Princeton's i1: A fully open text-to-image model backed by 300 controlled experiments

机器之心 · wechat · 2026-08-23

Princeton University's Zhuang Liu team released i1, a 3B parameter text-to-image model. Backed by 300+ controlled experiments and 700k TPU hours, it uses fully open code and data. i1 outperforms the best previous fully open models by an average of 29.5% on five benchmarks, with excellent text rendering capabilities. Key findings include: large adapters on a single encoder can match multi-encoder setups; long caption training requires prompt rewriters for short prompts; high-res training doesn't need broad data coverage to preserve capabilities.

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