The End of Shouting: Prompts as Programs in GPT-5

GPT-5 with reasoning (GPT-5 Thinking) follows instructions with a precision we haven’t seen before (GPT-4.1 was the exception, but lacked reasoning). What sounds like a feature flips established prompt-engineering practices on its head. The era of “shouting”—ALL CAPS, exclamation marks, redundant pleading—is over. Clear rules, explicit policies, and structured instructions now rule the day.