Z.ai introduces GLM-5.3 coding and cyber defense model
Z.ai post-trained GLM-5.3 on its 743B base model; it is available now via GLM Coding Plan and ZCode, with API and open weights later.
- Z.ai calls GLM-5.3 a major cybersecurity leap that sets a new standard among open models.
- It delivers a dramatic improvement over GLM-5.2, with better results using fewer output tokens.
- API access and open weights will be released in stages after safety evaluations.
- An initial group of partners already offers GLM-5.3-powered services through Z.ai's official service.
Developers and security teams can now adopt GLM-5.3 for agentic coding and cyber defense through Z.ai's products, while open weights remain pending safety review.
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