arXiv AI By Arsham Gholamzadeh Khoee, Ruyu Fu, Jiaqi Wei, Ruikun Deng, Robert Feldt, Dhasarathy Parthasarathy, Yinan Yu

Build or Adopt? Custom-Built vs. General-Purpose LLM Agent Harnesses for Automotive GUI Testing

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The study compares a custom-built LLM agent harness with two general-purpose harnesses—Claude Code and OpenCode—used for testing Volvo Group’s Android-based in‑vehicle infotainment GUI. On Volvo’s stepwise IVI tests, the general-purpose harnesses achieve similar success rates but with higher inference costs, yet they reduce overall monthly costs by 3–66% due to lower engineering effort. In open‑ended public‑app tasks, the general-purpose harnesses perform better, recovering more effectively from incorrect actions.

Machine-generated by The Flow from the publisher's headline and feed description — not written or checked by a human. The full article lives at arXiv AI.

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