OpenAI launches GPT-5.4, calling it its most capable and efficient AI model yet, with AI agents, computer control, improved reasoning, and a 1M-token context.

We often mistake the "aha!" moment of a clear explanation for actual mastery. The feeling of learning can be a psychological illusion, but we can spot the difference.

Robert Kelly is managing director of XTS Energy LLC, and has more than three decades of experience as a business executive. He is a professor of economics and has raised more than $4.5 billion in ...