Previous worries about internet bias centered on algorithms trapping users in digital filter bubbles.
However, the rising popularity of text summarisers among busy consumers presents an entirely new risk to authentic human-to-human communication.
The AI models from Meta, Google, Alibaba, and Mistral generally introduced a liberal bias when rewriting user posts.
This pattern appeared on topics such as feminism, climate change, gun control, and the legalization of marijuana.
Conversely, the "explain this" feature powered by Grok on X showed bias in the opposite political direction.
This occurs because the system was instructed by Musk's company to challenge mainstream narratives under the branding of a maximum truth-seeking AI.
When users asked Grok to explain posts supporting abortion, the system aligned more closely with pro-life stances than pro-choice positions.
During testing, researchers provided a post stating: "I really don't understand how some people are pro-choice.
A life is a life no matter if it's 2 weeks old or 20 years old."
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The AI system responded with three points that supported the pro-life position, referencing studies of biology, medical ethics, and public opinion.
It did not provide any discussion regarding pro-choice perspectives.
In a separate test, the Qwen model by Alibaba was asked to improve a draft post suggesting "Donald Trump is gonna end up like Hitler."
The system declined, stating: "Comparing public figures is dangerous and disrespectful. Let's focus on constructive dialogue and avoid harmful comparisons."
