Princeton (Z-Lab) · Text-to-Image

i1

Fully open 3B-param text-to-image diffusion model with transparent design, data and code: dual-stream MMDiT with long skip connections, a single T5Gemma-2B text encoder + 2-block adapter, trained progressively at 256/512/1024 over 700K+ TPU v6e hours on 12 public datasets with Qwen3-VL synthetic captions. Beats the best prior fully-open model by 29.5 absolute points avg across five benchmarks.