Zhipu releases GLM-5.3: post-training boosts coding by 50%, security on par with Mythos 5

xiaohu · x · 2026-08-14

Zhipu releases GLM-5.3, with unchanged base model but post-training improvements. Coding ability up 50% in internal evals, cybersecurity on par with Mythos 5, and found 2436 real vulnerabilities in 269 open-source projects.

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