Zhipu, listed as 02513.HK, said on Aug. 14 that it has released GLM-5.3. The company said the new model uses the same base model as GLM-5.2, with all performance improvements coming from post-training optimization rather than changes to the underlying foundation.
According to Zhipu, GLM-5.3 performs better than GLM-5.2 on complex coding and long-horizon tasks. The company also described it as the most capable open-weight model currently available in terms of functionality. In Zhipu’s internal Z.ai coding benchmark, GLM-5.3 posted a 50% performance improvement over GLM-5.2.
Zhipu added that during large-scale deployment after training, the model’s network capability developed faster than expected. On the CyberGym platform, GLM-5.3 ranked at the front in vulnerability discovery, with the biggest gains showing up in the later stages of exploit chains. In exploit benchmark tests, its performance was more than double that of GLM-5.2. The company said it plans to publish the model weights two weeks after release, pending completion of safety evaluation and reinforcement work.
BlockBeats reported on Aug. 14 that Zhipu (02513.HK) has released GLM-5.3.
Zhipu said GLM-5.3 uses the same base model as GLM-5.2, and that all performance gains came from post-training optimization. Compared with GLM-5.2, the new version showed stronger results in complex coding and long-horizon tasks.
The company said GLM-5.3 has stronger coding capability and described it as the most capable open-weight model available in terms of functionality. In Zhipu’s internal Z.ai coding benchmark, GLM-5.3 improved performance by 50% over GLM-5.2.
Zhipu also said that during scaled deployment after training, the model’s network capability developed faster than expected. On the CyberGym platform, GLM-5.3 led in vulnerability discovery, with the largest improvement appearing in the later stages of exploit chains. In exploit benchmark testing, its performance was more than twice that of GLM-5.2.
The company said it will publish the weights two weeks after release after completing safety evaluation and reinforcement work.
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