Like a lot of things in tech and pop science, "AI psychosis" had a narrow(-er) definition [1] (psychotic-like symptoms, i.e. believing the AI is in love with you, or being fueled by the AI into some strong delusions or belief in a "mission" so important your faith in it becomes quasi-religious/"destiny"), which aligned loosely with actual psychiatric symptoms.

The much broader version of people getting a bit too full of themselves or trusting an LLM's sycophantic nature as validation that they are right or uniquely smart with their ideas seems to be the version I'm seeing more of in tech news sites and places like HN

[1] https://www.psychologytoday.com/us/blog/urban-survival/20250...