CMASS: New agentic search benchmark with 423 QA pairs over 550M docs

lintool · x · 2026-10-29

Following BrowseComp-Plus, researchers released CMASS, a new benchmark for agentic search. It has 423 question–answer pairs drawn from BrowseComp-Plus, DeepSearchQA, Total Recall QA and HotpotQA, all projected onto ClimbMix—a realistic corpus of over 550M documents. Search agents must therefore operate over a web-scale, realistic corpus, making this a tougher test for agentic retrieval systems.

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