China’s Z.AI Co., also known as Zhipu, has confirmed that a previously unidentified artificial intelligence model called Ox Alpha is a new iteration of its GLM series, according to a Bloomberg News report. The confirmation came in response to queries from Bloomberg, and the company said it plans to release the model’s weights on the same day the confirmation was made.
According to the report, Ox Alpha had risen to the top of online usage charts prior to Z.AI’s confirmation, drawing attention for its combination of high performance and zero cost to users. The report describes Ox Alpha as a “stealth model,” meaning it appeared and gained traction on usage platforms without its developer being publicly identified beforehand, fueling speculation among observers about its origins.
Bloomberg’s report frames Ox Alpha as a model that rivals DeepSeek, another Chinese AI developer whose models have drawn significant attention for offering strong performance while remaining freely or cheaply available. The comparison points to a broader pattern in China’s AI sector, where multiple companies have released competitive, low-cost or open models that have gained rapid adoption, according to the report.
Z.AI’s decision to release the weights for Ox Alpha means that the underlying parameters of the model will be made publicly available, a move that typically allows outside developers and researchers to run, modify, or build on the model independently rather than relying solely on Z.AI’s own hosted version. The report does not specify further technical details about Ox Alpha’s architecture, training data, or benchmark performance beyond noting its rise in usage and its status as part of the GLM series.
The report does not provide additional detail on why Z.AI initially did not disclose Ox Alpha’s identity, nor does it specify the exact timing of the model’s initial appearance online before the confirmation. Bloomberg’s account is based on the company’s response to its queries, and the report attributes the confirmation and the weight-release plan directly to Z.AI’s statement.
The episode adds Z.AI, or Zhipu, to a list of Chinese AI developers that have produced models capable of competing with better-known rivals while offering free or low-cost access, a dynamic the report ties to DeepSeek’s own emergence as a competitive, cost-efficient AI provider. As with other rapid-adoption AI releases, the report suggests that Ox Alpha’s identification as a GLM-series model may prompt further scrutiny of its capabilities once its weights are publicly available for outside testing and comparison.
Key facts
- Z.AI (Zhipu) confirmed that the Ox Alpha model is a new iteration of its GLM series, per Bloomberg News.
- The confirmation came in response to queries from Bloomberg News.
- Z.AI said it would release the weights for the model.
- Ox Alpha had risen to the top of online usage charts, combining high performance with zero cost.
- The report characterizes Ox Alpha as a model that rivals DeepSeek.