I put ChatGPT-4o and 5.1 through 9 real-world tests — from logic puzzles to coding, writing and image analysis.

They recognize AI’s challenges and long-term unknowns, but they also believe that with proper guardrails, AI is already ...

Is language core to thought, or a separate process? For 15 years, the neuroscientist Ev Fedorenko has gathered evidence of a ...

The first five years of a child’s life are critical for language exposure, but studies suggest children in lower-income families often don’t experience the rich literary environment wealthier kids do.