Stable Diffusion 3.5Released
Stability AI has just released its most powerful model yet, Stable Diffusion 3.5, which comes as a complete package with three distinct versions designed to meet diverse needs.
Last updated: October 23, 2025
What You'll Learn
- The 8 Billion Parameter Model and Key Features of Stable Diffusion 3.5 Large
- Speed and Optimization in Stable Diffusion 3.5 Large Turbo
- User-Friendly Capabilities of Stable Diffusion 3.5 Medium
Three Powerful Models
Stable Diffusion 3.5 Large
8B ParametersThis foundational model boasts 8 billion parameters, outperforming competitor models with its swift response time. It stands as the most powerful model in the Stable Diffusion series, making it perfect for professional use cases at resolutions of 1 million pixels.
Stable Diffusion 3.5 Large Turbo
Ultra FastThis model is a distilled version of Stable Diffusion 3.5 Large, generating high-quality images in just four steps, significantly faster than the original while maintaining exceptional quality.
Stable Diffusion 3.5 Medium
2.5B ParametersWith 2.5 billion parameters, this model utilizes an improved MMDiT-X architecture and training methods, offering an out-of-the-box experience on consumer-grade hardware. It achieves a balance between quality and ease of customization, capable of generating images with resolutions ranging from 0.25 to 2 million pixels.
Model Development Insights
In developing these models, Stability AI prioritized customizability to provide a flexible foundation. They integrated Query-Key Normalization into the transformer blocks, stabilizing the training process and simplifying future fine-tuning and development.
To support downstream flexibility, some trade-offs were made. Using different seeds with the same prompt can yield significant output variations, intentionally designed to help maintain a broader knowledge base and diverse styles within the foundational model.
For the Medium version specifically, Stability AI made adjustments to architecture and training protocols to enhance quality, coherence, and multi-resolution generation capabilities.
Key Advantages
Customizability
Easily fine-tune the model to meet specific creative needs or build applications around customized workflows.
Efficient Performance
Optimized to run on standard consumer-grade hardware, particularly for SD 3.5 Medium and Large Turbo models.
Diverse Output
Create images that represent a wide array of backgrounds with minimal prompts, showcasing different skin tones and features.
Stylistic Variety
Capable of generating images in various styles and aesthetics, from 3D to photography, painting, and line art.
Performance Highlights
- SD 3.5 Large leads in prompt adherence while matching the image quality of larger models.
- SD 3.5 Large Turbo offers the fastest inference speed among comparable models, maintaining high image quality.
- SD 3.5 Medium performs better than other medium models, achieving a balance between prompt adherence and image quality.
- All models consider mobile device compatibility for broader accessibility.
Safety & Future Updates
Stability AI has integrated safety and responsible AI practices from the early stages of development for this new version of the model. Additionally, ControlNets will be launched to provide advanced control features for various professional use cases.
Try Stable Diffusion 3.5 Today
Explore the latest models, including the powerful Stable Diffusion 3.5 Large, and experience cutting-edge image generation capabilities.
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