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Beating GPT5.5-xhigh for Coding agent security with SLMs and IRM

Hacker News

Beating GPT5.5-xhigh for Coding agent security with SLMs and IRM

Coding agents craft arbitrary code so securing them is more complicated than red-teaming. We post trained a cyber-security small llm, changed how it reasons and supplemented our controls using program analysis techniques such as inline reference monitoring to outperform GPT5.5-xhigh on hard benchmarks like LinuxArena and SleightBench. Free product available at harden.run and full benchmarks in the blog post.

Visit product View on Hacker NewsAug 27, 2026

Actual performance

9points

5comments

Made the leaderboard

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Incorrect prediction on native model

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