Do Seedance 2.5 and Veo 3.1 both generate sound?

Yes. Both make picture and sound together. Seedance 2.5 does it on clips of up to 30 seconds, and its sound can be switched off; Veo 3.1 always generates sound, on clips of 4, 6 or 8 seconds, and is built around audio that lands on the action.

Seedance 2.5 or Veo 3.1: which is better for talking or lip-synced characters?

Seedance 2.5 when the words are fixed: give it an image of the character and your audio clip, such as an Elevenlabs v4 voiceover, and it lip-syncs the character to it. Veo 3.1 when a short line can be generated from the prompt and has to land on an exact moment. Google notes that speech in shorter segments is still being improved, so listen to every line.

Seedance 2.5 or Veo 3.1: which is better for product and ad videos?

Seedance 2.5 for longer ads and anything built from your own material: it takes product photos, a character sheet, music or a voice clip as references and makes up to 30 seconds in one take. Veo 3.1 for short hooks where a line or a sound effect has to hit on cue, at up to 4K. For a 21:9 or square ad, use Seedance 2.5; Veo 3.1 offers 16:9 and 9:16.

Do I need two subscriptions for Seedance 2.5 and Veo 3.1?

No. Seedance 2.5 and Veo 3.1 are both on every PromptWise plan, from $19 a month, along with the rest of the 40+ models, and every model is available as soon as you sign up. Each clip uses credits from your monthly balance; current costs are on the PromptWise pricing page.

Seedance 2.5 vs Veo 3.1: Which AI Video Model?

Q: Seedance 2.5 vs Veo 3.1: which is better?

Seedance 2.5 when the scene needs length: up to 30 seconds of picture and sound from one generation. Veo 3.1 when a line of dialogue or a sound effect has to land on an exact moment; Google lists its clips at 4, 6 or 8 seconds, so a longer scene means several clips and an edit.

In short: Seedance 2.5 is the pick when a scene needs length or lots of references: up to 30 seconds of picture and sound from one generation, plus lip-sync from an image and audio. Veo 3.1 is the pick when a line of dialogue or a sound effect has to land on an exact moment, on clips of 4, 6 or 8 seconds at up to 4K. Seedance 2.5 and Veo 3.1 share one PromptWise plan, from $19 a month.

Both models make picture and sound together, so they’re natural rivals for talking scenes, UGC ads and short films with audio. Seedance 2.5 comes from ByteDance and Veo 3.1 from Google DeepMind. They take different routes: Seedance goes long and takes lots of references, while Veo keeps clips short and focuses on tight audio sync.

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Seedance 2.5, Veo 3.1 and Elevenlabs v4 are all in the $19 Starter plan. Every model is available as soon as you sign up. See plans

Seedance 2.5 vs Veo 3.1 at a glance

	Seedance 2.5	Veo 3.1
Made by	ByteDance (Seed team)	Google DeepMind
Background	Released 31 July 2026	Google’s update to Veo 3
Versions in PromptWise	Seedance 2.5 (plus 2.0, 2.0 Fast, 2.0 Mini, 1.5 Pro)	Veo 3.1 Quality, Fast and Lite
Clip length in PromptWise	4–30 seconds	4, 6 or 8 seconds
Top resolution in PromptWise	1080p (Seedance 2.0 goes to 4K)	4K on Quality and Fast; 1080p on Lite
Aspect ratios	16:9, 9:16, 1:1, 4:3, 3:4, 21:9	16:9, 9:16
Sound	Yes, can be switched off	Always on
Inputs in PromptWise	Start and end frame; up to 30 images, 10 video clips and 10 audio clips (50 files in total)	Start and end frame
Lip-sync to your own audio	Yes, from an image and an audio clip	No; speech is generated from the prompt
Best for	Longer scenes, scripted voiceovers, reference-heavy ads	Short dialogue and effects that land on cue

What is Seedance 2.5?

ByteDance’s Seed team released Seedance 2.5 on 31 July 2026 and framed the launch around “30-second storytelling”: twice the 15 seconds of Seedance 2.0, in a single generation, with picture and sound made together on the audio-video architecture 2.0 introduced. The other big change is how much you can feed it, with up to 30 images, 10 videos and 10 audio clips as references. ByteDance also claims smoother motion and more realistic visuals.

For scenes with dialogue, it’s the model we reach for first. Veo is great for a single line, but most of our scenes run longer than 8 seconds. Seedance 2.5 gives us up to 30 seconds with the sound in one take, so there’s nothing to stitch together.

What is Veo 3.1?

Google DeepMind built Veo 3.1 for picture and sound that arrive together, under the banner “Video, meet audio”. For talking scenes, the relevant upgrades over Veo 3 are richer audio and closer prompt adherence, so a line written in quotation marks tends to come out as written; Google also cites a better grasp of cinematic styles and image-to-video. PromptWise offers three versions: Quality for the take you keep, Fast for day-to-day clips and Lite for trying ideas out.

Clip length and storytelling

Length is the biggest difference. Seedance 2.5 can make a whole 30-second scene, with its sound, in one generation: a complete product demo, a short testimonial or a story beat with a beginning, middle and end. Veo 3.1 clips are 4, 6 or 8 seconds, so each one is a single beat, and a longer scene is several clips joined in an editor.

Dialogue and audio sync

Veo 3.1 is built around sound that matches the action, so for a short scene where a line or an effect has to hit an exact moment (a door slam, a glass clinking, a punchline), it’s usually the faster route to a finished clip. Google is also clear that natural, consistent speech, “particularly for shorter speech segments”, is still being improved, so listen to every line before you publish.

Seedance 2.5 generates sound with the picture too, and adds something Veo doesn’t do in PromptWise: lip-sync to your own audio. Give it an image of a character and an audio clip, and it makes the character speak those exact words. That’s the better choice when the script and voice are fixed, such as a brand voiceover or a scripted UGC read.

Prompt: A man at a kitchen table opens a parcel, looks surprised and says “They actually sent the green one!”, the tape rips and paper rustles, 9:16.

Scripted voiceovers and UGC ads

For UGC ads, the two models suit different scripts:

Short hook, generated voice: Veo 3.1. Describe the creator and the setting, put the line in quotation marks and pick 9:16. Keep the line short enough for 8 seconds.
Set script, chosen voice: Seedance 2.5. Make the voiceover with Elevenlabs v4 in the same studio, give Seedance 2.5 an image of your creator plus the audio, and generate a clip of up to 30 seconds.

Prompt: A woman in her twenties holds up a jar of face cream to her phone camera in a bright bathroom and talks about why she switched, 9:16, natural light.

Realism and look

Both produce realistic, cinematic footage. ByteDance points to smoother motion and more realistic visuals in 2.5, and in our testing it gives the better overall result in most areas. Veo 3.1’s strengths are prompt adherence and cinematic style, according to Google, which makes it reliable when you describe a specific camera move or lighting set-up. For a shot that matters, run the same prompt on both.

Prompt: Slow dolly shot through a misty forest at dawn, a deer lifts its head and looks at the camera, birdsong and a distant stream, 21:9 or 16:9.

Resolution and formats

Veo 3.1 Quality and Fast go up to 4K; Seedance 2.5 goes up to 1080p. If you need Seedance at 4K, Seedance 2.0 runs up to 4K on clips of up to 15 seconds. Seedance 2.5 has six aspect ratios, including 21:9 for a cinematic frame and 1:1, 4:3 and 3:4 for feeds; Veo 3.1 offers 16:9 and 9:16.

References and control

If you have material to work from (product photos, a character sheet, a music track, a voice clip), Seedance 2.5 can take it all in as references. Veo 3.1 in PromptWise takes a start and an end frame, which is a simple, reliable way to control a shot’s first and last moments. Both work well from a start frame made in the same studio with Nano Banana Pro or GPT Image 2.5.

Which should you pick?

If you’re making…	Use	Why
A 15–30 second scene in one take	Seedance 2.5	Up to 30 seconds with sound
A scripted voiceover or UGC read	Seedance 2.5	Lip-sync from an image and your audio
A short line of dialogue or an effect on cue	Veo 3.1	Sound built to match the action
A 4K deliverable	Veo 3.1 Quality or Fast (or Seedance 2.0)	Seedance 2.5 tops out at 1080p
A 21:9 or square clip	Seedance 2.5	Veo 3.1 offers 16:9 and 9:16
A clip you’ll score yourself	Seedance 2.5 with sound off	Veo 3.1 always generates sound
Quick tests before the final take	Veo 3.1 Lite or Seedance 2.0 Fast	Faster versions for drafts

Use Seedance 2.5 and Veo 3.1 on one plan

Talking scenes often need both: a Veo 3.1 hook with a line on cue, then a longer Seedance 2.5 take with your voiceover. One PromptWise plan covers both, on every tier including Starter, together with Elevenlabs v4 for the voice and the rest of the 40+ models. Every model is available as soon as you sign up.

Plan	Price	Credits per month	Images and videos at once
Starter	$19/month	275	2
Plus	$39/month	800	4
Pro (most popular)	$79/month	1,800	6
Max (best value)	$149/month	3,800	8

Larger allowances: Max 2, 6,500 credits for $249 a month; Max 3, 9,500 credits for $349. Save up to 45% by paying yearly. All prices are in US dollars, before VAT.

How much a clip uses depends on the model, the clip length and the resolution, so a 30-second Seedance 2.5 take and an 8-second Veo 3.1 clip are priced differently. PromptWise pricing and models lists current costs, and the Generate button shows the exact number before you commit. Each billing month brings a fresh balance with no rollover, and credits for a failed generation are refunded automatically. More on billing, cancelling and refunds.

How to compare them yourself in PromptWise

Open Studio after signing up and switch to video; Seedance 2.5 and Veo 3.1 are on every plan.
Choose Seedance 2.5 in the Seedance section of the menu.
Pick a shot Veo can also make: 16:9 or 9:16 and 4, 6 or 8 seconds, with one spoken line in quotation marks. Generate.
Move to Veo 3.1 Quality, Fast or Lite and run the identical prompt.
Listen first, then look. Check whether the line lands at the right moment and whether the lips match, then compare the picture. The cost of each clip appeared on the Generate button before it ran.

Try both in PromptWise

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