ByteDance's Seedance 2.5 Leaked: Supports 30s Video Generation

ByteDance's upcoming video generation model, Seedance 2.5, experienced a series of API and demo leaks across multiple channels between July 12 and 13, signaling an imminent release. The most notable improvement is the extension of single-generation video duration to 30 seconds, alongside significant upgrades to multimodal inputs, positioning ByteDance at the forefront of the video generation duration race.

Key Details

According to API information shared by @matchaman11, Seedance 2.5 supports a combination of up to 30 images, 10 videos, and 10 audio clips as inputs, with output video duration increased to 30 seconds. Demos forwarded by @testingcatalog and @legit_api both featured a single-take generation of a "cyberpunk hacker robot working in front of multiple monitors," highlighting the model's ability to produce a 30-second video in one go. @WPHero noted that while this is based on early testing, the model's ability to stably generate 30-second clips demonstrates a solid push toward longer video formats.

Community Reactions

On July 13, @mark_k reported that Seedance 2.5 is "about to be released," framing these leaks as an official preview rather than isolated examples. Although most of the information comes from reposts, the concentrated timeline and mutually corroborating details strongly suggest that ByteDance is gearing up to launch a new version focused on extended video duration and enhanced multimodal capabilities.

2026-07-12 ~ 2026-07-13 · 5 related posts

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