ByteDance unveiled Seedance 2.5 at the FORCE 2026 conference on June 23, 2026, a video model that makes a 30-second 4K video from a single prompt. It takes up to 50 reference materials across image, video, audio, and 3D to hold characters and backgrounds consistent. ASAP summarizes the announcement from the primary source.

One prompt, 30 seconds of native 4K

Seedance 2.5 is a model that generates a 30-second native 4K video from a single prompt. The length doubles from the 15 seconds of 2.0, and the resolution is native 4K. The output is closer to a short film than a short clip.

50 reference materials hold consistency

Seedance 2.5 is able to take up to 50 reference materials across image, video, audio, and 3D white-box inputs. These references sharply raise prompt adherence and control over character and background consistency. Bundling many materials lets a creator specify the target scene more precisely.

Three world-firsts

The three world-firsts are 30-second length, 50 reference materials, and flexible local video editing in Seedance 2.5. It adds multi-shot storytelling, director-grade camera control, and native audio sync. It also provides an industry-first 3D white-box preview.

Launch: skipping 2.1 for 2.5

ByteDance skipped 2.1 and went straight to 2.5, with an early-July launch announced. The model is in beta now and is reachable through Dreamina or the Volcano Engine API. The demo footage shown on stage was itself generated by Seedance 2.5.

What it means: AI video moves from clip to short film

Seedance 2.5 is a shift in the unit of AI video from one shot to a 30-second piece. When 30 seconds, 4K, multi-shot, and audio sync all arrive together, generating a whole ad or short becomes practical. The competition in AI video shifts from resolution to length, consistency, and control.

Wrap-up

ByteDance unveiled Seedance 2.5 at FORCE 2026, a model that makes a 30-second 4K video from one prompt. The core points are 30-second native 4K, 50 reference materials, three world-firsts, and an early-July launch. AI video is moving from a single clip to a short film.

Source: ASAP summary of the ByteDance Seedance 2.5 announcement (Volcano Engine FORCE 2026 conference, June 23, 2026; one-prompt 30-second native 4K, 50 reference materials, three world-firsts of 30-second length, 50 references, and local video editing, multi-shot and director-grade camera and native audio sync, a 3D white-box preview, an early-July launch, access via Dreamina and the Volcano Engine API).