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News/Investigating Assistant Bias in LLM User Simulators Using a Role Vector
arxiv
PublishedSeptember 2, 2026 at 4:00 AM
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Investigating Assistant Bias in LLM User Simulators Using a Role Vector

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arXiv:2609.00608v1 Announce Type: new Abstract: LLM-based user simulators are increasingly used to evaluate autonomous agents at scale, in place of costly human evaluations. Despite this promise, these simulators exhibit "assistant bias," a tendency to cooperate and pursue task goals. They rarely re

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