LisanBench evaluates LLM reasoning with word chain benchmark

thisguyknowsai · x · 2026-08-21

LisanBench is a new LLM benchmark testing basic reasoning via word chains. Models must build the longest chain of non-repeating English words where each differs from the last by exactly one letter. The site features a leaderboard, release-date trends, efficiency charts, and analysis of failure modes like dead ends and invalid moves.

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