# Meituan Open-Sources Digital Human Video Model LongCat-Video-Avatar 1.5

- Category: Flash (快讯)
- Published: 2026-05-22T11:58:00.000Z
- Source date: 2026-05-22
- HTML: https://www.88z.ai/en/news/flash-20260522-1e298aa6e504e654
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Meituan's LongCat team releases LongCat-Video-Avatar 1.5, significantly improving lip sync and video stability by upgrading the audio encoder, optimizing the data system, and introducing GRPO alignment. The model uses DMD distillation for 8-step generation, boosting efficiency by approximately 15 times, and advancing digital human technology from open-source SOTA to commercial-grade applications.

## At a glance

- Introduces frame-level GRPO alignment and Whisper-large encoder to comprehensively improve lip sync and video stability.
- Uses DMD distillation for 8-step generation, boosting efficiency by approximately 15 times to accelerate commercial adoption.

## The update

Meituan's LongCat team has officially open-sourced the LongCat-Video-Avatar 1.5 digital human video model, marking a transition from open-source state-of-the-art to commercial-grade applications. This upgrade integrates the Whisper-large audio encoder and establishes a high-quality multi-scenario data system. By introducing frame-level GRPO preference alignment, the model achieves comprehensive improvements in lip-sync accuracy, physical plausibility, long-video stability, and multi-person interaction. Furthermore, the model employs DMD distillation to compress the generation process to just 8 steps, increasing efficiency by approximately 15 times. This significantly reduces computational costs and improves response speed, providing strong technical support for the large-scale deployment of digital humans.

## Sources

- [龙猫LongCat](https://mp.weixin.qq.com/s/NcnPZmO9I7dGXRMLy9c7Zw) (2026-05-22)

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