01.AI (零一万物) is a Chinese artificial intelligence company founded in 2023 by Kai-Fu Lee, the venture capitalist and former Google China president. The company rose to prominence by releasing the Yi series of open-weight large language models, which competed with leading open models on multilingual and reasoning benchmarks and earned 01.AI a place among China's so-called "Six AI Tigers." The company reached unicorn status shortly after launch, raising roughly $200 million in a Series A round announced in November 2023.
The Yi model family was distributed openly through platforms such as Hugging Face, supporting both Chinese and English use cases, and 01.AI also built consumer products including the productivity assistant Wanzhi. The open-weight strategy positioned the company as an alternative to closed frontier-model providers and gave enterprises a self-hostable option for Chinese-language workloads.
In early 2025, Kai-Fu Lee publicly restructured 01.AI's strategy. Rather than continuing to train its own frontier-scale foundation models, the company shifted toward building enterprise AI applications and agents, leaning on third-party open-source models for underlying intelligence. Most of 01.AI's pre-training and infrastructure team transitioned into a joint large-model lab with Alibaba Cloud, while 01.AI focused on lighter models and revenue-generating applications.
The revised approach prioritizes commercialization and sustainable revenue over raw user growth or AGI ambitions. Lee has framed the pivot as a pragmatic response to the economics of frontier-model training and the rise of capable open-source alternatives, with 01.AI targeting verticals such as finance and gaming and projecting meaningful 2025 revenue growth.
Prospective users should note that 01.AI is a China-headquartered company whose product roadmap has shifted significantly since its founding. Organizations evaluating it should verify which models and applications are currently supported and consider data-residency and regulatory factors relevant to Chinese AI providers.