聊天讨论 Seedance 2.0: ByteDance's AI video model that generates audio and video at the same time
Seedance 2.0: ByteDance's AI video model that generates audio and video at the same time
- Seedance 2.0 is ByteDance's latest AI video generator (February 2026). Audio and video are created together in one pass, not stitched after the fact.
- It accepts up to 12 reference files: images, videos, audio clips, and text. More control than anything else on the market right now.
- Output goes up to 2K resolution. Generation is about 30% faster than the previous version.
- You can try it for free at seedance2.so. No setup, no API keys.
- Characters stay consistent across shots. Physics look right. But if you need clips longer than 15 seconds, look elsewhere.
ByteDance built this. That matters.
ByteDance runs TikTok, Douyin, and CapCut. They process more video than almost any company on earth. So when their Seed research team (labs in Beijing, Singapore, and the US) shipped Seedance 2.0 in February 2026, people noticed.
The AI video generation market was valued at $614.8 million in 2024 and is projected to reach $2.56 billion by 2032 at a 20% annual growth rate (Fortune Business Insights, 2024). Google has Veo 3.1. OpenAI has Sora 2. Kuaishou has Kling 3.0. All of them generate silent video. Seedance 2.0 generates audio and video from one pipeline, simultaneously.
That single difference changes how you actually work with the tool.
What's new in Seedance 2.0
Audio and video from the same model
Most AI video tools give you a mute clip. Then you hunt for audio, record something, or use another AI tool to generate sound. Then you spend time syncing it all up. If you've ever tried matching lip movements to a generated talking head, you know the drift problem. It's maddening.
Seedance 2.0 doesn't work that way. The model generates audio alongside the video. Dialogue comes out with accurate lip movement in English, Mandarin, Cantonese, and several other languages. Background sounds match the scene. Music follows the rhythm of the visuals.
The key difference: audio and visual signals inform each other during generation. A door slam happens when the door closes, not 200ms later. A character's mouth actually shapes the words they're saying. On Hacker News, one commenter called it "the first model where audio doesn't feel like an afterthought" (Hacker News, February 2026).
I've been tracking this space for a while, and that audio co-generation is the feature that made me stop and pay attention.
Mix up to 12 reference files
This is where things get interesting if you do creative or commercial video work. You can feed Seedance 2.0 up to 12 reference assets at once:
| Input type | Limit | What it does |
|---|---|---|
| Images | Up to 9 | Visual style, character reference, scene layout |
| Video clips | Up to 3 (15s total) | Motion patterns, camera movement |
| Audio clips | Up to 3 (15s total) | Rhythm, voiceover reference |
| Text prompt | 1 | Narrative direction, action description |
You tag each file with an @mention: @Image1 for the first frame, @Video1 for camera movement, @Audio1 for beat. Sora 2 and Kling 3.0 take text and images. Neither takes audio as a reference. That's a gap.
Physics that look right
AI video has a physics problem. Objects float. Water acts like jelly. People clip through solid walls.
Seedance 2.0 is better at this than previous versions. Not perfect. But a skateboard trick actually follows a momentum arc. A dropped glass breaks into believable fragments. Gravity works. The gap between "clearly AI" and "wait, is that real?" has gotten smaller. Still visible sometimes, but smaller.
Characters don't change between shots
Seedance 1.0 had the same problem every model had: generate a character in scene one, and by scene two they've gained a new hairstyle or lost a jacket pocket.
Seedance 2.0 keeps faces, clothes, and body proportions consistent across shots and camera angles. One freelancer described using it for a product showcase: "The lighting and motion were next-level. It feels like working with a trained cinematographer, not an AI model" (ChatArtPro review, 2026).
That's one person's experience, and mileage varies. But the consistency is a visible step up from what came before.
Edit videos with text commands
You don't have to regenerate a full clip to change something. Describe what you want different: swap a character, drop in a new object, extend the scene. The model modifies the video while keeping everything else intact. It's like a non-destructive editing layer built on top of the generation engine.
How Seedance 2.0 compares to the competition
No model wins everywhere. Here's what the landscape looks like:
| Feature | Seedance 2.0 | Sora 2 | Kling 3.0 | Veo 3.1 |
|---|---|---|---|---|
| Max resolution | 2K (2048x1080) | 1080p | 1080p | 4K |
| Native audio | Yes | No | No | Yes |
| Multimodal input | 12 files (image/video/audio/text) | Text + image | Text + image + motion brush | Text + image |
| Physics accuracy | Good | Best available | Decent | Good |
| Character consistency | Good | Decent | Good | Decent |
| Max clip length | ~15 seconds | ~60 seconds | ~10 seconds | ~8 seconds |
| Generation speed (5s clip) | 90s-3min | 3-5min | 1-2min | 2-4min |
| API pricing estimate | $0.20-0.40/s | $0.30-0.50/s | $0.15-0.30/s | $0.30-0.60/s |
Use Seedance 2.0 for: Audio-inclusive video, multi-reference workflows, multi-shot projects where characters need to stay consistent (product demos, short films, episodic content).
Use Sora 2 for: Longer clips (up to 60 seconds), physics-heavy scenes, research where physical accuracy matters more than audio.
Use Kling 3.0 for: Quick generations. Also has a motion brush for painting movement paths onto images.
Skip Seedance 2.0 if: You need clips longer than 15 seconds from a single generation. You'll be stitching segments together, and that adds a step.
Try Seedance 2.0 at seedance2.so
The simplest way to test the model is Seedance2.so. No API keys, no GPU, no model version management. Just a browser.
It supports all the generation modes:
- Text-to-video: describe a scene, get video with audio
- Image-to-video: upload a photo, animate it with a text prompt
- Audio-to-video: upload a track, get visuals that match the rhythm
- Multi-reference: mix images, clips, and audio together
A 5-second clip at 1080p usually takes under 3 minutes. For iterating on prompts and comparing outputs, that turnaround is fast enough to stay in a creative flow. Several freelance creators I've read about use browser tools like this to prototype ideas before they commit to a full production pipeline.
What people are actually using it for
Short drama and episodes. You give it a script and a character reference image. It generates scenes that connect logically. Early tests show narrative coherence close to what you'd expect from professional short drama production. Close, not identical.
Product videos. Upload a product photo, describe the setting. Out comes a demo video with ambient audio included. One creator on ChatArtPro put it well: "The model adapts easily to different styles, whether it's lifestyle, product, or promo. It keeps the motion smooth, and the visual tone stays exactly where I want it" (2026).
Music videos. This one surprised me. Upload a track as the audio reference. Seedance 2.0 generates visuals that hit beats and match tempo changes. Camera cuts sync to the music. That used to require a motion graphics artist and hours of keyframe work.
Multilingual content. The lip-sync works across languages. Record your script in English, then swap it to Mandarin. The character's mouth adjusts. For brands producing content in multiple markets, that's a real time saver.
Where Seedance 2.0 falls short
I don't want to oversell this. There are genuine limitations.
The 15-second clip ceiling is the biggest one. If you're making anything longer, you need to generate multiple clips and stitch them. Sora 2 goes up to 60 seconds in a single pass. That's a significant workflow difference.
Artifacts still show up. Hands get weird sometimes. Busy scenes with lots of moving parts can produce morphing clothes or objects that change size. It's better than Seedance 1.0, but "better" doesn't mean "gone."
It's cloud-only. Your work runs on ByteDance's servers. No local option. If your production requires an air-gapped environment, this tool is out.
The audio is good enough for prototyping and demos. For a final deliverable, you'll probably still want a sound designer to polish things up. The generated audio is functional, not broadcast-quality.
None of these are surprising for early 2026. But worth knowing before you build a workflow around the tool.
FAQ
Is Seedance 2.0 free to use?
You can try it free through Seedance2.so and ByteDance's Dreamina (Jimeng) platform. Free tiers have limits on resolution and how many clips you can generate per day. Paid plans and API access are available for heavier use.
How does Seedance 2.0 compare to Sora 2?
Different tools for different jobs. Seedance 2.0 is better for multimodal input (the 12-file reference system), native audio, and 2K output. Sora 2 is better for longer clips (up to 60 seconds) and physical realism. Some production teams use both: Seedance 2.0 for drafts and remixing, Sora 2 for final renders.
Can it generate talking head videos with lip sync?
Yes, and it's probably the best tool for this right now. The lip sync is generated alongside the video, not layered on after. It works in English, Mandarin, Cantonese, and other languages. Drift problems that haunt other tools are mostly gone here.
What hardware do I need?
A web browser. That's it. Seedance 2.0 runs entirely on ByteDance's cloud. Access it through Seedance2.so or via API. No GPU on your end.
How long does generation take?
A 5-second clip at 1080p takes about 90 seconds to 3 minutes. 2K takes longer. Fast enough that you can iterate on prompts without losing your train of thought.
Where this is heading
Seedance 2.0 does one thing that nobody else does well yet: it generates audio and video together, from a single model, with enough quality to be useful for real work. The multimodal input system gives you more control than competing tools, and the character consistency is good enough for multi-shot storytelling.
It's not the right pick for everything. Long clips, pixel-perfect physics, or offline workflows are better served elsewhere. But for product videos, short-form content, music videos, and multilingual production, it's a strong option that's worth testing.
Head to Seedance2.so, upload something, write a prompt, and judge for yourself. Two or three test generations will tell you if this fits your work.