Build a Custom GPT for Creative Brief Writing

1. Go to chatgpt.com and log in.
2. Look for Explore GPTs in the sidebar, then click Create.

What you should see: A builder screen with two tabs, one for building by chatting and one for configuring fields directly. Troubleshooting: If you don't see the option to create a GPT, check that your plan includes it. The builder is not available on a free account, and it isn't available in the mobile app either, so switch to a desktop browser if needed.

Draft the GPT's instructions in a separate document first. Pasting half-formed instructions straight into the builder tends to produce a weaker result than writing them out fully beforehand.

1. Write a paragraph describing the GPT's job: drafting creative briefs for your brand using your standard sections (objective, audience, key message, mandatories, tone).
2. Include your brand's positioning statement and voice guidelines directly in the instructions, or note that they'll be uploaded as files.
3. Add one line telling it what to do when information is missing: ask a clarifying question rather than inventing details.

1. Switch to the Configure tab.
2. Give it a clear name, something like "[Brand Name] Brief Writer."
3. Write a one-line description of what it does.
4. Paste your instructions from Step 2 into the Instructions field.

What you should see: The name, description, and instructions fields all filled in, with a live preview chat on the side where you can test as you go.

1. In the Knowledge section, upload your positioning statement, voice guide, and 3-5 approved past briefs.
2. Keep this to a small, well-chosen set of files rather than everything you have. Retrieval accuracy tends to drop once you pass a handful of documents, so a tight set of your strongest examples works better than a large one.

What you should see: Your uploaded files listed under Knowledge.

1. Only turn on capabilities the brief-writing task actually needs. Web browsing and image generation are usually unnecessary here.
2. In the preview chat, test it with a real brief request.
3. Adjust the instructions if the output misses your standard sections or drifts from the voice guide, then test again.

What you should see: A brief that follows your standard structure and sounds like your brand, not a generic template.

1. Click Save or Publish.
2. Choose Only me unless you specifically want teammates to access it, in which case choose the link-sharing option instead of making it public.

What you should see: The GPT now appears in your sidebar or GPTs list, ready to open for any new brief.