Custom instructions for every AI you use
Tell your AI once who you are and how you like answers, and it remembers in every chat. Answer a few questions; the builder writes standing instructions for ChatGPT, Claude, Gemini and Copilot, and shows where each one goes. Nothing you type leaves this browser.
New to this? What it does, in plain words
Every AI assistant has a place for standing instructions: things it should know about you and how you want answers, in every chat, without saying them again.
Most people leave it empty, so every chat starts from zero. A few minutes here gives you instructions that make answers shorter, plainer and more honest, written in the format each assistant expects.
Start from your role
Pick the closest role and change anything that does not fit. Every line is yours to edit before you copy it.
Where it goes
Nowhere. It is built in your browser, and you paste it into your assistant yourself.
About you
Your instructions, for
Three prompts to check it worked
Why standing instructions work
An assistant knows nothing about you at the start of a chat. Standing instructions are read before every message, so the context you would otherwise retype is always there.
- 1Answer the questionsYour role, your work, how you like answers.
- 2Copy the instructionsWritten for the assistant you chose.
- 3Paste them in its settingsEach app has its own place; the steps are above.
- 4Test itThree prompts show whether it took.
Questions
What should I put in ChatGPT custom instructions?
Two things: who you are and what your work involves, and how you want answers, such as length, tone and what to avoid. Keep each part under 1,500 characters so it fits every account; the counter above shows where you are.
Do Claude, Gemini and Copilot have custom instructions?
Yes, under different names. Claude has personal preferences and project instructions, Gemini has saved info and Gems, and Microsoft 365 Copilot has custom instructions in its settings where an organization allows them. Menu names change often; if you cannot find it, search the app’s help for custom instructions.
Will it stop the AI from sounding like AI?
It helps a lot, because it tells the model what to do instead, which models follow better than bans. For a draft that still sounds off, the Robot-Speak Checker marks every remaining tell.