image quality, artistry, and semantic control. We hope PIXART-α will provide new insights to the AIGC community and startups to accelerate building their own high-quality yet low-cost generative models from scratch. You can find the original codebase at PixArt-alpha/PixArt-alpha and all the available checkpoints at PixArt-alpha. Some notes about this pipeline: It uses a Transformer backbone (instead of a UNet) for denoising. As such it has a si