Key Features

3B-parameter text-to-image diffusion model trained with an open recipe.
Targets competitive 1024-resolution image generation against leading open-weight models.
Studies modeling choices through controlled experiments.
Analyzes text conditioning, noise conditioning, and backbone architecture decisions.
Studies data choices including synthetic captions, prompt rewriting, and dataset mixing.
Reports evaluation across GenEval, DPG-Bench, PRISM, CVTG-2K, and LongText-Bench.
Releases model, code, and data according to the project page.
Useful as both a model and a research recipe for text-to-image training.

The project studies model design, text and noise conditioning, backbone architecture, synthetic captions, prompt rewriting, dataset mixing, and training/evaluation choices. It positions openness as a core contribution by releasing the model, code, and data to support controlled follow-up research.


i1 is useful for researchers who want to understand which concrete design choices move text-to-image quality rather than only use a finished model. The project page links to paper, code, model, and data resources.

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