ByteDance's Seed team
Seedance 1.5 Pro
ByteDance's Seedance 1.5 Pro in your browser: 4–12 second videos with speech, effects and ambience generated in the same pass, from a text prompt or a start image — with no API key and no subscription.
- Release
- Technical report dated 15 December 2025; Vercel's AI Gateway lists it from 16 December 2025
- Architecture
- Dual-branch Diffusion Transformer with a cross-modal joint module, so picture and sound are generated together
- Speech
- Lip-synced dialogue in Chinese, English, Japanese, Korean, Spanish and Indonesian, plus dialects such as Sichuanese and Cantonese (per Vercel's model listing)
- Modes on Kenerate
- Text to video, image to video and video extend
- Length
- 4 to 12 seconds per clip, in whole seconds
- Resolution
- 480p, 720p or 1080p, in 16:9, 9:16, 1:1, 4:3, 3:4 or 21:9
- Real specs
- Official sources
- Free to start
- No watermark
Updated by the Kenerate AI team
On this page
What is Seedance 1.5 Pro?
What is Seedance 1.5 Pro?
Seedance 1.5 Pro is ByteDance's joint audio-video model, published in December 2025, that makes 4–12 second clips with lip-synced speech, sound effects and ambience from text or a start image. On Kenerate AI it costs 7.2, 15.6 or 31.2 credits a second at 480p, 720p or 1080p with sound, and half that with sound off — so a 5-second clip is 36, 78 or 156 credits. A cheaper Seedance 1.5 Fast runs at 720p and 1080p for 12 or 18 credits a second.
Key facts
- Official name
- Seedance 1.5 pro
- Model ID
- bytedance/seedance-v1.5-pro
- Maker
- ByteDance Seed
- Released
- December 2025
- Clip length
- 4–12 s
- Resolution on Kenerate
- 480p · 720p · 1080p
- Aspect ratios
- 16:9 · 9:16 · 1:1 · 4:3 · 3:4 · 21:9
- Inputs
- Text · start image
- Sound
- Native, toggle — off is half price
- Billing
- Per second, no subscription
Models
Seedance 1.5 Pro on Kenerate
Every version in the generator, and what each is good at.
ByteDance
Seedance 1.5 Pro
- Reference images
- Start image
- Output
- 4–12 s · 480p–1080p
Open Seedance 1.5 ProBest for
Full model — sound off halves the price
ByteDance
Seedance 1.5 Fast
- Reference images
- Start image
- Output
- 4–12 s · 720p or 1080p
Open Seedance 1.5 FastBest for
Faster, cheaper at 720p and 1080p
ByteDance
Seedance 1 Pro
- Reference images
- Start image
- Output
- 2–12 s · 480p–1080p
Open Seedance 1 ProBest for
Previous generation — silent video
ByteDance
Seedance 2.0
- Reference images
- 9 images · 3 clips · 3 audio
- Output
- 4–15 s · 480p–4K
Open Seedance 2.0Best for
Next generation — multi-reference, up to 4K
From our tests
Strengths and limits
Good at
- Sound in the same render: dialogue with lip-sync, effects and ambience, with no separate voice-over step.
- Cheap for a sound model — a 5-second 480p clip with audio is 36 credits, and 18 with sound off.
- Speech in six languages plus Chinese dialects, useful for short dramas and localized ads.
- Fixed-camera toggle and seed control for steady product shots and repeatable takes.
Limits
- No real Seedance 1.5 Pro clips on this page yet — we only show a model's own outputs, so run a short 480p test first.
- Not on Kenerate's free plan: video needs any one-time credit pack (from $15 for 1,300 credits).
- Tops out at 1080p and 12 seconds per clip; for 4K or multi-reference prompts use Seedance 2.0.
- One start image only on Kenerate — no reference clips or audio inputs.
How to
How to use Seedance 1.5 Pro on Kenerate
Step 1
Open the video studio
Go to /app/video and pick Seedance 1.5 Pro (the button on this page selects it), or Seedance 1.5 Fast. Video needs any one-time credit pack.
Step 2
Add a start image (optional)
Upload a still to animate it, or leave it empty for text to video. With an image, a motion prompt is required.
Step 3
Describe the shot and the sound
Write subject, action, camera move and mood. Put spoken lines in quotes, say who speaks and in which language.
Step 4
Pick length, resolution and ratio
Choose 4–12 seconds, 480p to 1080p and one of six aspect ratios; switch sound or the fixed camera on or off. The credit cost shows before you generate.
See it in the app
Open Video Studio in Text to Video mode and write the shot — subject, action, camera move and light.
Watch the tour · 1:19
Text, image & reference to video, models, edit, extend & chat
Chapters
FAQ
Seedance 1.5 Pro questions
9 questions
What is Seedance 1.5 Pro?
Seedance 1.5 Pro is ByteDance's audio-video model from its Seed team, described in a technical report dated 15 December 2025. It generates video and sound together — speech with lip-sync, effects and ambience — from a text prompt or a start image, in 4–12 second clips.
Link to this answerHow much does Seedance 1.5 Pro cost on Kenerate?
It's billed per second. With sound it costs 7.2, 15.6 or 31.2 credits a second at 480p, 720p or 1080p, rounded up per clip; with sound off it's half. A 5-second clip with sound is 36, 78 or 156 credits; a 10-second 720p clip is 156. Credits come in one-time packs from $15 for 1,300.
Link to this answerIs Seedance 1.5 Pro free?
Not on Kenerate's free plan — video needs any one-time credit pack, with no subscription. The cheapest Seedance 1.5 Pro clip is 4 seconds at 480p with sound off, for 15 credits.
Link to this answerSeedance 1.5 Pro vs Seedance 1.5 Fast — which should I use?
Both take text or a start image, make 4–12 second clips and can generate sound. Fast only offers 720p and 1080p and costs 12 or 18 credits a second with sound, versus 15.6 or 31.2 on Pro. Use Fast for quick 1080p takes, Pro when you want 480p drafts or the full model's quality.
Link to this answerDoes Seedance 1.5 Pro make sound?
Yes. Picture and audio come from the same model, so speech is lip-synced to the characters. ByteDance highlights multilingual and dialect lip-sync; Vercel's listing names Chinese, English, Japanese, Korean, Spanish and Indonesian plus Sichuanese and Cantonese. On Kenerate, switching sound off halves the price.
Link to this answerHow long can Seedance 1.5 Pro videos be?
4 to 12 seconds per clip, in whole seconds. To go longer, extend a clip with new seconds in the studio, or use Seedance 2.0 (up to 15 s) or Seedance 2.5 (up to 30 s).
Link to this answerWhat resolution does Seedance 1.5 Pro output?
480p, 720p or 1080p on Kenerate, in 16:9, 9:16, 1:1, 4:3, 3:4 or 21:9. Vercel lists the model at 24 frames per second.
Link to this answerSeedance 1.5 Pro vs Seedance 2.0 — what changed?
Seedance 2.0 (February 2026) adds multi-reference input — up to 9 images, 3 clips and 3 audio files — clips up to 15 seconds and output up to 4K on Kenerate. It costs 72 credits a second at 720p, against 15.6 for Seedance 1.5 Pro. For single-shot clips with dialogue on a budget, 1.5 Pro is the cheaper choice.
Link to this answerWhat is bytedance/seedance-v1.5-pro?
It's the model ID API platforms use for Seedance 1.5 Pro. On Kenerate you don't need an API key — the same model runs in the browser as kenerate/seedance-v1.5-pro.
Link to this answerIn depth
Seedance 1.5 Pro, in depth
Background, how to prompt it, and when to pick something else.
On this page
What a Seedance 1.5 Pro clip costs
Kenerate bills Seedance 1.5 Pro per second of output and rounds each clip up to whole credits. Sound off halves every price below.
- 480p — 36 credits for 5 s, 72 for 10 s, 87 for 12 s. Drafts and testing prompts.
- 720p — 78 credits for 5 s, 156 for 10 s, 188 for 12 s. Social clips and most finished work.
- 1080p — 156 credits for 5 s, 312 for 10 s, 375 for 12 s. Final renders; Seedance 1.5 Fast does 5 s at 1080p for 90.
Prompting Seedance 1.5 Pro for dialogue
Seedance 1.5 Pro was built for joint audio-video generation with lip-sync across languages and dialects [1][2]. Name who speaks, put the line in quotes and say the language — "the chef turns to camera and says in Spanish: 'Listo, a comer'". Add the ambience you want (kitchen clatter, rain, crowd) and keep one main action per clip. For a fixed product shot, switch on the fixed-camera toggle and describe only the subject's motion.
Where Seedance 1.5 Pro fits in the Seedance family
Seedance 1 Pro makes silent video; 1.5 Pro added native sound and dialogue [1]; Seedance 2.0 added multi-reference input and longer clips; Seedance 2.5 goes up to 30 seconds. On Kenerate all of them run on one credit balance with one-time packs, so you can draft on 1.5 Pro and move a shot to 2.0 when you need references. Don't use real people's likenesses or copyrighted characters without permission.