Are you a bit confused by the shift in Stable Diffusion 3.5 (SD3) from traditional diffusion objective to flow matching? You’re not alone!

In this blog, we’ll walk through the core ideas behind flow matching and explain how it’s applied in SD3. Think of this as a high-level summary and hopefully intuitive explanation of two key papers:

  • Scaling Rectified Flow Transformers for High-Resolution Image Synthesis
  • Flow Matching for Generative Modeling

▶️ Open in Colab
📄 View on nbviewer

The Colab link lets you experiment with the notebook live, while the nbviewer version provides a quick read-through.