Seedance 2.5 vs Veo 3.1: a flat fee against a per-second meter

These two models are priced on opposite principles, and that single difference decides most of the comparison. Veo 3.1 charges per clip and nothing else changes it: veo3_fast is 40 credits, veo3_quality is 160, and passing a duration or a resolution to the pricing call returns the same number either way. Seedance 2.5 charges per second, linearly, with no rounding tiers and no audio surcharge — 9.2 credits per second at 480p and 20 credits per second at 720p.

The useful thing about this pairing is that you do not have to choose a workflow to choose a model. Both sit in the same Text to Video picker on VdoBloom: you write a prompt, open the model list and pick either one. Both also handle photos — Veo 3.1 through first-and-last-frame and reference-to-video modes, Seedance 2.5 through the Image to Video tab, where an uploaded photo becomes the clip's first frame. So the decision really is about price and length rather than about which door you came through.

Once that is out of the way, the cost question becomes tractable. Veo 3.1 Fast at a flat 40 credits is cheaper than Seedance 2.5 at almost every length, because 2.5's meter passes 40 credits after four seconds. Veo 3.1 Quality at 160 is the interesting one: Seedance 2.5 stays under it through 17 seconds at 480p and ties it exactly at 8 seconds at 720p. Below are the crossovers, and what each model gives up to hit its price.

Open Text to Video

What this tool does

  • Veo 3.1 is billed per clip on VdoBloom — 40 credits for veo3_fast, 160 for veo3_quality — and the figure does not move when a duration or resolution is supplied; there is no duration or resolution multiplier.
  • Seedance 2.5 is billed linearly per second: 9.2 credits/sec at 480p and 20 credits/sec at 720p, with no audio surcharge. A 4-second render is 37 or 80 credits; a 30-second render is 276 or 600.
  • The cheapest possible Seedance 2.5 render — 4 seconds at 480p — is 37 credits, three credits under Veo 3.1 Fast's flat 40. That is the only length at which 2.5 undercuts Veo 3.1 Fast; at 5 seconds it is already 46.
  • Against veo3_quality's flat 160 credits, Seedance 2.5 at 480p stays cheaper all the way through 17 seconds (156 credits) and crosses over at 18 seconds (166).
  • At 720p the two meet exactly at 8 seconds: Seedance 2.5 costs 160 credits and veo3_quality costs 160 credits. Past that, every extra second on 2.5 costs 20 credits and Veo costs nothing extra.
  • Veo 3.1 has no duration selector on VdoBloom. Seedance 2.5 offers every whole second from 4 to 30, which is 27 duration options and the longest single generation in the VdoBloom roster.
  • Both models are in the Text to Video picker, so the choice between them is a dropdown rather than a different workflow. Seedance 2.5 is also selectable in Image to Video and on the Seedance Effects tab.
  • Prompt room differs sharply in Seedance 2.5's favour: it accepts up to 30,000 characters, which matters when a single generation has to carry 30 seconds of action.
  • Resolution ceilings run the other way to duration: Seedance 2.5 offers 480p and 720p only, while Veo 3.1's HD retrieval reaches 1080p, though only for clips generated at 16:9.
  • Upload a photo as the first frame in Seedance 2.5's Image to Video flow and the aspect ratio is forced to adaptive, so the output follows the source photo's shape. Veo 3.1's aspect ratio picker offers 16:9 and 9:16 as an explicit choice.

How it works

  1. 1.Start from the length, not the tab

    Both models are in the Text to Video picker, so either is a dropdown away once you have written the prompt. What actually separates them is runtime: Veo 3.1 returns whatever length Veo returns, while Seedance 2.5 lets you name any whole second from 4 to 30. If the edit needs a specific duration, that alone decides it.

  2. 2.Fix the clip length before you compare prices

    Veo 3.1 gives you no duration control, so its 40 or 160 credits buys whatever it produces. Seedance 2.5's meter runs from 37 credits at the low end to 600 at the top. Knowing your target runtime is what turns this from a preference into arithmetic, and the only question left after that is whether 480p or 720p carries it.

  3. 3.Use 480p for anything you might discard

    At 9.2 credits per second, a 4-second Seedance 2.5 test at 480p is 37 credits and a 10-second one is 92. The same renders at 720p are 80 and 200. Since the model tops out at 720p anyway, 480p is the honest draft tier — check the shot reads correctly before paying the 720p rate.

  4. 4.Frame the upload for the ratio you want

    If you are starting from a photo, open Image to Video: a Seedance 2.5 job whose photo goes in as the first frame has its aspect ratio coerced to adaptive, so the output inherits the shape of what you uploaded. Crop the source to 9:16 before uploading if the deliverable is vertical. On Veo 3.1 the ratio is a picker instead, and choosing 16:9 is what makes the 1080p HD version retrievable afterwards.

  5. 5.Run the crossover arithmetic for your actual length

    Multiply your target seconds by 9.2 for 480p or 20 for 720p, then compare to 40 and 160. At 4 seconds Seedance 2.5 beats Veo Fast; from 5 up, Veo Fast is cheaper. Against Veo Quality, 2.5 wins through 17 seconds at 480p and through 7 at 720p.

  6. 6.Keep both on one balance and judge the output

    Veo 3.1 and every Seedance variant draw on the same VdoBloom credit balance, alongside 54 video model variants across 14 families. Because they share the Text to Video picker, the same prompt can be run through both and the results compared directly. Price only sets how many attempts you get; it does not tell you which model understood your scene.

Frequently asked questions

Which is cheaper, Seedance 2.5 or Veo 3.1?

It depends entirely on the length and the Veo variant. Against veo3_fast's flat 40 credits, Seedance 2.5 is cheaper only at 4 seconds at 480p, where it costs 37; from 5 seconds onward the per-second meter passes Veo and keeps climbing. Against veo3_quality's flat 160 credits, Seedance 2.5 is cheaper for much longer — through 17 seconds at 480p (156 credits) and through 7 seconds at 720p, with an exact tie at 8 seconds where both cost 160.

Can I type a prompt and pick Seedance 2.5 in Text to Video?

Yes. Open /dashboard/video-creation/text-to-video/, write your prompt, and Seedance 2.5 is in the model list under the Seedance family, in the same picker as Veo 3.1. Selecting it swaps the duration grid to every whole second from 4 to 30 and the resolution list to 480p and 720p, and it accepts prompts up to 30,000 characters. The same model is also available in Image to Video and on the Seedance Effects tab, where a curated preset supplies the prompt instead.

Does Veo 3.1 get more expensive for longer clips?

No, and it also has no way to ask for a longer clip. veo3_fast is 40 credits and veo3_quality is 160 regardless of what else you send with the request. That predictability is Veo's real advantage: if you are running many variations of the same shot at a fixed budget, a flat fee is easier to plan than a meter. The trade is that you cannot order a specific runtime.

Which one can make a 30-second video?

Only Seedance 2.5. It accepts every whole second from 4 to 30 in a single generation, costing 276 credits for 30 seconds at 480p or 600 at 720p, and you can order that from Text to Video, Image to Video or the Seedance Effects tab. Veo 3.1 has no duration selector at all, so there is no setting that would produce a 30-second Veo clip on VdoBloom.

Which gives higher resolution?

Veo 3.1. Seedance 2.5 offers 480p and 720p only — it has no 1080p or 4K tier, unlike Seedance 2, which reaches 4K. Veo 3.1's HD version is 1080p, with the caveat that it is retrievable only for clips generated at 16:9. If the deliverable has to be above 720p, Seedance 2.5 is not the model, whatever the length.

Does either produce audio?

Seedance 2.5 generates audio natively and the switch is sent as on for every render, at no extra credit cost — the per-second rate is 9.2 and 20 whether audio is on or off. This differs from Seedance 1.5 Pro, which doubles its rate when audio is enabled. Veo 3.1 does not expose an audio toggle in VdoBloom's controls.

Can I animate a photo with either one?

Yes, through different mechanics. Veo 3.1 offers first-and-last-frame, which takes 1-2 images and generates the motion between them, and reference-to-video, which takes up to 3 images to guide the look but runs only on veo3_fast at 16:9. Seedance 2.5 animates a photo from the Image to Video tab, where the upload becomes the first frame — and that path forces the output aspect ratio to match your photo, so crop it first.

Related tools

Seedance 2.5: the 30-second model, and how to run it

ByteDance Seedance 2.5 renders 4-30 seconds at 480p or 720p only. Pick it in Text to Video, Image to Video or Effects. 30s at 480p is 276 credits.

Seedance 2.5 price: the full credit table, per second and per clip

Seedance 2.5 costs 9.2 credits/sec at 480p and 20 at 720p. Cheapest render is 37 credits (4s, 480p); a full 30s at 720p is 600 credits.

Seedance 2.5 vs Kling 3: length ceiling against resolution ceiling

Seedance 2.5 runs 30s for 276 credits at 480p. Kling 3.0 stops at 15s but reaches 4K and costs 84 credits for 15s. Like-for-like totals inside.

Seedance 2.5 vs Seedance 2: duration against resolution

Seedance 2.5 runs 30s but caps at 720p; Seedance 2 stops at 15s and reaches 4K. 15s at 720p costs 300 vs 244 credits. The full maths.

ByteDance Seedance 2.5 online, without an API key

Run ByteDance Seedance 2.5 in a browser with no API key. Cheapest render is 37 credits for 4s at 480p, more than the 10 free signup credits.

30-Second AI Video Generator: The Longest Single Clip on VdoBloom

ByteDance Seedance 2.5 renders a full 30 seconds in one generation: 276 credits at 480p, 600 at 720p. The next longest on VdoBloom is 16 seconds.

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