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Zhipu AI release of GLM-5.3 model
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2026-08-16 15:16 UTC → 2026-08-17 01:39 UTC ·
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Zhipu AI release of GLM-5. 3 GLM-5.3 model
Zhipu AI (also referred to as Z. ai) has released GLM-5. 3, GLM-5.3, a large language model optimized for programming and cybersecurity. Although the model utilizes the same 743-billion-parameter Mixture of Experts base as GLM-5. 2, GLM-5.2, it achieves performance gains through expanded post-training scaling. In technical benchmarks, the model shows a 50% improvement in coding tasks and an 84.5% success rate in CyberGym cybersecurity testing, surpassing competitors such as Anthropic’s Mythos 5 and OpenAI’s GPT-5. 6 Sol. The model features a 1 million token context window and is designed for long-horizon tasks and agentic capabilities, including tool calling via MCP. GLM-5. 3 While GLM-5.3 shows strength in vulnerability detection, outperforming Mythos 5’s 83.8% with its 84.5% score, it trails Western competitors in offensive capabilities. In the Exploit Bench test, which measures the ability to convert vulnerabilities into functional attacks, GLM-5.3 scored 54.4% compared to Mythos 5’s 78.0%. GLM-5.3 is currently accessible via API, the GLM Coding Plan, and ZCode. The company intends to release the full model weights to the public following safety evaluations and hardening processes.
Versions
- 2026-08-17 01:39 UTC Zhipu AI release of GLM-5.3 model
- 2026-08-16 15:16 UTC Zhipu AI release of GLM-5. 3 model
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