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Z.ai released GLM 5.3 as open-weight frontier AI software and published licensing terms that require larger commercial hosts to undergo a security review.

Open source release Provisional 82% confidence first seen

Z.ai released GLM 5.3 as an open-weight model on Hugging Face after earlier testing and a staged launch, including a referenced internal codename. The accompanying license keeps local use largely unchanged for individuals but adds security-review compliance requirements for companies above a specified revenue threshold when hosting the model for commercial use.

GLM 5.3 GLM-5.3 Z.ai Check Point Software GLM-5.3-Flash Hugging Face OpenAI Ox Alpha The New Stack ox-alpha

Source coverage

GLM 5.3: “Offensive A.I. Systems No Longer Confined to Tightly Controlled Labs” Trending Topics independent Z.ai’s GLM-5.3 goes open weight, but its new license aims at hyperscalers The New Stack

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