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Zhipu AI announced and released the GLM-5.3 open-source large language model

Open source release Provisional 88% confidence first seen

Zhipu AI debuted GLM-5.3, an open-source LLM described as a post-training upgrade to GLM-5.2 with improvements aimed at long-horizon coding and cybersecurity. Coverage says the model was released with performance results on coding-related benchmarks and that open weights and API access followed shortly after the announcement, alongside planned phased cybersecurity-related releases.

GLM-5.3 Z.ai Zhipu AI GLM-5.2 Hugging Face Hugging Face SiliconANGLE Terminal Bench 3.0

Source coverage

Z.ai debuts GLM-5.3 with long-horizon coding, cybersecurity upgrades SiliconANGLE independent GLM-5.3: How Chinese labs keep stride with the frontier Interconnects newsletter

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