Do models need their native harness for coding? Awesome work from our intern @melissapan on this. She dug into whether the harness (Claude Code vs Codex CLI vs Pi) actually moves the needle for coding agents.
Turns out it matters way less than people assume. 21 model-harness pairs, real rigor. More from Arena to come.
More details on the Arena blog: https://arena.ai/blog/coding-agents-harness-tax
Does your Claude model really need Claude Code…? 🤔 We evaluate 7 models on Claude Code, Codex, and Pi. Three surprising findings emerge: 1️⃣Harness choice has ...