Berkeley Study: Coding Agent Harness Choice Drives Cost More Than Accuracy

Melissa Pan, a PhD student at UC Berkeley's Sky Computing Lab, benchmarked Claude Code, Codex and Pi, finding that the choice of agent harness creates a 'framework tax' that impacts cost even more than accuracy differences.

2026-09-29 ~ 2026-09-29 · 2 related posts

• Berkeley PhD Candidate Compares Claude Code vs Codex vs Pi: Harness Choice Hits Cost More Than Accuracy — arena · 2026-09-29
• Berkeley study reveals the 'harness tax': harness choice impacts coding agent cost more than accuracy — arena · 2026-09-29