ByteDance’s Seedance 2.5 Flash — a faster, cheaper tier of its Seedance 2.5 video model — opens its API on BytePlus ModelArk today, November 15. Why it matters: at $0.15 a second for 720p, it turns AI video into a cheap draft step you can run many times before paying flagship prices for a final render.
November 15, 2026
What was announced
BytePlus, ByteDance’s international cloud arm, announced Dreamina Seedance 2.5 Flash on November 12. The model comes from ByteDance’s Doubao team and is already selectable inside Dreamina, including its AI Video, AI Canvas and AI Agent tools. The ModelArk API opens November 15 under the model identifier dreamina-seedance-2-5-flash-261115.
BytePlus says Flash produces results close to the flagship Seedance 2.5 at nearly twice the generation speed. Treat both parts of that sentence as company claims for now: no public speed benchmarks, baseline conditions or independent quality measurements accompanied the launch.
The numbers that are confirmed
Flash is priced at $7.0 per million tokens for 480p and 720p, against $10.70 for the flagship. In per-second terms for a typical clip, that is about $0.07 at 480p and $0.15 at 720p, versus $0.103 and $0.231 for standard Seedance 2.5 — roughly a third cheaper at 720p. A five-second 720p clip works out to about $0.76.
The trade-off is resolution and headroom. Flash stops at 720p — there is no 1080p or 4K — and it accepts fewer reference inputs than the flagship, reported as up to 10 images, 5 videos and 5 audio clips per request. Clips run up to 30 seconds, with sound, from text, an image or references.
Why it matters
The useful pattern here is the one language models established with their own Flash tiers: draft cheap, finish expensive. A creator or ad team can test composition, camera movement and timing in Flash for cents, then regenerate only the winning prompts in full Seedance 2.5 at 1080p. That makes unit economics calculable in advance — a real shift for anyone pricing video features into a product.
For subscribers, the honest bottom line is this: the price and the API date are documented on BytePlus’s own pricing pages; the speed and near-flagship quality are not yet independently verified. If you build on Flash today, budget on the confirmed price and judge the quality on your own prompts, not on the launch claim. That is exactly the kind of split — verified fact versus vendor promise — worth keeping in AI video right now.
Frequently asked questions
When does the Seedance 2.5 Flash API open?
November 15, 2026, on BytePlus ModelArk, under the identifier dreamina-seedance-2-5-flash-261115. The model was already available in Dreamina from its November 12 announcement.
How much does Seedance 2.5 Flash cost?
About $0.07 per second at 480p and $0.15 per second at 720p on BytePlus’s published rates — roughly 34% cheaper than flagship Seedance 2.5 at 720p.
Can Flash make 1080p video?
No. Flash is limited to 480p and 720p. 1080p and higher remain flagship Seedance 2.5 territory.
Sources: BytePlus, ByteDance via Dreamina, IT Home