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Morning Edition · Saturday, October 3, 2026Published at 2:33 AM EDT · New York
The Same Agent Model Scores 62% in One Harness and 33% in Another
Hugging Face published a multi-harness reinforcement-learning recipe that trains through a traffic-capturing proxy, while a new arXiv study finds pooled cross-harness credit teaches configuration adaptation rather than transferable skill.
A small model scored 62% in the Mini-SWE-Agent harness and 33% in the Claude Code harness, with no training difference between the two runs. That 29-point spread, reported in a Russian-language writeup of Hugging Face's multi-harness guide,…
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Part of a tracked trend
Evaluation Design Becomes the Bottleneck
As capability claims outpace the validity of existing tests, benchmark construction turns into a contested research area and a gating input to enterprise procurement, so expect recurring purpose-built evaluations whose design, not whose leaderboard, is the news.
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