README

Open-Sora: Democratizing Efficient Video Production for All

We design and implement Open-Sora, an initiative dedicated to efficiently producing high-quality video. We hope to make the model,
tools and all details accessible to all. By embracing open-source principles,
Open-Sora not only democratizes access to advanced video generation techniques, but also offers a
streamlined and user-friendly platform that simplifies the complexities of video generation.
With Open-Sora, our goal is to foster innovation, creativity, and inclusivity within the field of content creation.

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 📰 News

- [2025.03.12] 🔥 We released Open-Sora 2.0 (11B). 🎬 11B model achieves on-par performance with 11B HunyuanVideo & 30B Step-Video on 📐VBench & 📊Human Preference. 🛠️ Fully open-source: checkpoints and training codes for training with only $200K. [[report]](https://arxiv.org/abs/2503.09642v1)
- [2025.02.20] 🔥 We released Open-Sora 1.3 (1B). With the upgraded VAE and Transformer architecture, the quality of our generated videos has been greatly improved 🚀. [[checkpoints]](open-sora-13-model-weights) [[report]](/docs/report_04.md) [[demo]](https://huggingface.co/spaces/hpcai-tech/open-sora)
- [2024.12.23] The development cost of video generation models has saved by 50%! Open-source solutions are now available with H200 GPU vouchers. [[blog]](https://company.hpc-ai.com/blog/the-development-cost-of-video-generation-models-has-saved-by-50-open-source-solutions-are-now-available-with-h200-gpu-vouchers) [[code]](https://github.com/hpcaitech/Open-Sora/blob/main/scripts/train.py) [[vouchers]](https://colossalai.org/zh-Hans/docs/get_started/bonus/)
- [2024.06.17] We released Open-Sora 1.2, which includes 3D-VAE, rectified flow, and score condition. The video quality is greatly improved. [[checkpoints]](open-sora-12-model-weights) [[report]](/docs/report_03.md) [[arxiv]](https://arxiv.org/abs/2412.20404)
- [2024.04.25] 🤗 We released the Gradio demo for Open-Sora on Hugging Face Spaces.
- [2024.04.25] We released Open-Sora 1.1, which supports 2s~15s, 144p to 720p, any aspect ratio text-to-image, text-to-video, image-to-video, video-to-video, infinite time generation. In addition, a full video processing pipeline is released. [[checkpoints]](open-sora-11-model-weights) [[report]](/docs/report_02.md)
- [2024.03.18] We released Open-Sora 1.0, a fully open-source project for video generation.
  Open-Sora 1.0 supports a full pipeline of video data preprocessing, training with
  
  acceleration,
  inference, and more. Our model can produce 2s 512x512 videos with only 3 days training. [[checkpoints]](open-sora-10-model-weights)
  [[blog]](https://hpc-ai.com/blog/open-sora-v1.0) [[report]](/docs/report_01.md)
- [2024.03.04] Open-Sora provides training with 46% cost reduction.
  [[blog]](https://hpc-ai.com/blog/open-sora)

📍 Since Open-Sora is under act