# TechNode — Z.ai launches GLM-5.3 with claimed 50% gain on coding benchmark

- Company: TechNode (technode.com)
- Announced: 2026-08-17T05:58:14+00:00
- Category: model-update
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://technode.com/2026/08/17/z-ai-launches-glm-5-3-with-claimed-50-gain-on-coding-benchmark/
- Record: https://forck.live/items/5148-z-ai-launches-glm-5-3-with-claimed-50-gain-on-coding-benchmark
- Subject: Reporting
- Open weights: yes
- Models affected: GLM-5.3, GLM-5.2

Z.ai launched GLM-5.3, an update focused on coding, long-horizon tasks and cybersecurity. The model uses the same base model as GLM-5.2, with gains attributed to post-training. Z.ai reported a 50% higher score on its internal Z.ai Code Bench and leading open-source results on Terminal-Bench 3.0 and Agents’ Last Exam, and stated the model weights will be released two weeks after launch following additional safety evaluation.

## Evidence

Verbatim from https://technode.com/2026/08/17/z-ai-launches-glm-5-3-with-claimed-50-gain-on-coding-benchmark/:

> Z.ai, the international brand of Chinese AI company Zhipu, has launched GLM-5.3, an update focused on coding, long-horizon tasks and cybersecurity. The model uses the same base model as GLM-5.2, with the company attributing the latest gains to post-training. Z.ai said GLM-5.3 scored 50% higher than GLM-5.2 on its internal Z.ai Code Bench and reached leading open-source results on Terminal-Bench 3.0 and Agents’ Last Exam. It also reported stronger vulnerability-discovery and exploitation performance, and said the model weights will be released two weeks after launch following additional safety evaluation.

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Record: https://forck.live/items/5148-z-ai-launches-glm-5-3-with-claimed-50-gain-on-coding-benchmark
Catalogue: https://forck.live/llms.txt
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