TikTok expands AI video ad length with Dreamina Seedance 2.5 upgrade

TikTok announced that its AI video model Dreamina Seedance 2.5 will be rolled out to advertisers in early August 2026. The upgrade doubles the maximum length of AI‑generated video ads in the TikTok Symphony suite from 15 seconds to 30 seconds, giving brands a larger canvas for more complete narratives.

The new model also raises the limit on multimodal references from nine to fifty, allowing advertisers to supply more images, video clips and audio for higher‑precision generation. Visual quality has been improved, with better understanding of product context, proportions and scene composition. Safety features include AI‑generated content labels, restrictions on unauthorized likeness or intellectual‑property use, and other transparency tools.

The rollout is initially available to select paid advertisers through Symphony Creative Studio, Symphony Automations in TikTok Ads Manager, and the Symphony API. The move comes as competitors such as Snapchat, Meta and Pinterest have recently pulled back on AI‑generated content, positioning TikTok’s expanded offering as a strategic bet on longer‑form AI advertising.