Alibaba Cloud has Wan, Kuaishou has Kling — and ByteDance has Seedance. Developed by ByteDance's Seed research team, Seedance is the company's flagship AI video generation model family and a major force in China's AI video market. It is built on a unified multimodal audio-video joint generation architecture, generating video from text, images, video, and audio inputs.
Seedance's core positioning: produce physically plausible, narratively coherent, audio-synced HD video from multimodal inputs. Unlike tools that output silent visuals, Seedance jointly models audio and video from the ground up — dialogue, sound effects, and background music are generated in sync with the picture as a single modeling problem.
By 2026, China's AI video market had settled into a "three kingdoms" contest among ByteDance's Seedance, Kuaishou's Kling, and Alibaba. Seedance's commercial performance is striking: industry data suggests Seedance contributed more than half of Volcano Engine's MaaS revenue in 2026, with significant single-month revenue. It is a clear signal that AI video generation has moved from exploration into monetization.
Generate video with the Seedance series on FuseAITools: Seedance Hub.
II. Core Model Evolution
The Seedance series has iterated from early exploration to a production-ready all-round model family. Every version has a clear positioning and a concrete breakthrough.
1. Foundation Phase: From 1.0 to 1.5 Pro
Seedance 1.0 (June 2025) laid the foundation for fluid motion generation, multi-shot narrative, diverse style expression, and accurate prompt following at 1080p resolution.
Seedance 1.5 Pro (December 2025) introduced the audio-video joint generation architecture, with audio-visual sync, multilingual and dialect support, and enhanced camera control.
Try the audio-capable all-round Pro line on FuseAITools: Seedance 1.5 Pro.
2. The Four-Modality Era: Seedance 2.0
Seedance 2.0 (officially released February 12, 2026) was an architectural leap:
- Input modalities expanded from 2 to 4 (text, image, video, audio).
- Introduced the @reference system for fine-grained creative control.
- Output upgraded to native 2K resolution.
- Generation speed improved by roughly 30% over 1.5 Pro.
Generate with the four-modality flagship on FuseAITools: Seedance 2.0.
3. The Long-Form Era: Seedance 2.5
Seedance 2.5 (officially released July 31, 2026) marked the shift from "generating clips" to "completing a creation":
- Single-pass duration raised from 15 seconds to 30 seconds.
- All-modality reference capacity raised from 12 to 50 assets.
- Multi-turn extension, producing minutes of coherent content.
- Strengthened timestamp control, green-screen editing, and perspective editing.
4. The Lightweight Tier: Seedance 2.0 Mini
Seedance 2.0 Mini is the family's lightweight, low-cost tier for high-frequency, batch video creation. Mini outputs 4-15 seconds at 480p or 720p, with an option for synced sound. When a high-quality final hero asset is needed, creators switch to the standard version. On FuseAITools, the fast flagship tier plays the same role for rapid iteration: Seedance 2.0 Fast.
5. Version Comparison at a Glance
| Version | Core Features | Best For |
|---|---|---|
| Seedance 2.0 Mini | 4-15s; 480p/720p; low cost | Social short video, creative tests, batch variants |
| Seedance 2.0 | Native 2K; four-modality input; @reference system | High-quality single shots, brand assets |
| Seedance 2.5 | 30s long-form; 50 reference assets; multi-turn extension | Ad short dramas, product promos, coherent narrative |
III. Core Capabilities Explained
1. Four-Modality Input
Seedance 2.0 and 2.5 accept four input modalities — a clear market differentiator:
- Text: natural-language prompts describe scene, action, camera movement, and mood.
- Images: up to 30 reference images lock character design, scene style, and prop look.
- Video: up to 10 clips provide camera-language and action-rhythm references.
- Audio: up to 10 tracks control voice style, dialogue tone, and music mood.
2. The @Reference System
One of Seedance's most distinctive features. The @reference system lets creators tag specific elements — characters, objects, styles, sounds — inside the prompt and bind them to uploaded reference assets.
For example:
"@image1 A girl walks through the museum, art style referencing @image2, background music matching @audio1"
This enables a level of fine-grained control over the output that was previously impossible with plain text prompts.
3. Realistic Motion and Physics Simulation
Seedance excels at multi-character interaction, complex limb motion, and physical simulation. In ByteDance's internal benchmarks, Seedance 2.0 achieved multiple leading results in motion stability and physical consistency. The model renders physically accurate dynamics well — fabric moving in the wind, a skater's jump-and-land.
4. Native Audio-Visual Sync
Seedance's unified multimodal audio-video joint generation architecture processes audio and video signals from the same underlying layers, so the two are naturally synchronized at output — avoiding the desync problems common to the old "generate video first, then layer the soundtrack" pipeline.
In the prompt, sound descriptions sit alongside visual ones, covering three dimensions: voice (content + emotion + tone + speed + timbre), sound effects (concrete sound events), and background music (style and mood).
5. Character and Scene Consistency
Seedance 2.0 was designed to keep characters, costumes, lighting, and environment consistent across a generation sequence, so multi-segment video or long-form content does not feel stitched together. Seedance 2.5 further strengthens consistency and stability in multi-character scenes.
IV. Seedance 2.5: 30-Second Long-Form Narrative
Seedance 2.5 — released July 31, 2026 — is currently the most complete model in the series. Its upgrades revolve around long-form narrative, rich references, and strong controllability.
1. 30-Second Single-Pass Generation
2.5 raises single-pass video generation from 15 to 30 seconds and supports multi-turn extension, producing minutes of coherent content with unified audio-visual language.
Inside those 30 seconds, the model organizes multiple logically connected shots — setup, progression, turn, and resolution — rather than simply continuing one image. The official demo, a "one-take singer taking the stage," runs from backstage interactions, through the backstage corridor, past dancers, to the stage performance — a complete narrative arc.
2. 50 Reference Assets
Seedance 2.5 accepts up to 30 images, 10 videos, and 10 audio clips per task. This lets complex scenes — a concert with many characters, ensemble dramas — stay visually and audibly unified through rich reference material.
In the official example, a 30-second concert sequence used 18 reference images to specify the venue, pianist, cellist, violinist, lead singer, orchestra, choir, and audience.
3. White-Model (Clay Render) Reference and Fine Control
Seedance 2.5 supports white-model reference (Clay Render): users build the scene's spatial structure, character poses, motion paths, and camera angles with an untextured 3D model, and the model generates video from it — ensuring complex shots' composition and layout match the creator's intent. The model also uses the white model's spatial information to produce physically plausible lighting.
4. Precision Editing
Seedance 2.5 supports precise timestamp control for targeted edits — no need to regenerate an entire segment. Green-screen editing, perspective editing, and reference editing are also strengthened for professional film and advertising workflows.
V. Usage Tutorial
1. Preparation: Multiple Access Paths
- Jimeng AI (即梦AI) web: choose the Seedance 2.5 model in video generation.
- Doubao Pro (豆包专业版): choose the Seedance 2.5 model in video generation.
- Volcano Engine API: available to enterprises and developers via API.
- Seedance 2.0 Mini: low-cost testing in SeedVideo AI.
Seedance 2.5 is currently in global enterprise beta; API services are rolling out progressively. On FuseAITools you can use the currently available Seedance tiers directly: Seedance 2.0, Seedance 2.0 Fast, and Seedance 1.5 Pro.
2. Step One: Define Your Video Goal
Do not start from scattered ideas. Choose one clear goal: demonstrate how a product works, create a 30-second brand concept, turn a character design into a living scene, or build a short music-video storyboard.
3. Step Two: Plan the Timeline
For a 30-second video, organize the story in three to six time blocks:
| Time | Function | Content Hint |
|---|---|---|
| 0-3s | Opening hook | Eye-catching visuals, a question, or a sound |
| 3-20s | Narrative development | Show the product, story, or key message |
| 20-27s | Visual climax | Deliver the core benefit or conversion |
| 27-30s | Ending frame | Leave room for a logo, title, or call to action |
4. Step Three: Prepare Reference Assets
Use references to capture high-value information: the main character's appearance, the product subject, the visual direction of the first and last frames, key locations or architectural style, and specific costumes, props, or color palettes. Name every reference in the prompt — @image1, @image2 — and explain what that reference controls.
5. Step Four: Write Structured Prompts
Basic formula: Format and purpose → subject description → location and time → action and emotional shift → camera movement and shot size → audio description.
Formula with references: "@image1 [character] does [action] in [scene], referencing the style of @image2, with background music matching @audio1."
6. Step Five: Generate and Iterate
Submit the task and the model begins generating. If part of the result is off, use the editing features for targeted fixes instead of regenerating the whole segment.
VI. Prompt Techniques and Examples
1. Five Core Techniques
Technique 1 — Organize narrative along a timeline. For 30-second videos, use time blocks to segment the action: 0-5s establish the scene, 5-12s introduce the action, 12-20s create a turn, 20-27s drive to the visual climax, 27-30s wrap up. A timeline tells the model exactly when things should change — far more effective than listing scenes at random.
Technique 2 — Name reference assets in the prompt. Tag uploaded assets with @image1, @video2, and state what each reference controls. "Use @image1 as the reference for the character's face and costume" is far more instructive than bare "@image1."
Technique 3 — Describe dialogue and audio separately. For prompts with human voice, explicitly state the spoken content, emotion, tone, and speaking speed. Background music and sound effects need concrete descriptions of style and volume changes too.
Technique 4 — Keep reference assets consistent. Avoid conflicting reference images — such as the same character in different outfits — unless that contradiction is part of the creative intent.
Technique 5 — Use Mini for fast iteration. During ideation, test quickly with Seedance 2.0 Mini, then switch to the standard version for higher-spec final assets once the direction is confirmed.
2. Example Prompts
30-second concert sequence (Seedance 2.5): "16:9 landscape, cinematic photorealistic style, real concert-hall lighting, warm gold stage lights, formal classical concert atmosphere. Use @Image 1 as venue reference, @Image 2 as pianist reference, @Image 3 as cello reference, @Image 4 as violin reference. The lead singer strictly follows @Image 5; @Images 6-10 are references for other orchestra members; @Images 11-14 are the choir; @Images 15-18 are the audience. The lead singer walks from center stage toward the front. The pianist stands by the piano. The orchestra is distributed on both sides and the back. The choir stands at the rear of the stage. The opening is a wide high-angle view of the hall. The pianist plays the keys; the lead singer steps into the spotlight and begins to sing. The camera sweeps naturally past the violins, cellos, and orchestra — bright violin tone, warm cello tone. In the later part the choir joins. The lead singer briefly locks eyes with the front row; the audience smiles and nods slightly in response. The final shot pulls back; the song ends and the audience applauds."
30-second one-take singer backstage (Seedance 2.5 official example): "One-take handheld gimbal follow shot: the camera pushes slowly through a gap in a heavy red curtain into a warm-toned backstage dressing room. A young female singer adjusts her in-ear monitors with her back to the camera; a crew member reminds her it is time to go on. She looks back toward the camera and begins to sing City Pop. The camera pulls back and follows her through the curtain into the backstage corridor, where she interacts naturally with dancers and a crew member hands her a microphone. She then steps onto the stage with the dancers; the camera orbits behind her as the red-and-black stage design, LED screens, follow spots, haze, and reflective floor unfold. The camera finally pulls back to a stadium-wide shot revealing a full audience, light boards, glow sticks, and cheering — building the youthful, free energy of a live concert climax."
Product promo (image-to-video): after uploading the product image, describe only the motion — "The product rotates slowly on a pure white background, 360-degree orbit shot, soft overhead lighting, commercial product photography style."
Social short video (Mini): "A creator unboxes a package on a bright kitchen countertop, reacts with natural surprise, then turns the product toward the camera. Vertical social-video rhythm, handheld feel, subject clearly in focus."
VII. Use Cases and Limitations
1. Ideal Use Cases
Ad marketing and brand promotion. The @reference system and multimodal references keep brand assets — characters, products, color schemes — consistent across videos, ideal for serialized ad campaigns.
Short dramas and short-video content. Seedance 2.5's 30-second long-form narrative and multi-turn extension produce complete single-pass segments, reducing the visual seams of multi-segment stitching.
E-commerce product demos. Image-to-video turns product photos into dynamic showcases for product pages, social storefronts, and retargeting ads.
UI and product demonstrations. Seedance supports document and webpage parsing (the Wan 3.0-era benchmark capability), friendly for product-interface demos and data-chart animation.
Creative concept prototyping. Quickly visualize creative scripts for internal reviews or client pitches.
2. Limitations
Long-form narrative is still evolving. Seedance 2.5 generates 30 seconds per pass, but long-form capability remains under continuous optimization. In complex multi-scene coherent narratives, long-term consistency and physical plausibility still have room to improve.
Functional boundaries. Some Seedance 3.0-era capabilities — such as web search or model fine-tuning — may not be supported in the 2.5 version.
Pricing considerations. The Seedance 2.0 API is priced around 1 RMB per second — friendly for high-budget users but a threshold for low-cost personal projects. The Mini tier is the low-cost alternative for iteration.
Video continuation needs multiple passes. Multi-turn extension exists, but multi-minute films still require generating multiple segments and stitching them on your side.
VIII. FAQ
Q1: What is the relationship between Seedance and Sora?
A: Seedance is ByteDance's in-house video generation model — a peer product to OpenAI's Sora, but built on a different technical route. After OpenAI announced the shutdown of Sora in March 2026, China's video-generation market reshuffled, with Seedance, Kling, and Alibaba becoming the main competitors.
Q2: How long a video can Seedance 2.5 generate?
A: Seedance 2.5 generates up to 30 seconds of 1080p video per pass, with multi-turn extension for minutes of coherent content.
Q3: What input modalities does Seedance support?
A: Seedance 2.0 and above support four modalities — text, image, video, and audio. Seedance 2.5 accepts up to 30 images, 10 video clips, and 10 audio clips per task.
Q4: What is the difference between Seedance 2.0 Mini and the standard version?
A: Mini is the lightweight, low-cost tier for high-frequency iteration and batch testing. It currently outputs 4-15 seconds at 480p or 720p; the standard version supports higher resolution and fuller capability ceilings.
Q5: How do I keep a character consistent across different videos?
A: Use Seedance's @reference system — upload character reference images and tag them in the prompt. The model maintains the character's appearance consistently across the generation sequence.
Q6: Is the Seedance 2.5 API available?
A: Seedance 2.5 is progressively rolling out to Jimeng AI and Doubao Pro; API services recently launched on Volcano Ark (火山方舟). For specific integration details, always refer to the latest official announcements.
Q7: How do I control the timeline in a prompt?
A: Mark each phase with time ranges in the prompt — for example, 0-3s establishes the scene, 5-12s introduces the action, 20-27s reaches the climax. The model understands narrative structure in time order.
Conclusion
Seedance is one of the most important forces in AI video generation today. From the foundation of Seedance 1.0, to 2.0's four-modality input and @reference system, to 2.5's 30-second long-form narrative and fully upgraded multimodal references, its evolution points in one clear direction: turning AI video generation from an "entertaining creative toy" into a "usable production tool."
Seedance 2.5 pushes single-pass generation to 30 seconds, making complete one-take short films feasible; its 50-asset all-modality reference ceiling lets complex creative scenes be reproduced precisely; and white-model reference plus precision editing lets creators upgrade from "prompt engineers" to true "directors."
Of course, Seedance is not without challenges. Competition in China's AI video market is intensifying, and long-form stability still has room to improve. For content creators, marketing teams, and enterprises, understanding each version's positioning — Mini for creative testing, the standard version for final delivery, 2.5 for long-form narrative — and choosing the access path that fits your needs releases far more value than simply chasing the newest release.
Generate with the Seedance series on FuseAITools: Seedance 2.0, Seedance 2.0 Fast, Seedance 1.5 Pro, Seedance 1.0 Pro Text to Video, and Seedance 1.0 Lite Text to Video — find the AI video tool that fits your creative workflow.