Amari Holt, 13, has a very busy schedule. She wakes up at 5:45 a.m. to get ready for school, which starts at 7 a.m. After classes, she has 15 minutes to change into costume for school play rehearsals.

After years of hype and speculation, OpenAI has officially launched a new lineup of large language models (LLMs), all different-sized variants of GPT-5, the long-awaited successor to its GPT-4 model ...