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
- BELL: Open-Source Stack Combines Browserbase, Eve, iMessage and Stripe Link for Personal Agents — jeff_weinstein · 2026-10-27
- Legora runs 2,000 parallel agent evals on Modal Sandboxes for legal AI — blelbach · 2026-10-27
- Two engineers rebuilt a FedEx supplier's billing core in 3.5 months vs an estimated 7-8 — alex_verem · 2026-10-27
- GPT-6.1 Terra scores 48 on AA Coding Agent Index at one-third the cost of GPT-5.6 Terra — ArtificialAnlys · 2026-10-27
- Shift-1 router cuts coding agent spend up to 55% while keeping SWE-bench accuracy — ypatil125 · 2026-10-27
- Non-coder vibe-codes a Godot JRPG with Claude Code in two weeks, music and art synced — ADHDavid · 2026-10-27