# 字节跳动7月初发布Seedance 2.5视频生成模型，生成长度翻倍至30秒

- 来源：Deedy (@deedydas)
- 发布时间：2026-06-27 22:00
- AIHOT 分数：34
- AIHOT 链接：https://aihot.virxact.com/items/cmqwgh3rh00bfsly0yjhyey98
- 原文链接：https://x.com/deedydas/status/2070869860314476977

## AI 摘要

字节跳动将于7月初发布视频生成模型Seedance 2.5，将生成长度从15秒翻倍至30秒，支持音频+4K视频；参考图片/音频/视频数量提升至50个以上；支持局部编辑（特定角色、闭合、细节），附带版权过滤。其前代Seedance 2已是视频生成模型第一名，ARR达20亿美元，定价$2.5/15秒，累计生成超330万小时视频。对比时间线：Veo 3（2025年5月）首降音视频生成15秒，Kling 3（2026年1月）15秒，Seedance 2（2026年2月）15秒，Seedance 2.5（2026年7月）30秒。中国视频模型持续扩大对美国的领先优势。

## 正文

Bytedance is dropping the best video gen model in the world in early July： Seedance 2.5！

The video below （audio on） is the launch video from their Volcano Engine conference this week. It cements China's absolute dominance in video.

- 2x'd generation length of all previous models to 30s， with audio + 4k video
- >5x'd reference images / audio / video to 50
- Allows localized editing （specific characters， closing， detail）， will come with copyright filter

Seedance 2 is already the #1 video model and does a whopping $2B in ARR， in a mere 4.5mos！ At the current pricing of $2.5/15s， that implies >3.3M hours of video （！） have been generated. That's 3x every feature film ever made and dozens of Netflixes. Only 3 US AI startups make more revenue.

We are 2x'ing realistic video gen length every 6mos.
- May 2025： Veo 3 does audio + video for the first time， 15s
- Jan 2026： Kling 3 does 15s
- Feb 2026： Seedance 2 does 15s， big quality bump
- July 2026： 2.5 will do 30s
In 18mos， entire music videos will be oneshotted by AI.

China continues to extend its lead on video models vs America.