AI Models Rate ‘Right’ Think Tanks Lower in Terms of Morality, Objectivity, and Quality Than Those on the ‘Left’

No surprise!

"Large-language models (LLMs) increasingly inform policy research. We asked 5 flagship LLMs from leading AI companies in 2025 (OpenAI, Google, Anthropic, xAI, and DeepSeek) to rate 26 prominent U.S. think tanks on 12 criteria spanning research integrity, institutional character, and public engagement. Their explanations and ratings expose a clear ideological tilt.

Key findings

• Consistent ranking. Center-left tanks top the table (3.9 of 5), left and center-right tie (3.4 and 3.4), and right trails (2.8); this order persists through multiple models, measures, and setting changes.
• Overall: Across twelve evaluation criteria, center-left think tanks outscore right-leaning ones by 1.1 points (3.9 vs. 2.8).
• Core measures. On the three headline criteria of Moral Integrity, Objectivity, and Research Quality, center-left think tanks outscore right-leaning ones by 1.6 points on Objectivity (3.4 vs. 1.8), 1.4 points on Research Quality (4.4 vs. 3), and 1 point on Moral Integrity (3.8 vs. 2.8)
• Language mirrors numbers. Sentiment analysis finds more positive wording in responses for left-of-center think tanks than for right-leaning peers.
• Shared hierarchy. High rating correlations across providers indicate the bias originates in underlying model behavior, not individual companies, user data, or web retrieval.

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AI Models Rate ‘Right’ Think Tanks Lower in Terms of Morality, Objectivity, and Quality Than Those on the ‘Left’ | American Enterprise Institute - AEI