ByteDance Launches Seedance 2.5 Flash: Twice the Speed at About ¥0.99 per Second

What happened

Seedance 2.5 Flash rolled out from Nov 12 on Jimeng, LibTV, Updream, Creao AI, TapNow and other platforms; the Volcano Ark API opens Nov 15 at 14:00 Beijing time under the model ID dreamina-seedance-2-5-flash-261115, with BytePlus ModelArk opening the same day. Runway's developer pages also listed the model on Nov 13.

On pricing, 720p text-to-video and image-to-video cost about ¥0.99 per second, the same as Seedance 2.0 and roughly 34% below Seedance 2.5; a 10-second clip costs about ¥9.9. BytePlus ModelArk prices the model at US$7.0 per million tokens for 480p and 720p, against US$10.70 for the flagship Seedance 2.5. The model offers only 480p and 720p tiers, with no 1080p or 4K option.

On specifications, a single clip runs up to 30 seconds, with up to 10 images, 5 video clips and 5 audio clips as references. ByteDance describes the quality as closest to the flagship and better than 2.0 — the vendor's own characterization, with no independent testing published — and the "twice as fast" claim carries no published measurement data; the Volcano Ark pricing page did not list itemized prices for this release.

Positioning

Seedance 2.5 Flash splits the line in two: the flagship Seedance 2.5 stays the choice for the highest quality, handling 1080p and 4K work with a draft mode that lets a user approve a cheap preview before paying for the final render, while Flash targets high-volume production with near-flagship quality at roughly two-thirds of the price for 720p and below.

The flagship Seedance 2.5 arrived in the middle of the year with 30-second single generations and multimodal references. ByteDance published no benchmarks for Flash and did not say whether 1080p pricing will change, so the price comparison holds only at the resolutions the company quoted.

Key facts

1. Launch: Volcano Engine released Seedance 2.5 Flash on Nov 12; the Volcano Ark API opens Nov 15 at 14:00 Beijing time
2. Speed: ByteDance says generation runs about twice as fast as the flagship Seedance 2.5, with no published measurement data
3. Pricing: 720p text-to-video and image-to-video at about ¥0.99 per second, roughly 34% below the flagship; ModelArk charges US$7.0 per million tokens, against US$10.70 for the flagship
4. Specs: Clips run up to 30 seconds, with up to 10 images, 5 video clips and 5 audio clips as references; only 480p and 720p tiers
5. Rollout: Jimeng, LibTV, Updream, Creao AI and TapNow from Nov 12; Runway listed the model on Nov 13
6. Positioning: The flagship still handles 1080p and 4K with a draft mode; Flash targets high-volume production