this post was submitted on 11 Mar 2026
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178
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 2 days ago* (last edited 2 days 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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[–] HubertManne@piefed.social 0 points 1 day ago (1 children)

This is why I would encourage people to use llms for something not important. like video games or interests. You likely will have enough knowledge around the things to catch the "hallucinations" and hopefully that will give you perspective on their use for more important things.

[–] Son_of_Macha@lemmy.cafe 3 points 23 hours ago (1 children)

Or not at all

[–] HubertManne@piefed.social 0 points 23 hours ago (1 children)

see if they don't at all then they can fall victim to thinking they are better than they are. By using it a bit in something unimportant which you are knowledgable enough about it allows you to see the flaws and it does not take that much time to see them.

[–] Son_of_Macha@lemmy.cafe 1 points 19 hours ago

That makes no sense at all