mteb-input-type-taxonomy

IN premise — summaries/2026/08/24/muennighoff-2022-mteb-sR-references.md

Created 2026-08-25T02:58:23+00:00

MTEB uses three input type notations: s2s (sentence-to-sentence), p2p (passage-to-passage), and s2p (sentence-to-passage).

Summary

MTEB sorts its benchmark tasks by what kind of text gets compared, using a shorthand that distinguishes between sentence-level and passage-level inputs. This is the foundational vocabulary for discussing MTEB results, so knowing which comparison type a task falls under is necessary before you can interpret scores or decide how to format inputs for a model.