Open-weight LLMs match or exceed commercial API performance on 9 of 34 political science classification tasks, with average F1 differences under 0.02 and clearest API advantages on complex multi-label tasks.
Theocharis, Yannis, Pablo Barberá, Zoltán Fazekas, and Sebastian Adrian Popa
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Open-Weight LLMs Are Often Competitive with Commercial APIs for Political Science Text Classification
Open-weight LLMs match or exceed commercial API performance on 9 of 34 political science classification tasks, with average F1 differences under 0.02 and clearest API advantages on complex multi-label tasks.