedance.com/en/blog/one-take-creation-flexible-referencing-introducing-seedance-2-5
- Video generation specs, BytePlus ModelArk: docs.byteplus.com/en/docs/modelark/video-generation-tutorial
- Kling 4.0 release notes: kling.ai/release-note/release-notes/Kling_4
- Kling 4.0 vs 3.0, Kling blog: kling.ai/blog/kling-4-vs-3
- Kling API pricing: kling.ai/dev/pricing
FAQ
Is Seedance better than Kling?
Neither is better at everything. Seedance takes far more references and offers 4:3 and 3:4; Kling 4.0 adds up to 10 keyframes and lists more speech languages. Pick by how you work, and test the same prompt in both.
Which is longer, Seedance or Kling?
Seedance 2.5 and Kling 4.0 both reach 30 seconds per generation. Seedance 2.0 and Kling 3.0 stop at 15. Seedance 2.5 supports extension today; Kling lists extension to 2 minutes as coming soon.
Do both make sound?
Yes. Both generate audio with the picture. Seedance 2.0 and Kling 4.0 are described as two-channel stereo; Kling 3.0 is single-channel.
Can I use Kling on this site?
No. This site runs Seedance 2.0 Fast, Seedance 2.0 and Seedance 2.5 only. For prompting tips, see our Seedance 2.0 prompt guide.
Seedance is a trademark of ByteDance and Kling is a trademark of Kuaishou Technology. This site is an independent service and is not affiliated with or endorsed by either company.
Read more
Seedance 2.0 Prompts: A Practical Prompt Guide
Seedance 2.0 prompts that work: a simple prompt structure, timed beats for multi-shot clips, Image 1 and Video 1 references, and 12 copy-ready examples.
How to Use Seedance 2.0: A Step-by-Step Tutorial
How to use Seedance 2.0 step by step: Text, Image and Reference modes, picking model, resolution and length, seeing the price first, and free credits to start.