Anthropic Says Zhipu Open-Source Model GLM-5.3's Exploitation Capability Approaches Claude Mythos Preview
Anthropic releases an assessment stating that Zhipu's open-source model GLM-5.3 has exploit capabilities close to Claude Mythos Preview; out of 410 attempts on ExploitBench, GLM-5.3 successfully built usable exploits 50 times, while Mythos Preview did so 56 times.
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