02 — Why ByteDance
Each block carries its strongest available evidence, the commercial argument it supports, and the limit we would raise ourselves in the first meeting.
Seedance 2.5 generates a take of up to 30 seconds in a single pass at 24 fps, with 480p to 1080p output and audio produced in the same call. Seedance 2.0 added native 4K and 10-bit colour. For automotive work that is the difference between generating fragments to be assembled later and generating a shot that can be cut into a launch film as it stands.
Independent measurement supports the claim in the form it can actually be supported: top group, not undisputed leader. Blind-vote arenas placed Seedance 2.5 joint 4th in text-to-video and joint 2nd in image-to-video on 30 September 2026, and first on the Sprites Creative Arena board on 2 October 2026. Seedance 2.0 held first place on Arena.ai for both text- and image-to-video as of 8 April 2026.
A prompt describes; a reference constrains. Seedance 2.5 accepts up to 50 reference assets per request — 30 images, 10 video clips and 10 audio clips — including clay renders for blocking, camera-path references for movement and motion clips for rhythm. Subject, scene, shot size and camera language become inputs rather than adjectives.
In practice this is what separates a creative tool from a slot machine: the brand's own CGI, the actual vehicle and the approved location drive the first frame, so the argument in review is about the edit rather than about whether the car looks like the car.
Continuity is where generative video breaks in front of clients: a badge changes spelling between shots, a jacket changes cut, a face drifts. Reference-conditioned generation holds a subject across generations; Seedance 2.x extends an existing shot while preserving character, scene and style; Seedance 1.0 pro offered native multi-shot narrative.
The limit is real and worth stating first: fast multi-body interaction, unusual physics and small embossed brand detail still need a human pass. This programme keeps its own failure case on the site — a tailgate badge that rendered as ‘iX350L’ — next to the region-level repair that fixed it.
Rejecting a whole take to fix two seconds is the hidden cost of AI video. Seedance 2.x supports timestamp-level instruction and region-level editing inside a generated shot; Seedance 2.5 adds video extension. Seedream 5.0 pro applies the same logic to stills: coordinate and region editing, plus decomposition of a flat image into a base layer and up to 16 editable layers.
Commercially this converts a review note into a short task instead of a new production day, which is the single most requested capability from teams that already run AI video at volume.
European campaigns are localisation exercises with a film attached. Seedance 2.5 accepts prompts in more than ten languages and produces lip-synced dialogue, with audio accepted as a reference or as the only input. Seedance 1.5 pro covers English, Spanish, Japanese, Korean and Indonesian speech plus Chinese dialects. Seedream 5.0 pro renders in-image text across 14 languages.
That last point is the one procurement teams underestimate: in-image text is what decides whether a packshot, a plate or an end-card can be reused in Germany, France and Poland without a re-typeset in a DTP queue.
The stack is only useful if it can be called. ModelArk exposes these models over an asynchronous API with callback URLs, per-model rate limits in RPM and concurrency, a return_last_frame option for stitching, and execution expiry controls. Python, Java and Go SDKs are published and the interface follows an OpenAI-compatible shape, which shortens integration from weeks to days.
Regional endpoints include EU West (Frankfurt). Not every model is available in every region — that has to be checked model by model, and we do not claim otherwise anywhere on this site.
Claims policy
The fastest way to lose a technical audience is to over-claim once. These are the statements we deliberately do not make.
Not “the best video model on the market.” Independent arenas put Seedance in the top group, not always at the top, and the margin between the first four places is smaller than the noise on those boards.
Not “GDPR certified.” BytePlus publishes its compliance and data-processing position. The contractual answer depends on region, model and agreement, so it belongs in a DPA conversation, not on a poster.
Not a percentage saving. No vendor-neutral measurement exists that we could defend in a procurement review, so we publish a pilot scorecard instead.
Not a model version we cannot see. Where the source does not state which model produced a film, the card says so.
Start here
If you have ten minutes, take the evidence register. If you have a campaign, take the pilot scope.
Seventeen titles, each labelled with provenance, input and the capability it demonstrates.
Open the showcase ↗Bring a real brief — a launch, a localisation wave, a stack of end-cards — and we will cost it honestly.
Enterprise contact ↗Three weeks, a defined reference pack, and a scoring rubric agreed before the first generation.
Scope a pilot ↗