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Z.ai Says Open-Source GLM-5.3 Narrowly Edges Anthropic's Mythos 5 at Finding Software Flaws

2026-08-17 · SourceKrASIA

Z.ai Says Open-Source GLM-5.3 Narrowly Edges Anthropic's Mythos 5 at Finding Software Flaws

Chinese AI company Z.ai published benchmark results claiming its new open-source GLM-5.3 model slightly outperforms Anthropic's restricted Mythos 5 at identifying software vulnerabilities. The company said it will delay the public release by about two weeks for additional safety work and will gate its most sensitive cybersecurity functions behind a verified-user program.

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