Testing Gemini 3.5 Flash Cyber: Low-Cost Agent Beats Larger Models on CyberGym
xennygrimmato_ · x · 2026-07-21
The author tested Google's newly released Gemini 3.5 Flash Cyber model. In the CyberGym benchmark, which evaluates agents against real-world software vulnerabilities, the model demonstrated exceptional cost-effectiveness.
By configuring the CodeMender tool to allow the lightweight 3.5 Flash Cyber up to five iterative calls for a final report, the overall agent achieved competitive performance against significantly larger models.
The author notes that finding deep-seated flaws requires exploring an immense execution search space. Relying on a single, expensive call to a massive model creates a bottleneck, whereas 3.5 Flash Cyber is particularly suitable for scanning large codebases and analyzing numerous codepaths.
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