simonwillison.netarticleQuoting Anthropic Frontier Red Team
Simon Willison quotes Anthropic's Frontier Red Team report "GLM-5.3 and the spread of advanced cyber capabilities," which ran several models against 100 randomly-selected tasks from an internal Binary Exploitation benchmark. GLM-5.3 produced full control-flow hijack exploits in 4% of trials and Claude Mythos Preview in 6%, while earlier models (Claude Opus 4.6, GLM-5.2) succeeded in none — marking what Anthropic frames as a newly crossed capability threshold for AI-assisted exploit development.
TL;DR Anthropic's Frontier Red Team reports GLM-5.3 and Claude Mythos Preview newly capable of generating full control-flow hijack exploits on a binary exploitation benchmark, unlike prior model generations.
Also seen from another angle🧠 AI →
Organisations named here
Technologies named here
- GLM-5.3
- internal Binary Exploitation benchmark
- Claude Mythos Preview
- Claude Opus 4.6
- GLM 5.2
- GLM
- Claude
- Opus 4.6
Techniques named here
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