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.
More from coding & agent
- marimo Glance: Turn GitHub Python Code into Live Interactive Notebooks — S_Conradi · 2026-07-22
- Building a Knowledge Graph Without a Graph DB: 1000x Cheaper Than GraphRAG — TheRedfather · 2026-07-22
- FactoryAI gave back its first millions, then shipped Droid CLI two years later — matanSF · 2026-07-22
- Hermes Agent Refactoring Proposal: Decoupling via Event Bus and Monorepo Slicing — Promptmethus · 2026-07-22
- Show HN: a 6.2 MB pure-Go terminal command palette with no fzf dependency — MarinhoD · 2026-07-22
- ty now reads Pydantic config keywords and field metadata — charliermarsh · 2026-07-22