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Both OpenAI and Anthropic Release Official Prompting Guides Simultaneously — 'Your Old Prompts Don't Work Anymore'
Both OpenAI and Anthropic released official prompting guides in the same week, and both reach the same conclusion: old prompts no longer work. But for opposite reasons — Claude Opus 4.7 stopped guessing intent and does exactly what you type, while GPT-5.5 defaults to 'efficient, direct, and task-oriented' output. The viral post (2,301 likes) highlights that prompting paradigms have fundamentally shifted with this generation of models.
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