Andy Konwinski(@andykonwinski):"Harness choice has little effect on task success rate ... As models become more capable, agents may need less scaffolding."

2026.09.17 03:47

"Harness choice has little effect on task success rate ... As models become more capable, agents may need less scaffolding."

Melissa Pan@melissapan

2026.09.16 17:39

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 little effect on task success rate, but can significantly affect the cost 2️⃣A simple harness can be competitive 3️⃣The native harness isn’t always the best. Millions of people are using coding agents, but the impact of harness choice remains unclear. (1/n) More details in the thread. 🧵