Z.ai revealed that mystery AI model Ox Alpha was GLM-5.3-Flash, which it had anonymously tested on OpenRouter and OpenCode.
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Huileng Tan
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Z.ai chairman and cofounder Liu Debing marks the company's debut on the Hong Kong Stock Exchange in January 2026.
Z.ai reveals Ox Alpha was GLM-5.3-Flash, built on Chinese chips
Ox Alpha: A powerful, mysterious AI model no one will admit to making
Ox Alpha answers on Taiwan and shuts down on Xi
Surprise: Z.ai is the AI lab behind the mysterious Ox Alpha model | TechCrunch
GLM-5.3-Flash: Z.ai Reveals Ox Alpha Was Its Open Multimodal Model
Who's behind the new ‘stealth model’ Ox Alpha? | TechCrunch
I Tried the Mysterious Ox Alpha Model. Then I Fell Down the Rabbit Hole of Who Actually Made It.
Z.ai open-sources ‘Ox Alpha’ model as GLM-5.3-Flash - SiliconANGLE
Viral Sensation Ox Alpha Model Revealed As GLM-5.3-Flash, Running Entirely On Chinese Chips
Mystery AI model Ox Alpha draws developers with free access
