this post was submitted on 11 Mar 2026
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49
How Much Do LLMs Hallucinate in Document Q&A Scenarios? A 172-Billion-Token Study Across Temperatures, Context Lengths, and Hardware Platforms [TLDR: 25%] (arxiv.org)
submitted 4 hours ago* (last edited 4 hours ago) by RandAlThor@lemmy.ca to c/technology@lemmy.world
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Evaluating 35 open-weight models across three context lengths (32K, 128K, 200K), four temperatures, and three hardware platforms—consuming 172 billion tokens across more than 4,000 runs—we find that the answer is “substantially, and unavoidably.” Even under optimal conditions—best model, best temperature, temperature chosen specifically to minimize fabrication—the floor is non-zero and rises steeply with context length. At 32K, the best model (GLM 4.5) fabricates 1.19% of answers, top-tier models fabricate 5–7%, and the median model fabricates roughly 25%.

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[–] CubitOom@infosec.pub 4 points 2 hours ago* (last edited 2 hours ago) (1 children)

What word would you propose to use instead?

Fabrication?

[–] Scipitie@lemmy.dbzer0.com 3 points 2 hours ago (1 children)

That's my problem: any single word humanizes the tool in my opinion. Iperhaps something like "stochastic debris" comes close but there's no chance to counter the common force of pop culture, Corp speak a and humanities talent to see humanoid behavior everywhere but each other. :(

[–] Telorand@reddthat.com 3 points 2 hours ago (1 children)

We do enjoy pareidolia, don't we?

[–] deranger@sh.itjust.works 1 points 49 minutes ago

Paredolia just means seeing patterns that aren’t there, it’s not implicitly human. If you see a dog in the clouds, that’s paredolia.