Zhipu AI releases GLM-5.3, claims it's the strongest open-weights coding model

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Zhipu AI has released GLM-5.3, a model that, according to its own benchmarks, is the most powerful open-weights coding model, with a 50 percent improvement over its predecessor through post-training alone.

Trained for cybersecurity, GLM-5.3 helped security teams find 2,436 vulnerabilities across 269 projects.

The model weights are set to go open source in two weeks.

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