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Polistemics: Evaluating LLMs as Information Mediators in Politics & Elections
arXiv cs.AI · Publié le · 3 min de lecture
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- Ce qui s'est passé
- Researchers introduced Polistemics, a benchmark for evaluating whether large language models responsibly mediate political information during elections.
- Pourquoi ça compte
- Engineers building or deploying LLMs for news, search, or political content should understand how these systems handle election information.
- Vigilance
- The study found no model consistently delivers reliable mediation; all break down when information is absent, vague, or contradictory.
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Computer Science > Computation and Language
arXiv:2607.25953v1 (cs)
[Submitted on 28 Jul 2026]
Title: Polistemics: Evaluating LLMs as Information Mediators in Politics & Elections
Authors: Baran Peters
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Abstract: As LLMs increasingly mediate the political information citizens rely on, there is still no standardized way to assess whether they do so responsibly. We introduce Polistemics, a theory-grounded benchmark for evaluating LLMs as mediators of political information in elections. Prior work has treated this task as reproduction rather than mediation, leaving its epistemic dimensions and interaction with imperfect information unaddressed. We ground the evaluation in Epistemic Modesty, a normative standard derived from citizens' epistemic agency, and test it across controlled settings that vary informational properties such as clarity, noise, and consistency. Applying the benchmark to three state-of-the-art LLMs on the 2025 German and Dutch elections, we find that high aggregate scores mask systematic failures. Models mediate reliably under clear evidence but break down under absent, vague, or contradictory information, while flattening the intensity of political language. These failures are likely driven by part
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