Claude Mythos Preview
1 article tagged with Claude Mythos Preview
September 30, 2026
analysisAnthropic
Anthropic: Zhipu's Open-Weight GLM-5.3 Nearly Matches Claude Mythos Preview at Building Cyber Exploits
Anthropic's Frontier Red Team reports that Zhipu AI's open-weight GLM-5.3 comes close to Claude Mythos Preview on cyber exploit benchmarks, scoring 50/410 vs 56/410 on ExploitBench. Unlike Mythos Preview, GLM-5.3 shipped without effective safeguards and can be jailbroken with simple prompting tricks or abliteration.