# Seedance 2.5 vs Kling 4.0

URL: https://dreambench.ai/compare/seedance-2-5-vs-kling-4-0

Pick Seedance 2.5 for a short story told in linked shots, for dialogue in Indonesian, Thai, Arabic or Vietnamese, a 480p try-out or a clip without sound. Pick Kling 4.0 for fast action and contact, for readable lettering, for German, French or Hindi dialogue, and for a photo of a real person, which Seedance refuses.

Written and reviewed by the DreamBench team. Published 2026-11-01; updated 2026-11-01.

## Seedance 2.5 and Kling 4.0 side by side

|  | Seedance 2.5 | Kling 4.0 |
|---|---|---|
| Made by | ByteDance Seed | Kling AI |
| Released | July 2026 | October 2026 |
| Longest clip | 30 seconds per generation | 30 seconds per generation |
| Video length on DreamBench | Up to 30 seconds on Starter, 2 minutes on Plus and 5 minutes on Ultra and Studio | Up to 30 seconds on Starter, 2 minutes on Plus and 5 minutes on Ultra and Studio |
| Resolution | 480p, 720p and 1080p | 720p and 1080p |
| Aspect ratios | 1:1, 16:9, 9:16, 4:3 and 21:9 | 1:1, 16:9, 9:16, 4:3 and 21:9 |
| Sound | On or off, your choice | Always on: every clip is generated with sound |
| Reference images | Up to 8 per video; the first 4 are included, then 43 credits each | Up to 8 per video; the first 4 are included, then 43 credits each |
| Plans | Every plan | Every plan |
| Credits | 31 per second at 480p, 57 per second at 720p and 127 per second at 1080p, plus 183 per video | 42 per second at 720p and 58 per second at 1080p, plus 183 per video |
| Worked example | A 15-second 480p video with sound uses 648 credits. | A 15-second 720p video with sound uses 813 credits. |
| DreamBench tools on it | Seedance 2.5 prompt generator and AI video prompt generator | AI video prompt generator |

Every row comes from the same tables as the [Seedance 2.5](https://dreambench.ai/models/seedance-2.5) and [Kling 4.0](https://dreambench.ai/models/kling-4.0) pages’ spec sheets, credits included. The two share the longest clip DreamBench makes in one generation, 30 seconds, and the same five aspect ratios in Film Studio.

Both run in two places. On the Video page your prompt goes to the model as you wrote it and comes back as one clip of 4 to 30 seconds; Seedance 2.5 takes a prompt of up to 6,500 characters there and Kling 4.0 up to 2,500, and Kling 4.0 has no 4:3 on the Video page. In Film Studio, DreamBench plans the scenes, builds the cast from your references and has the model make every scene.

**Where Seedance 2.5 and Kling 4.0 sit among DreamBench’s video models: sound, first and last frame, resolutions and aspect ratios, read from the composer’s own settings**

| Model | Sound | First and last frame | Resolutions | Aspect ratios |
|---|---|---|---|---|
| Seedance 2.5 | On or off | Yes | 480p, 720p, 1080p | 1:1 · 16:9 · 9:16 · 4:3 · 21:9 |
| Seedance 2.0 | On or off | Yes | 720p, 1080p, 4K | 1:1 · 16:9 · 9:16 · 4:3 · 21:9 |
| Veo 3.1 | Always on | Yes | 720p, 1080p, 4K | 16:9 · 9:16 |
| Kling 4.0 | Always on | Yes | 720p, 1080p | 1:1 · 16:9 · 9:16 · 4:3 · 21:9 |
| Kling 3.0 | On or off | Yes | 720p, 1080p | 1:1 · 16:9 · 9:16 · 4:3 · 21:9 |
| Wan 3.0 | Always on | Yes | 720p, 1080p | 1:1 · 16:9 · 9:16 · 4:3 |
| Wan 2.7 | On or off | Yes | 720p, 1080p | 1:1 · 16:9 · 9:16 · 4:3 |
| Grok Imagine 1.5 | Always on | First frame only | 720p, 1080p | 1:1 · 16:9 · 9:16 · 4:3 |
| MiniMax H3 | Always on | Yes | 720p, 1080p | 1:1 · 16:9 · 9:16 · 4:3 · 21:9 |
| HappyHorse 1.1 | Always on | First frame only | 720p, 1080p | 1:1 · 16:9 · 9:16 · 4:3 · 21:9 |
| LTX-2.3 | On or off | Yes | 720p, 1080p, 4K | 16:9 · 9:16 |
| Vidu Q2 | On or off | First frame only | 720p, 1080p | 1:1 · 16:9 · 9:16 · 4:3 |

## Seedance 2.5 or Kling 4.0 for your shot

**Which one should make this shot?**

- **A short story in one clip: set-up, turn, ending:** Seedance 2.5. ByteDance built it to organize several linked shots inside 30 seconds, from a set-up through a turning point to its resolution, with the main subject keeping its look across the cuts. Number the shots and give each its seconds.
- **A fight, a match, a stunt:** Kling 4.0, which Kling says keeps bodies and contact steady through fast action. ByteDance says Seedance 2.5’s complex motion can still look physically off, and that scenes where several subjects interact aren’t yet fully stable.
- **A label, a sign or a title that must read correctly:** Kling 4.0, which Kling says keeps lettering readable as the camera moves. ByteDance’s prompt guide lists misspelt text as a known Seedance 2.5 issue, such as an E drawn as an A.
- **Trying an idea before paying for the final:** Seedance 2.5 at 480p, its lowest-priced tier. When a take works, make it again at 720p or 1080p: that is a new take, so the idea carries over but the details can differ. Kling 4.0 starts at 720p.
- **A clip with no sound:** Seedance 2.5, whose sound you can switch off. A second costs the same either way, so there is no saving, but no audio to remove later. Kling 4.0 always makes sound.
- **A video that starts from a photo of a real person:** Kling 4.0. Seedance refuses reference images that show a real person’s face, and DreamBench then suggests switching model.

## Which model speaks your language

Language is where the two differ most for a reader outside the English-speaking world. ByteDance’s cloud, BytePlus, lists 11 languages for Seedance 2.5’s prompts and speech; Kling lists 9 for Kling 4.0’s dialogue, plus Chinese dialects and English accents. Six are on both lists.

**Dialogue languages each maker lists, read on November 1, 2026**

|  | Seedance 2.5 | Kling 4.0 |
|---|---|---|
| English, Chinese, Japanese, Korean, Spanish | Yes | Yes |
| Portuguese | Yes | Yes |
| Indonesian, Malay, Thai, Vietnamese, Arabic | Yes | Not listed |
| German, French, Hindi | Not listed | Yes |
| Dialects and accents | Not listed | Sichuanese, Cantonese and other Chinese dialects; American, British and Indian English |

On either model, write the line in the language it should be spoken in, inside quotation marks, and give it to a named speaker. Keep each line short enough to say in its time, at about 2 words a second.

## What ByteDance and Kling offer in their own apps

**Each maker’s own specification, read on November 1, 2026**

|  | Seedance 2.5 | Kling 4.0 |
|---|---|---|
| One generation | 4 to 30 seconds, or let the model choose | 3 to 30 seconds |
| References in one generation | Up to 50: 30 images, 10 videos and 10 audio clips | Up to 15: images, videos, voices and elements |
| Frames you set | A first frame, or a first and a last frame | Up to 10 keyframes, first, last or in between |
| Beyond a new clip | Editing at a given second, extension, a .mov export | Editing and creative recreation; extension coming soon |
| Sound | Generated with the picture, on or off | Two-channel stereo on every clip |
| Limits the maker states | Complex motion and scenes where several subjects interact | None stated on the pages read |

DreamBench uses each model’s core: your prompt on the Video page, and in Film Studio your reference images, turned into character, prop and place sheets. Video and audio references, keyframes, editing and extension are features of ByteDance’s and Kling’s own apps and APIs.

## Real people, references and Seedance’s face rule

Seedance won’t accept a reference image that shows a real person’s face. On DreamBench that means a Seedance 2.5 video can’t start from a photo of you, a colleague or a customer: describe the person instead, or let DreamBench design the character from your words. If Seedance flags a character DreamBench designed, DreamBench registers it with ByteDance’s asset library and tries again.

ByteDance’s rule doesn’t apply to Kling 4.0, so a video built on a photo of a real person belongs there, or on another model. Either way, up to 8 reference images go into a Film Studio video, each tagged as a character, creature, location or prop, and named in your prompt with @ and its label. You need the rights to every photo you upload.

> ByteDance’s prompt guide notes that Seedance 2.5 can map a reference to the wrong character when there are several. It suggests adding references in the order the subjects first appear.

## Where each falls short

- Seedance 2.5: no real faces in references; complex motion and crowded interactions are its maker’s own stated weak points; lettering can come out misspelt; music can appear even when the prompt says no background music.
- Kling 4.0: no silent mode and no 480p, so every try-out is a 720p or 1080p clip with sound; no 4:3 on the Video page; a shorter prompt on the Video page; no Indonesian, Thai, Arabic or Vietnamese dialogue.
- Both: 1080p at most on DreamBench, and their makers’ extras, such as keyframes, editing and extension, aren’t on DreamBench yet.

A Film Studio video uses one model for every scene. To compare them on your own idea, make it once on each and keep the one you prefer. For each model against an older one, see Seedance 2.5 vs Kling 3.0 and [Kling 4.0 vs Kling 3.0](https://dreambench.ai/compare/kling-4-0-vs-kling-3-0).

## How to prompt each for a 30-second take

Both makers want a 30-second prompt cut into timed parts, but they order it differently. ByteDance’s guide for Seedance 2.5 starts with a one-line summary of the video, then shots or whole-second timestamps, each with its visuals, camera, action, dialogue and sound, then what stays the same throughout. Kling’s guide for 4.0 starts with the overall settings, then a timed sequence of events, then the audio.

- Seedance 2.5: write “0–5s: …”, “5–10s: …” with no gaps in the timeline. Too little in a range lets the model improvise; too much gives extra cuts or drops part of the plot.
- Seedance 2.5: end with what must stay constant, such as the camera height, the setting, the light and the sound.
- Kling 4.0: write “From 0 to 10 seconds: …” and give a long take three or four beats; ask for “one continuous take” if you want no cuts.
- Both: describe what you want rather than what you don’t. Each maker names the same two exceptions, no subtitles and no background music.

The [Seedance 2.5 prompt guide](https://dreambench.ai/guides/seedance-2-5-prompt-guide) works through ByteDance’s structure with examples to copy. In Film Studio, DreamBench writes each scene’s prompt in the grammar of the model you pick.

## Questions

- **Is Seedance 2.5 better than Kling 4.0?** It depends on the shot. Seedance 2.5 tells a short story in linked shots inside one clip, speaks 11 listed languages including Indonesian and Arabic, and offers 480p and sound off. Kling 4.0 is built for fast action and readable lettering, speaks German, French and Hindi, and has no rule against photos of real people. Both make 30-second clips.
- **What is the difference between Seedance 2.5 and Kling 4.0?** Both make up to 30 seconds in one generation, on DreamBench’s Video page and in Film Studio. Seedance 2.5 renders 480p as well as 720p and 1080p and lets you switch sound off; Kling 4.0 renders 720p and 1080p with stereo sound always on. Their dialogue languages differ, and Seedance refuses real faces in references.
- **Which speaks Indonesian, Seedance 2.5 or Kling 4.0?** Seedance 2.5. BytePlus lists Indonesian among its 11 languages, with Malay, Thai, Vietnamese and Arabic. Kling 4.0’s list of 9 languages doesn’t include Indonesian, so for Indonesian dialogue choose Seedance 2.5.
- **Which speaks German, Seedance 2.5 or Kling 4.0?** Kling 4.0. Kling lists German, French and Hindi among its 9 dialogue languages; BytePlus’s list for Seedance 2.5 includes none of them. Both list English, Chinese, Japanese, Korean, Spanish and Portuguese.
- **Can I use a photo of myself with Seedance 2.5 or Kling 4.0?** Not with Seedance 2.5, which refuses reference images that show a real person’s face. Kling 4.0 has no such rule on DreamBench: add the photo to a Film Studio video, tag it as a character and name it in your prompt with @. You need the rights to any photo you upload.
- **Which costs fewer credits, Seedance 2.5 or Kling 4.0?** It depends on the resolution. The table on this page lists both models’ credits per second at each resolution, from the rates the composer quotes. Seedance 2.5’s 480p is the lowest-priced way to try an idea on either, and the composer shows a video’s exact cost before you generate.
- **Can Seedance 2.5 and Kling 4.0 cut between shots in one clip?** Yes, both. Seedance 2.5 cuts between the shots you number and time inside one clip, keeping the main subject’s look. Kling 4.0 may plan its own shots inside a long take; ask for one continuous take if you want none. In Film Studio, DreamBench also cuts a video into separate scenes you can redo.
- **Which is better for TikTok and Reels, Seedance 2.5 or Kling 4.0?** Both render 9:16 for TikTok, Reels and Shorts, in clips of up to 30 seconds. Seedance 2.5 adds a 480p try-out and sound off; Kling 4.0 suits fast action, on-screen text and dialogue in German, French or Hindi. For Indonesian or Thai voices, Seedance 2.5 is the one that lists them.

## Sources

- [Seedance 2.5 on ByteDance Seed](https://seed.bytedance.com/en/seedance2_5), ByteDance Seed: read 2026-11-01
- [ByteDance’s Seedance 2.5 launch post](https://seed.bytedance.com/en/blog/one-take-creation-flexible-referencing-introducing-seedance-2-5), ByteDance Seed: read 2026-11-01
- [Seedance 2.5 tutorial (BytePlus ModelArk)](https://docs.byteplus.com/en/docs/ModelArk/2607688), BytePlus: read 2026-11-01
- [Seedance 2.5 prompt guide (BytePlus ModelArk)](https://docs.byteplus.com/en/docs/ModelArk/2607689), BytePlus: read 2026-11-01
- [Kling’s Kling 4.0 user guide](https://kling.ai/quickstart/kling-4-model-user-guide), Kling AI: read 2026-11-01
- [Kling 4.0 on Kling AI](https://kling.ai/feature/kling-4-ai-video-generation), Kling AI: read 2026-11-01
- [Seedance 2.5 on ByteDance Seed](https://seed.bytedance.com/en/seedance2_5), ByteDance Seed: read 2026-10-31
- [ByteDance’s Seedance 2.5 launch post](https://seed.bytedance.com/en/blog/one-take-creation-flexible-referencing-introducing-seedance-2-5), ByteDance Seed: read 2026-10-31
- [Seedance 2.5 tutorial (BytePlus ModelArk)](https://docs.byteplus.com/en/docs/ModelArk/2607688), ByteDance Seed: read 2026-10-31
- [Seedance 2.5 prompt guide (BytePlus ModelArk)](https://docs.byteplus.com/en/docs/ModelArk/2607689), ByteDance Seed: read 2026-10-31
- [Portrait videos with Seedance (BytePlus ModelArk)](https://docs.byteplus.com/en/docs/ModelArk/seedance-portrait-asset-guide), ByteDance Seed: read 2026-10-31
- [Kling 4.0 on Kling AI](https://kling.ai/feature/kling-4-ai-video-generation), Kling AI: read 2026-10-31
- [Kling’s Kling 4.0 user guide](https://kling.ai/quickstart/kling-4-model-user-guide), Kling AI: read 2026-10-31
- [Kling’s API user manual for Kling 4.0](https://kling.ai/document-api/api/usage-guide/kling-4-0), Kling AI: read 2026-10-31
- [Kling’s API changelog](https://kling.ai/document-api/updates/api), Kling AI: read 2026-10-31

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