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Z.ai introduces GLM-5.3 for coding and cyber defense

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Z.ai announces GLM-5.3, which it says delivers top-tier coding and agentic capabilities through post-training on a 743B base model. The company also says GLM-5.3 sets a new standard among open models for cybersecurity. Further details are in the company's tech blog.

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The chart compares GLM-5.3 with GLM-5.2, Kimi K3, and two closed models across nine benchmarks, showing where gains concentrate.

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Introducing GLM-5.3: Built to Code. Ready for Cyber Defense.

  • Top-tier coding and agentic capabilities, achieved through post-training on the 743B base model
  • A major leap in cybersecurity, setting a new standard among open models

Tech Blog: https://z.ai/blog/glm-5.3

Source: Z.ai · x.comPublished · added here

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Zhipu GLM (Z.ai)AI codingOpen-source ecosystemSafety & alignmentChina AIModel releases