The best custom GPTs on ChatGPT are not nine separate tools - five of them are stages in one content pipeline, and the other four are utilities you reach for as needed. All nine below are by Ruben Hassid: open ChatGPT's sidebar, hit "Explore GPTs", and search his name to find them. We publish AI systems like this for 300,000+ senior professionals at AI Central, and more of them live in the AI Central Library.
You are using custom GPTs as a menu
Most people treat the GPT store like an app drawer. You go in, find one that does a thing, use it, leave. Which is why nine tools sitting in a list looks like nine separate decisions, and most people make none of them.
Look at the list again. Five of the nine are not alternatives to each other. They are stages, and they run in an order. The chain is the product - the individual tools are components.
The content pipeline: 5 GPTs that run in order
1. Mission-GPT
Establishes what you are actually about, in one line. Everything downstream inherits this, which is why it runs first.
2. ICP-GPT
Turns that mission into a focused ideal customer profile - a specific person rather than a demographic.
3. Topic-GPT
Generates topic ideas and angles for that person, not for everyone. Output with nothing upstream of it reads like everyone else's - this is the step that prevents that.
4. CalendarGPT
Turns a high-performing post into a 30-day content calendar, sequencing those angles across a month.
5. HeadlineGPT
Drafts your LinkedIn profile headline, so the person all that content sends to your profile sees the same positioning the pipeline started with.
Run those five in order and you have gone from a vague sense of what you do to a scheduled month of content. Run any one alone and you get output with nothing upstream of it.
The 4 utility GPTs
6. Prompt Maker
Turns a rough request into a detailed, structured prompt. The same logic behind our 26 principles of prompt engineering, packaged as a GPT.
7. PPT Builder for Gamma
Drafts slide structure and content for use in Gamma, so the deck starts from an outline instead of a blank slide.
8. Business Plan Maker
Helps you build a strong business plan, giving the structure so you supply the substance.
9. Color Theory
Explores color and font options for your brand - useful right after Mission-GPT has told you what that brand actually is.
What actually changes
The reason custom GPTs underdeliver for most people is not that they are weak. It is that they get used as one-offs when their value is compounding - each one inheriting the output of the last.
If you are still setting up your wider stack, start with our guide to setting up ChatGPT, Claude and Copilot, and keep these 10 free AI cheatsheets on hand. More systems like this one live in the AI Central Library.
Frequently Asked Questions
What are the best custom GPTs on ChatGPT?
A strong starting set is the nine by Ruben Hassid: Mission-GPT, ICP-GPT, Topic-GPT, CalendarGPT and HeadlineGPT as a content pipeline, plus Prompt Maker, PPT Builder for Gamma, Business Plan Maker and Color Theory as utilities.
How do you find custom GPTs in ChatGPT?
Open ChatGPT's sidebar, click "Explore GPTs", and search by name or creator - for the nine here, search "Ruben Hassid".
What order should the content GPTs run in?
Mission-GPT first, then ICP-GPT, Topic-GPT, CalendarGPT and HeadlineGPT. Each stage inherits the output of the last, which is what makes the result specific to you.
Why do custom GPTs feel underwhelming?
Because they usually get used as one-off tools. Their value compounds when they are chained - a GPT working from your mission and audience produces output a standalone GPT cannot.
