Unverified50% confidenceBenchmarkExact time
A UC Berkeley study tested multiple harnesses such as Pi, Codex and Claude Code with seven frontier models and found that on newer, smarter models the choice of harness had no significant effect on SWE-bench Lite scores.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/21/2026
First Seen
Valid until: 1/19/2027
Sources
Is Agent Harness Dead? The Value of Harness as Models Get Stronger
bilibiliMentaline10/20/2026
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