# Seedance 2.5 Seedance 2.5 is ByteDance's video model for longer stories, released by ByteDance Seed on 31 July 2026. It makes one clip of up to 30 seconds with sound, guided by many reference images, videos and audio clips, and follows timed beats in the prompt. In Sloosh it runs 4 to 30 seconds at up to 1080p. Web page: https://sloosh.ai/models/seedance-2.5 [Use Seedance 2.5](https://sloosh.ai/studio/video?video-model=seedance-2.5) [View templates](https://sloosh.ai/models/seedance-2.5/templates.md) ## Key facts in Sloosh | | | | --- | --- | | Made by | ByteDance (ByteDance Seed) | | Makes | video (with sound: optional, on by default) | | Inputs | text; start frame (optional); end frame (optional); up to 30 reference images; up to 10 reference videos (each 2 to 30 seconds, 30 seconds in total); up to 10 reference audio clips (wav or mp3, each 2 to 30 seconds, 30 seconds in total, up to 15 MB each). Frames and reference images can't be used in the same run. | | Length | any whole number of seconds from 4 to 30 | | Resolution | 480p, 720p, 1080p | | Aspect ratios | Auto, 21:9, 16:9, 4:3, 1:1, 3:4, 9:16 | | Prompt limit | 30,000 characters | ## Best for - Longer ads and short stories in one take: ByteDance says Seedance 2.5 makes "a 30-second audio-video clip" in a single pass, up from 15 seconds ([ByteDance Seed blog](https://seed.bytedance.com/en/blog/one-take-creation-flexible-referencing-introducing-seedance-2-5)). - Keeping a product or character consistent across shots from many references: ByteDance lists "up to 30 images, 10 video clips, and 10 audio clips" per run ([ByteDance Seed blog](https://seed.bytedance.com/en/blog/one-take-creation-flexible-referencing-introducing-seedance-2-5)). - Clips paced beat by beat: ByteDance says you can control "the narrative, camera perspective, movement, and overall rhythm for a specific time frame" ([ByteDance Seed blog](https://seed.bytedance.com/en/blog/one-take-creation-flexible-referencing-introducing-seedance-2-5)). - Following a reference video's framing and camera language: the project page says it understands reference videos "more precisely" ([Seedance 2.5 page](https://seed.bytedance.com/en/seedance2_5)). ## How to use Seedance 2.5 in Sloosh 1. Open [Video](https://sloosh.ai/studio/video?video-model=seedance-2.5) and pick Seedance 2.5 in the model chip. 2. Add references (images, videos, audio) to keep a product, character or sound, or add a start and end frame instead. Studio closes the other option once you add one. 3. Write the prompt: name each reference by its number ("Image 1", "Video 1"), then the plot in timed beats. 4. Set the length (4 to 30 seconds), resolution and aspect ratio. Switch sound off with the speaker switch if you don't need it. 5. Check the price on the Generate button, then generate. ## Seedance 2.5 prompting tips - Start by naming each reference by order and job, for example "Image 1 is the amber serum bottle; keep its label exactly" ([Sloosh docs](https://sloosh.ai/docs/seedance-2-5.md)). - Write the plot as timed beats in whole seconds with no gaps, such as `0-3s:` and `3-7s:`, each with its visuals, camera, action and sound. ByteDance's own example prompts use time segments like "0-5s" ([Sloosh docs](https://sloosh.ai/docs/seedance-2-5.md), [ByteDance Seed blog](https://seed.bytedance.com/en/blog/one-take-creation-flexible-referencing-introducing-seedance-2-5)). - Put sound effects in angle brackets, ``, and dialogue in quotes ([Sloosh docs](https://sloosh.ai/docs/seedance-2-5.md)). - Plain negatives work for subtitles and audio: "No subtitles.", "No music." ([Sloosh docs](https://sloosh.ai/docs/seedance-2-5.md)). - Don't change the camera every second or pack many actions into one beat; that causes extra cuts or skipped plot ([Sloosh docs](https://sloosh.ai/docs/seedance-2-5.md)). - For on-screen words, spell them letter by letter or add the text as an image reference ([Sloosh docs](https://sloosh.ai/docs/seedance-2-5.md)). ## Seedance 2.5 example prompts **Prompt 1** ```text Image 1 is the trail running shoe; keep its orange upper and black sole exactly. A 20-second ad on a misty mountain path at dawn. 0-5s: Wide shot, a runner crests the ridge in soft blue light. 5-12s: Low tracking shot beside the shoes as they hit wet rock. 12-20s: The runner stops; slow push-in to a close-up of the shoe on the rock. Wind and distant birds. No subtitles, no logo. ``` **Prompt 2** ```text Image 1 is the chef, Image 2 is the kitchen. 0-4s: The chef sets a pan on the stove in the kitchen from Image 2. 4-9s: Close-up of garlic hitting hot oil. 9-14s: The chef looks at the camera and says "Ten minutes, that's all." Warm light, handheld feel. No music. ``` **Prompt 3** ```text Video 1 is the camera move to copy. Image 1 is the perfume bottle; keep its glass shape and gold cap. 0-6s: Follow the camera path of Video 1 around the bottle on black velvet. 6-12s: Slow orbit ends on the cap catching a single light. Soft string music. No subtitles. ``` ## How it compares in Sloosh | | Seedance 2.5 | Seedance 2.0 | Seedance 2.0 Fast | Wan 3 | | --- | --- | --- | --- | --- | | Length | 4 to 30 s | 4, 6, 8, 10, 12, 15 s | 4 to 15 s | 5, 10, 15, 30 s | | Max resolution | 1080p | 4K | 720p | 1080p | | Reference images / videos / audio | 30 / 10 / 10 | 9 / 3 / 3 | 9 / 3 / 3 | 10 / 5 / 5 | | Sound | optional | optional | optional | optional | | Seed | no | no | no | yes | Seedance 2.0 follows numbered shots rather than timestamps, and the same prompt gives a visibly different style on 2.5 ([Sloosh docs](https://sloosh.ai/docs/seedance-2-5.md)). ## Where else it runs At launch ByteDance listed Jimeng AI and Doubao Pro, with API access planned ([ByteDance Seed blog, 31 Jul 2026](https://seed.bytedance.com/en/blog/one-take-creation-flexible-referencing-introducing-seedance-2-5)). ## Frequently asked questions ### How long can a Seedance 2.5 video be in Sloosh? Any whole number of seconds from 4 to 30. Kling 4.0 and Wan 3 also reach 30 seconds in Sloosh, but only in 5, 10, 15 or 30 second steps. ### When was Seedance 2.5 released? ByteDance Seed announced it on 31 July 2026. ### Seedance 2.5 vs Seedance 2.0: which should I use? Use 2.5 for clips over 15 seconds, timed beats and many references. Use Seedance 2.0 for 4K output or a look you already like. ### How many references does Seedance 2.5 take in Sloosh? Up to 30 images, 10 videos and 10 audio clips. Frames and reference images can't be combined in one run. ### Can I turn off sound? Yes. Sound is on by default and the speaker switch turns it off; the price on the Generate button can change. ### How do I add dialogue and sound effects? Dialogue in quotes, sound effects in angle brackets, and plain negatives like "No music." to control the soundtrack. ### Is Seedance 2.5 free? Not for free: Sloosh has no free plan, so each Seedance 2.5 clip is paid from your plan. Any current offer shows on [pricing](https://sloosh.ai/pricing), and Studio shows the exact price before you generate. Your first Sloosh workspace gets 20 starter credits once, so you can try it before you pay. ### Is there a Seedance 2.5 API? ByteDance said at launch that API access was planned ([ByteDance Seed blog](https://seed.bytedance.com/en/blog/one-take-creation-flexible-referencing-introducing-seedance-2-5)). In Sloosh you use Seedance 2.5 in Studio with no API key. ## Related - Models: [Seedance 2.0](https://sloosh.ai/models/seedance-2.0), [Seedance 2.0 Fast](https://sloosh.ai/models/seedance-2.0-fast), [Wan 3](https://sloosh.ai/models/wan-3.0), [MiniMax H3 Reference](https://sloosh.ai/models/minimax-h3-reference) - Docs: [Seedance 2.5](https://sloosh.ai/docs/seedance-2-5.md) ## Sources - [ByteDance Seed: Introducing Seedance 2.5](https://seed.bytedance.com/en/blog/one-take-creation-flexible-referencing-introducing-seedance-2-5) - [ByteDance Seed: Seedance 2.5 project page](https://seed.bytedance.com/en/seedance2_5) - [Sloosh docs: Seedance 2.5](https://sloosh.ai/docs/seedance-2-5)