Welcome back to The Fifteenth Page Show—the podcast for all things AI, brand marketing, and women’s health.

In this episode, we’re doing something we’ve never done before on the podcast: a live, step-by-step screen-share walkthrough of how we set up one of our own Custom GPTs.

If you’ve mostly been using ChatGPT as a copywriter—for headlines, captions, or blog drafts—this episode is for you. We’re showing how we actually use AI day-to-day at Fifteenth Page: as a strategic thinking partner, not just a writing tool.

📺 This is a video-first episode. If you’re listening on audio, we strongly recommend switching to video so you can follow along as Amanda shares her screen and builds the GPT in real time.

• Why using ChatGPT only for copy is leaving a lot of value on the table

• How we use Custom GPTs to pressure-test marketing ideas before they go live

• A beginner-friendly walkthrough of setting up a Custom GPT (no coding required)

• How to define roles, instructions, output rules, and required inputs

• What “knowledge docs” are, when to upload them, and when not to

• How Custom GPTs help small teams move faster—and stay aligned

• Why sharing Custom GPTs with teammates helps everyone work from the same playbook

You’ll see us build our Idea Challenger GPT—a custom tool we use to poke holes in marketing ideas, challenge assumptions, and suggest stronger alternatives (instead of just handing out gold stars).

• Custom GPTs are available with a paid ChatGPT plan (starting at $20/month)

• Similar features exist in other tools too (Gemini Gems, Claude Projects), even though we’re demoing ChatGPT specifically

• We’ve included the exact prompt we use so you can copy, paste, and adapt it for your own business

📄 Google Doc with the full Custom GPT prompt so you can follow along or build it live with us.

We build Custom GPTs like this with our clients all the time—especially for content teams and women’s health brands that need messaging alignment, consistency, and speed without sacrificing quality.

If you’re wondering “What could a Custom GPT do for our team?”—that’s exactly the kind of question we love answering.

Thanks for tuning in—and if you build one after watching, let us know how it goes.