Diffusion 1.5.  
Therefore, this kind of model is well suited for usages where efficiency is important. Furthermore, all known extensions
like finetuning, LoRA, ControlNet, IP-Adapter, LCM etc. are possible with this method as well.  
The original codebase can be found at [Stability-AI/StableCascade](https://github.com/Stability-AI/StableCascade).