[Zhipu: Released GLM-5.3 Model, Performing Better in Complex Coding and Long-Horizon Tasks]

Published: Aug 14, 2026 15:08 (GMT+8)

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Zhipu (02513.HK) announced today that it released GLM-5.3. It uses the same base model as GLM-5.2—all performance gains come from post-training optimization. Compared with GLM-5.2, it performs better on complex coding and long-horizon tasks. GLM-5.3 offers stronger coding capabilities and is currently the most capable open-weight model, delivering 50% better performance than GLM-5.2 on our internal Z.ai code benchmark. In addition, during post-training deployment at scale, the pace of development of its network capabilities exceeded our expectations. On the CyberGym platform, GLM-5.3 leads in vulnerability discovery, with the most significant improvement in the later stages of exploitation chains—on exploitation benchmarks, it performs more than twice as well as GLM-5.2. Once safety evaluation and hardening are complete, we will release the weights two weeks after launch.

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