Z.ai GLM-5.3 security draws scrutiny as Anthropic flags weak defenses

DIGITIMESOctober 5, 2026en

Anthropic has warned that GLM-5.3, the latest model from Chinese AI startup Z.ai, approached Claude Mythos Preview on an exploit-development benchmark but lacks sufficient safety protections, raising concerns that malicious actors could use it for cyberattacks.

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