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.

🎬 For a professional AI video-generation product, try Video Ocean — powered by a superior model.

📰 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]
• [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] [report] [demo]
• [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] [code] [vouchers]
• [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] [report] [arxiv]
• [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] [report]
• [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] [blog] [report]
• [2024.03.04] Open-Sora provides training with 46% cost reduction. [blog]

📍 Since Open-Sora is under active development, we remain different branches for different versions. The latest version is main. Old versions include: v1.0, v1.1, v1.2, v1.3.

🎥 Latest Demo

Demos are presented in compressed GIF format for convenience. For original quality samples and their corresponding prompts, please visit our Gallery.

5s 1024×576	5s 576×1024	5s 576×1024

OpenSora 1.3 Demo

| **5s 720×1280** | **5s 720×1280** | **5s 720×1280** | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [](https://streamable.com/e/r0imrp?quality=highest&autoplay=1) | [](https://streamable.com/e/hfvjkh?quality=highest&autoplay=1) | [](https://streamable.com/e/kutmma?quality=highest&autoplay=1) | | [](https://streamable.com/e/osn1la?quality=highest&autoplay=1) | [](https://streamable.com/e/l1pzws?quality=highest&autoplay=1) | [](https://streamable.com/e/2vqari?quality=highest&autoplay=1) | | [](https://streamable.com/e/1in7d6?quality=highest&autoplay=1) | [