Polarization by Default: Auditing Recommendation Bias in LLM-Based Content Curation
Researchers audited three major LLM providers (OpenAI, Claude, Google) to assess content curation biases across Twitter/X, Bluesky, and Reddit. The study found that LLMs systematically amplify polarization, exhibit negative sentiment bias, and show political leaning bias favoring left-leaning authors, with varying degrees of mitigation through prompt design.
