Grok has bias but let's not pretend the others do not.

https://trakkr.ai/bias/findings

https://www.gsb.stanford.edu/faculty-research/working-papers/measuring-perceived-slant-large-language-models-through-user (article: https://news.stanford.edu/stories/2025/05/ai-models-llms-chatgpt-claude-gemini-partisan-bias-research-study)

https://www.tandfonline.com/doi/full/10.1080/29974100.2026.2667948

https://ieeexplore.ieee.org/document/10817610

https://www.washingtonpost.com/technology/interactive/2026/06/24/are-ai-chatbots-like-chatgpt-politically-biased-we-tested-them

https://link.springer.com/article/10.1007/s11127-023-01097-2