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Z.ai releases and open-sources its Ox Alpha model as GLM-5.3-Flash, and publishes the model weights for deployment on Hugging Face and inference platforms

Open source release Provisional 78% confidence first seen

Z.ai announced GLM-5.3-Flash, describing it as a hybrid model derived from its earlier Ox Alpha work, and released the corresponding weights and/or code. The company made the model available on Hugging Face and multiple inference platforms, positioning it as significantly cheaper to run and targeting efficient long-context deployment on Chinese AI chips.

GLM-5.3-Flash Z.ai Hugging Face OpenRouter OpenRouter Inc. Ox Alpha SiliconANGLE The New Stack ox-alpha

Source coverage

Z.ai’s GLM-5.3-Flash is cheap, good, and served on Chinese chips The New Stack Z.ai open-sources ‘Ox Alpha’ model as GLM-5.3-Flash SiliconANGLE independent

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