The article says "expert testers." "Evaluations by expert testers showed that o3-mini produces more accurate and clearer answers, with stronger reasoning abili

The article says "expert testers." "Evaluations by expert testers showed that o3-mini produces more accurate and clearer answers, with stronger reasoning abilities, than OpenAI o1-mini. Testers preferred o3-mini's responses to o1-mini 56% of the time and observed a 39% reduction in major errors on difficult real-world questions. W"