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Only organizations with more than $10 billion in annual revenue need a security review under Z.ai’s GLM-5.3 license, and only when they offer the model as an external model service. Z.ai said GLM-5.3 is available for download, local deployment, fine-tuning and commercial use. The company said it spent two additional weeks on safety evaluations before publishing the weights because of the model’s advanced cybersecurity capabilities.
GLM-5.3 is the largest model in the GLM-5.3 line, with 744B total parameters, 40B active parameters, a 1M context window and 128K max output. The weights were live on Hugging Face, and vLLM, SGLang and OpenRouter said they had day-0 support or availability after the release.
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Key sources
- SOURCE@zai_org“Our most capable model for agentic coding and cyber defense”x.com
- SOURCE@zixuanli_“a security review is required only when an organization with more than $10 billion in annual revenue offers GLM-5.3 as an external model service.”x.com
- SUPPORT@vllm_project“744B total, 40B active, 1M context, 128K max output.”x.com
- SUPPORT@sgl_project“On real-world multi-turn agentic workloads, we measured 537.6 tok/s/user on NVFP4 and 413 tok/s/user on FP8”x.com
- SUPPORT@kimmonismus“FP8: 10–12× H100 or 8× H200”x.com
- SUPPORT@openrouter“Built for complex software engineering, long-horizon agents, and cybersecurity, with 1M context and configurable reasoning effort.”x.com
- SOURCE@ollama“Private. Fast. US and Europe hosted. No data retention.”x.com
- SUPPORT@baseten“The smartest open-weight model at 743B params”x.com