This lesson explains the two-field architecture of ChatGPT's Custom Instructions feature — the 'About You' field and the 'Response Preferences' field — detailing how they function as persistent system-level context, differ from regular prompts, and reshape AI interactions through always-on personalization.
This lesson explains the two-field architecture of ChatGPT's Custom Instructions feature — the 'About You' field and the 'Response Preferences' field — detailing how they function as persistent system-level context, differ from regular prompts, and reshape AI interactions through always-on personalization.
{"scenes":[{"slideOrder":0,"text":"In this lesson, you'll explore the architecture behind ChatGPT's Custom Instructions feature. You'll learn how its two distinct fields work together to create persistent, system-level personalization. By understanding how these fields differ from regular prompts and how they reshape every conversation, you'll be able to configure ChatGPT as a truly personalized assistant tailored to your needs."},{"slideOrder":1,"text":"ChatGPT's Custom Instructions give you two purpose-built fields, not one. The Context field is your permanent dossier — you tell ChatGPT who you are, your role, expertise, and goals. The Behavior field controls how it responds — think tone, format, and detail level. A common mistake is blending them together, but they serve architecturally distinct functions. Each field gives you 1,500 characters, so you'll want to be precise and intentional with every word."},{"slideOrder":2,"text":"Unlike regular prompts, your Custom Instructions are injected at the system level before every new conversation begins. This means ChatGPT already knows your background and preferences without you repeating them. You can still override these defaults mid-conversation — asking for deep technical detail will trump a \"keep it simple\" instruction. Think of Custom Instructions as strong defaults that eliminate repetitive setup and let you jump straight to your real questions."}]}