How to create a Custom GPT in ChatGPT — and what to actually use it for
Download the Tone of Voice guide generator prompt:
https://www.ai-for-experts.com/gpts/h...
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Most people using ChatGPT start every session from scratch — no context, no briefing, no memory of how you work. Custom GPTs fix that. They let you build a version of ChatGPT that already knows your business, your documents, and what good looks like for you. Every time you open it, it's ready.
In this video, Mark builds a tone of voice reviewer from scratch — a Custom GPT that checks written content against a brand guide and flags anything that's drifted. It's a practical example of what these tools can do, and a pattern you can follow to build one for any task you repeat regularly.
In this video
What a Custom GPT is and how it's different from a standard ChatGPT chat
How to build one from scratch using the Create tab — including the conversation-based setup process
How to upload your own documents (brand guides, writing examples, methodology) so the GPT works with your actual materials
How to test it against real content and refine the instructions before you lock it in
When it's worth the 10–15 minutes to build one — and what kinds of repeatable tasks it suits best
Chapters
0:00 - Introduction to Custom GPTs
1:01 - Building a Custom GPT from Scratch
1:57 - When to Build a Custom GPT
2:19 - Creating a Tone of Voice Guide
5:38 - Testing and Refining the Custom GPT
9:19 - Final Thoughts on Custom GPTs
If you're building an expert-led business, a major challenge is structuring and systemising the knowledge around your expertise. This channel explores practical ways to integrate AI into that process.
Links
Website: https://www.ai-for-experts.com/
YouTube: / @aiforexperts
#CustomGPT #ChatGPT #AIforExperts #AItools #ExpertBusiness