We ran a set of popular open-source models against our IDOR benchmark, the same dataset and the same prompt we've used to evaluate frontier coding agents. The result surprised us: GLM 5.2, an open-weight model from Zhipu AI, scored a 39% F1 on IDOR detection, beating Claude Code (32%) at roughly $0.17 per vulnerability found. It still trailed Semgrep's multimodal pipeline (53–61% F1), but that pip...