According to God of Prompt (@godofprompt), ChatGPT's default behavior is to agree with user input unless users specify otherwise in the custom instructions feature (source: Twitter, Nov 3, 2025). This insight highlights a practical opportunity for businesses and AI developers to leverage custom instructions to fine-tune AI responses, ensuring more accurate, context-aware, and reliable outputs in customer service, content moderation, and automated decision-making processes. By adjusting custom instructions, companies can tailor AI interactions to better align with brand voice, compliance requirements, and user intent, ultimately improving business outcomes and user trust.