Nine discrete thin rod models are critically compared for their merit for studying the bending response of strands. Four bench marks employed for comparison are two (upper and lower) bounds of bending stiffness and two strand curvatures at slip initiation and completion. The strand configuration chosen, the way in which the lay angle is employed to describe the effective area of cross section as well as moments of inertia of the wire and the components of forces; the inclusion or omission of the wire interaction with the core through friction contact and the moment of inertia of the wire about its own diameter; and of wire couples in part or full are identified as factors that make the difference. Numerical values of the four bench marks for these models are presented.

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