Unverified50% confidenceFactExact time
When the same model is run on the Terminal Bench dataset on different Harnesses, the results differ, and models released by vendors are often tuned for a specific Harness.
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50%
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Long-term
Relevance
10/31/2026
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Related Claims
UnverifiedThe performance difference of the same model across different tools stems from gaps in the Harness engineering system—the model determines the lower bound of capability, while Harness determines the upper bound.73% similarUnverifiedThe harness loop includes Reefine, SkillClaw, GEPA, and Meta-Harness, which propose modifications to the harness's own files and compare scores against the current version, with the default selection strategy being to retain changes only upon a "net win".63% similarUnverifiedThe behavioral shifts caused by swapping harness components are partially additive (approximately compositional), but the accuracy varies by component and environment.62% similarUnverifiedThe difference between a harness and a unit testing framework is that a harness focuses more on the runtime environment than on assertion libraries, and often needs to be deeply coupled with the framework under test to be effective.62% similar
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