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Z.ai confirms it developed the “Ox Alpha” stealth AI model and plans to release the model weights as an open-weight release

Open source release ● Confirmed 86% confidence first seen

Multiple outlets reported that the “Ox Alpha” model listed on OpenRouter had been developed by an anonymous third party, prompting speculation about its origin. Z.ai (formerly Zhipu AI) confirmed it is behind Ox Alpha and said it will release the model weights, making the model available as open weights for developers.

Ox Alpha Z.ai Bloomberg GLM GLM series MAI Microsoft OpenRouter OpenRouter Zhipu AI

Source coverage

Who’s behind the new ‘stealth model’ Ox Alpha? TechCrunch independent Z.AI From China Confirms It Built Ox Alpha, and the Model Is Going Open Weight Trending Topics independent Surprise: Z.ai is the AI lab behind the mysterious Ox Alpha model TechCrunch independent

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