Seedance 2 Fast: Text & Image to Video Online
Bottom line
Seedance 2's same 4-15s durations and six aspect ratios, capped at 720p for quicker, cheaper drafts. Start from a prompt or a still image in the Image to Video tool; VdoBloom shows the exact credit cost before each Seedance 2 Fast run, with no separate Seedance account.
Seedance 2 Fast is the draft tier of ByteDance's Seedance 2 family on VdoBloom. It keeps everything that defines the flagship — one-second duration control from 4 to 15 seconds, six aspect ratios including 21:9 cinema-wide, text and image input from the same page — and trades away the upper resolution tiers, topping out at 720p instead of 1080p or 4K.
Because durations and framing match the flagship exactly, a composition you settle on with Fast carries straight over to Seedance 2 without re-composing: what you see at 480p in a 21:9 frame is what you'll get at 4K in the same frame later. Fast also supports reference-video mode at a genuinely cheaper per-second rate than its plain generation price, billed the same input-plus-output way as the rest of the family, capped at 15 input seconds.
VdoBloom shows the exact credit price for your settings before you generate. Audio generates by default at no extra charge, and failed jobs are refunded automatically.
What Seedance 2 Fast costs, with worked examples
Per-second rates without a reference video: about 4.8 credits/second at 480p, 10 at 720p. A 4-second 480p clip is 19 credits; a 15-second 720p clip is 150 credits. With a reference video, the rate drops to about 2.8/6.0 credits/second at 480p/720p, but the bill covers input-plus-output duration up to a 15-second input cap — a 5-second 720p output built from an 8-second reference clip works out to roughly 78 credits versus 50 credits for the same 5-second output without one.
Fast vs Seedance 2 vs Mini — picking a tier
Fast, Mini, and the flagship share the same 4-15 second duration ladder and six aspect ratios; the difference is resolution ceiling and price. Mini is cheapest and stops at 720p like Fast, but Fast is intended as the direct look-development step for the flagship (settings transfer exactly), while Mini is positioned purely for volume and cost. If you're proving a composition before a 1080p/4K render, use Fast. If you just need the cheapest possible iteration loop and don't plan to move to the flagship, Mini usually costs less.
What creators use Seedance 2 Fast for
- Running several prompt variations at low cost before committing to a full-resolution Seedance 2 or 2.5 render.
- Delivering 720p social cuts directly when the destination platform compresses video anyway.
- Prototyping 21:9 cinema-wide compositions cheaply before a flagship pass.
- Iterating with reference-video mode on motion ideas without the 1080p/4K price tag.
How to use Seedance 2 Fast on VdoBloom
- 1Open the Image to Video tool and select Seedance 2 Fast from the model picker.
- 2Write your prompt — or upload a starting image for image-to-video.
- 3Choose your duration (4–15s), quality (480p/720p), aspect ratio, review the credit cost, and generate.
Frequently asked questions
What does Seedance 2 Fast cost?
Plain generation runs about 4.8 credits/second at 480p and 10 credits/second at 720p — a 5-second 480p clip is 24 credits, a 10-second 720p clip is 100 credits. Reference-video mode is cheaper per second (about 2.8/6.0 credits/second at 480p/720p) but bills input-plus-output duration, capped at 15 input seconds, the same rule that applies across the Seedance 2 family. The exact number for your settings always shows before you generate.
Is Seedance 2 Fast's price a limited-time discount?
No. The per-second rates above are Fast's standard VdoBloom pricing. The on-screen price shown before each generation is always the number that applies.
What's the difference between Seedance 2 Fast and Seedance 2?
Fast keeps the identical 4-15 second duration ladder and all six aspect ratios, including 21:9, but caps resolution at 720p where the flagship reaches 4K. In exchange it costs less per second and returns results faster, which suits drafting and iteration before a full-resolution render.
Will a prompt I develop on Fast work the same on Seedance 2?
Yes — that's the intended workflow, since duration and aspect-ratio options match exactly between the two. A composition proven at 480p or 720p on Fast re-renders at 1080p or 4K on the flagship without changing the prompt or ratio.
Is Seedance 2 Fast censored?
It carries VdoBloom's MODERATE label, the same as Seedance 2 and Seedance 2 Mini. Standard commercial and creative prompts pass; explicit material is declined.
Can I use Seedance 2 Fast for free?
New VdoBloom accounts start with 10 free credits, which doesn't cover a Fast clip on its own (a 4-second 480p run is 19 credits). Top up with a small never-expiring credit pack, or try Seedance 2 Mini first, which starts at 7 credits.
Seedance 2 Fast vs Seedance 2 Mini — which is cheaper?
Mini is cheaper. Mini's 480p rate runs about 1.6 credits/second versus Fast's 4.8, and Mini's 720p rate is about 3.3 credits/second versus Fast's 10. Fast is positioned as a look-development step that matches the flagship's exact settings; Mini is positioned purely as the lowest-cost option for volume work.
Does Seedance 2 Fast support reference video?
Yes, at a lower per-second rate than plain generation, but billed on input-plus-output duration and capped at 15 input seconds — the same mechanic used across the whole Seedance 2 family (see the Seedance 2.5 page for a worked example of how that math plays out).