01.AI
The Chinese firm behind the open-weight Yi models
China Frontier lab Open weights
WHAT IT IS
01.AI was founded in 2023 by Kai-Fu Lee. It ships the Yi language models and releases several parameter sizes as open weights for research and commercial use.
Why it matters
The Yi family entered the market with open weights, becoming one of the early forces in Chinese open-weight models.
Key milestones
- 2023
Founded and released the Yi family