Mystery solved: Chinese lab Z.ai says it’s behind the Ox Alpha model that wowed Silicon Valley

Business Insider | 26-08-2026 06:45pm |

Chinese AI company Z.ai, also known as Zhipu, has revealed that it is the creator of the mysterious Ox Alpha model that impressed Silicon Valley. The model, an anonymous preview of GLM-5.3-Flash, was tested on OpenRouter and OpenCode to gather feedback. Z.ai has made the model's weights publicly available, and it supports text, images, and video with a context window of up to 1 million tokens.

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