Get ready to take your video creation to the next level! This year is kicking off with some seriously exciting news for anyone passionate about AI-powered video generation. ComfyUI, the popular and flexible node-based interface, now supports Cosmos Making it ComfyUI Cosmos. This exciting update, powered by Nvidia’s cutting-edge Cosmos family of models, changes image to video generation and text to video ComfyUI capabilities. By bringing the latest advancements in Nvidia video model technology to ComfyUI, creators can now enjoy unprecedented control, efficiency, and quality in their AI-driven video projects. In this post, we’ll dive deep into Nvidia Cosmos, how it works, example ComfyUI workflow and how you can leverage it to create stunning videos from text or images. Let’s get started!
Table of contents
- What is ComfyUI and Why Should You Care?
- Unveiling Nvidia Cosmos: A New Era of Video Models
- Key Advantages of Using Nvidia Cosmos in ComfyUI
- Getting Started: Installing and Setting Up Nvidia Cosmos in ComfyUI
- Navigating the Downsides: Understanding the Limitations of Nvidia Cosmos
- Tips and Tricks for Optimizing Your Nvidia Cosmos Video Creations in ComfyUI
- Troubleshooting Common Issues with Nvidia Cosmos in ComfyUI
- The Future of Video Generation: What Does Nvidia Cosmos in ComfyUI Mean?
- Conclusion: Embrace the Power of ComfyUI Cosmos
What is ComfyUI and Why Should You Care?
Think of ComfyUI as a powerful workshop for your creative ideas. It’s a user-friendly tool that lets you connect different “nodes” together to build complex workflows for things like generating images and videos using AI. It’s become a favorite among those who like to fine-tune their creations and have precise control over the process. With its adaptable nature and strong community support, mastering the ComfyUI workflow opens up a world of possibilities for digital artists and video enthusiasts. This new integration of ComfyUI Cosmos enhances the already robust capabilities of the platform.
Unveiling Nvidia Cosmos: A New Era of Video Models
Nvidia has just released their Cosmos family of “World Models,” and they’re seriously impressive. These cutting-edge models are designed specifically for creating videos, and ComfyUI is now harnessing their power! Currently, ComfyUI supports the 7B and 14B versions for both turning text into videos and turning images into videos. This marks a significant advancement in Nvidia video model availability within accessible creative tools.
For most users, the 7B models are going to be the sweet spot. They’re powerful enough to deliver fantastic results, and if you have a graphics card with at least 24GB of memory, they should run smoothly without needing any extra adjustments. Even if you have a 12GB card, ComfyUI’s clever weight offloading feature will let you use these models. This makes exploring the potential of Nvidia Cosmos within ComfyUI accessible to a wider range of creators.
Key Advantages of Using Nvidia Cosmos in ComfyUI
So, what makes this integration so exciting? Let’s dive into the benefits:
One of the biggest wins is the incredible efficiency of the Nvidia Cosmos video VAE (Variational Autoencoder). Think of the VAE as the engine that compresses and decompresses your video data. Nvidia’s version is a game-changer because it uses far less memory than other options, like the one used in the Hunyuan video model. We’re talking about being potentially 50 times more memory efficient! This means you can generate longer, higher-resolution videos, even on less powerful hardware. Imagine creating a 121-frame video at 1280×704 resolution on a 12GB graphics card without any complicated workarounds – that’s the power of this efficient VAE.
Another advantage is that the Cosmos models aren’t “distilled.” This might sound technical, but it basically means that using negative prompts (telling the AI what not to include) works really well. This gives you more control over the final output and makes the models potentially easier to train compared to distilled models.
The image to video generation capabilities are also outstanding. This feature lets you take a single image or a series of images and turn them into a moving video. It’s almost like having an intelligent inpainting tool for video. You can even get creative and generate video sequences that flow from the last frame to the beginning, or create smooth transitions between two different images. Additionally, text to video ComfyUI workflows allow for seamless video creation by providing textual descriptions as input, opening up new creative possibilities for artists and developers.
Finally, if you generate the recommended 121 frames, the model is designed to always create a video with movement. You won’t end up with a still image – it’s built to bring your creations to life.
Plus, Nvidia introduced a new sampler called “res_multistep” for their Cosmos models. The great news is, this sampler is now available in ComfyUI for all your models! Early feedback suggests it also works well with other models like Hunyuan, giving you even more options to experiment with, especially within your ComfyUI workflow.
Getting Started: Installing and Setting Up Nvidia Cosmos in ComfyUI
Ready to jump in? Here’s a simple guide to get you set up:
First, you’ll need to download a few essential files. Don’t worry, it’s straightforward!
- You’ll need the text encoder and VAE files. Download oldt5_xxl_fp8_e4m3fn_scaled.safetensors and place it in your ComfyUI/models/text_encoders/ folder. Then,
- download cosmos_cv8x8x8_1.0.safetensors and put it in ComfyUI/models/vae/. It’s important to note that oldt5_xxl is a specific version (1.0), different from the one used in other models like Flux (version 1.1)
Next, you’ll need the video models themselves. You can find them in the safetensors format here. The key files you’re looking for are Cosmos-1_0-Diffusion-7B-Text2World.safetensors and Cosmos-1_0-Diffusion-7B-Video2World.safetensors. Place these in your ComfyUI/models/diffusion_models folder. Keep in mind that “Text to World” means Text to video, and “Video to World” means image/video to video.
Once you have the files, you can start building workflows.
For text to video ComfyUI workflows, you’ll use the Cosmos-1_0-Diffusion-7B-Text2World.safetensors model. Use this example workflows in the JSON format to get started.

Similarly, for image to video generation, you’ll use the Cosmos-1_0-Diffusion-7B Video2World.safetensors model. This powerful tool allows you to generate videos from one or more images. If you provide multiple images, the model will use them as a guide for the motion. You can even create smooth interpolations by setting a start and end image, especially if they are similar. While trained primarily on realistic videos, it also works surprisingly well with other styles, like anime. Again, Use This example ComfyUI workflow in JSON format to help you begin exploring image to video generation.

Navigating the Downsides: Understanding the Limitations of Nvidia Cosmos
While Nvidia Cosmos is impressive, it’s good to be aware of its current limitations:
The model really prefers generating exactly 121 frames. If you try to generate significantly fewer or more, you might run into issues with the video quality or consistency.
There’s a minimum resolution of 704×704 that the model can handle. You can’t go lower than this.
The model responds best to longer, more descriptive prompts. Short, simple prompts might not give you the results you’re looking for. Think in sentences rather than just a few keywords.
Finally, it’s not the fastest model out there. Generating a 121-frame video at 1280×704 on a high-end RTX 4090 can take over 10 minutes. Think of it as a good way to heat your room during colder months!
Tips and Tricks for Optimizing Your Nvidia Cosmos Video Creations in ComfyUI
To get the best results with Nvidia Cosmos in ComfyUI, try crafting detailed and descriptive prompts. Don’t be afraid to use full sentences to convey your vision. Stick to the recommended 121 frames for optimal results. If processing time is a concern, consider starting with slightly lower resolutions while you experiment. And, as always, exploring different negative prompts can help you refine your video and eliminate unwanted elements within your chosen ComfyUI workflow.
Troubleshooting Common Issues with Nvidia Cosmos in ComfyUI
If you encounter errors during installation, double-check that you’ve placed the files in the correct ComfyUI folders and that the filenames are accurate. For ComfyUI workflow problems, review example workflows online to ensure your node connections are correct. If you’re experiencing performance issues, make sure your GPU drivers are up to date.
The Future of Video Generation: What Does Nvidia Cosmos in ComfyUI Mean?
The integration of Nvidia Cosmos into ComfyUI marks a significant step forward for accessible and high-quality video generation. It puts powerful Nvidia video model technology into the hands of creators, allowing for more intricate control and efficient workflows. As both ComfyUI and Nvidia Cosmos continue to develop, we can expect even more exciting advancements and possibilities in the realm of AI-powered video creation. This integration has the potential to democratize video creation, making it easier for anyone to bring their visual ideas to life, whether through text to video ComfyUI or image-based methods.
Conclusion: Embrace the Power of ComfyUI Cosmos
In conclusion, ComfyUI Cosmos, powered by this new Nvidia video model, enables users utilizing the power of Cosmos in ComfyUI whether you’re exploring innovative image to video generation techniques or diving into creative text to video ComfyUI possibilities, this integration unlocks a new level of potential. Mastering the ComfyUI workflow with Nvidia Cosmos’ efficient technology is an exciting opportunity for creators of all skill levels. The impressive VAE efficiency and powerful creative tools offered by this integration are undeniable. So, download the necessary files, experiment with the workflows, and witness firsthand how ComfyUI Cosmos is revolutionizing video creation!
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