ChatGPTのパーソナライズ

Personalizing ChatGPT | OpenAIApril 10, 2026OpenAI AcademyCustomize ChatGPT’s behavior with instructions and memory to fit your needs.ChatGPT works best when you treat it less like a search box and more like a collaborator. It’s a new kind of tool—one that responds in a conversational way, can take on a “personality,” and adapts based on the guidance you give it. The more context and direction you provide, the more useful (and consistent) it becomes.In this section, you’ll learn two simple ways to personalize ChatGPT so it behaves more like a reliable teammate: Custom instructions and Memory. Custom instructions tell ChatGPT what it should know about you and how you prefer it to respond. These settings apply to new conversations until you change, disable, or remove them.Even small details can meaningfully improve results, such as:Your role and responsibilities (“I lead customer onboarding” or “I’m a finance manager”)Your preferred tone (concise, formal, friendly)The types of outputs you want (bullets, tables, drafts you can copy and paste)Guardrails (“Ask clarifying questions if requirements are unclear”)Tip: Think of custom instructions like setting your default “working style” so you don’t have to repeat yourself every time. Use them for stable preferences (role, tone, formats), and use the chat prompt itself for the specific task at hand.Memory helps ChatGPT remember details you choose to share so future replies can feel more tailored—without you re-explaining the basics each time. It can store information you explicitly ask it to remember, and (if enabled) use recent conversation context to respond more helpfully. This can improve relevance over time as ChatGPT builds a clearer picture of what you need.You can also manage Memory directly in conversation:Ask: “What do you remember about me?”Say: “Remember that…” to save somethingSay: “Forget that.” to remove a specific itemTip: Memory works best for for recurring context (your role, common projects, preferences). Avoid saving one-off details that won’t matter later.As you get more comfortable with chats, you may notice certain tasks or workflows you repeat often. This is where tools like skills can help.Skills let you turn repeatable tasks into structured, reusable workflows. Instead of starting from scratch each time, a skill can guide ChatGPT to follow a consistent process, format, or set of instructions that matches how you work.Over time, this can help you move from one-off prompts to more consistent workflows for the tasks you do often.