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GLM-5.3 frontier coding model release
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Z.ai released GLM-5.3 on August 14, 2026, a frontier coding model built by scaling post-training on the unchanged 743B GLM-5.2 base. The model shows substantial gains on code and long-horizon reasoning tasks, with Terminal-Bench 3.0 jumping from 4.6 to 28.3 and cybersecurity benchmarks more than doubling.
- Terminal-Bench 3.0: 4.6 → 28.3; DeepSWE v1.1: 46.2 → 66.9
- CyberGym reached 84.5%; ExploitBench more than doubled to 54.4%
- Reuses 743B GLM-5.2 base model without retraining
- Weights available in approximately two weeks
- Gains driven entirely by scaled post-training across more task environments and longer training
[HN]hacker news4
GLM-5.3 – The Official Desktop Auditor for Z.AI's Cyber-Engine
Preparing GLM-5.3 for Open Release: A Responsible Path to Cyber Defense
GLM-5.3: How Chinese labs keep stride with the frontier
GLM-5.3: Frontier coding with emergent cyber capabilities