Who would ChatGPT vote for, and why should we care?

This research brief presents an overview of our current knowledge about political bias in large language models (LLMs) and how this can affect and influence citizens when they turn to chatbots for voting advice, focusing hereby on Danish elections. We test various LLMs on their political ideology, their knowledge about the Danish party systems and whether they favour certain parties over others when recommending who to vote for based on provided voter profiles. We show that LLMs on policy issues align with centrist parties (Moderaterne, Radikale Venstre, Alternativet, Socialdemokratiet), and that LLMs based on candidate responses disproportionally recommend specific parties (Moderaterne, Liberal Alliance, Dansk Folkeparti, and Enhedslisten). The purpose of this brief is to raise awareness that chatbots should not be considered a reliable source for voting advice in light of the Danish parliamentary election in March 2026, the first national election in Denmark after the release of ChatGPT in November 2022. Based on a survey by the Digital Democracy Centre, in particular young voters might have turned to chatbots when making their decision on who to vote for. We argue that this might be problematic with respect to information quality, democratic participation, and digital critical thinking.


