Nine custom GPTs inside ChatGPT, all reachable from a single search, cover the whole cycle of building a personal brand: sharper prompts, slides, a business plan, your mission, a color palette, an ideal customer, topic angles, a 30-day calendar and headlines. AI Central's 9 Best GPTs on ChatGPT shows each one with its real output. The finding worth acting on is that they are not nine separate tools, they are a sequence.
Reviewed August 2026.
How to get to them
AI Central's route in is a publisher search, not a browse. Open the ChatGPT sidebar, choose Explore GPTs, then search the name Ruben Hassid. All nine sit under that one name, which is why AI Central gives you a single search instead of nine separate links. Two of them also announce where they came from the moment they open. Mission-GPT says it comes from EasyGen, and Color Theory says it comes from Ruben Hassid's Substack.
What each of the nine actually does
AI Central pairs every GPT with a one-line job and a screenshot of it running, so the set reads as nine jobs rather than nine products. Taken in the order AI Central presents them, here is what each one is for.
- Prompt Maker takes a rough one-line request and hands back a full, structured prompt.
- Gamma-PPT turns a short brief into a slide deck with the bullet points already written.
- Business Plan is there to help you build a strong one.
- Mission-GPT runs a questionnaire to find your one-liner why.
- Color Theory chooses a palette and a font pairing from your brand's mission statement.
- ICP-GPT writes out a single named ideal customer, from their goals down to how they engage.
- Topic-GPT produces content angles, each with a format and an objective attached.
- Calendar-GPT lays angles like those across a 30-day calendar.
- Headline-GPT writes twenty LinkedIn headlines for one specific person.
The prompt upgrade is a formula
The clearest lesson in AI Central's nine is not a GPT at all, it is what Prompt Maker does to a sentence. The input was one line asking for a prompt to generate brainstorming sessions with a creative director for a new fashion magazine. What came back opened like this.
Act like a visionary creative director specializing in cutting-edge fashion editorial design, with 20 years of experience launching and managing successful fashion magazines globally.
Three moves are doing the work in the version Prompt Maker returned, and you can copy all three without ever opening the GPT. It assigns a role, then narrows that role with a specialism and a tenure instead of leaving it at creative director. It states an objective and names the audience inside it, young adults aged eighteen to thirty who are fashion-forward, environmentally conscious and socially active. Then it dictates the shape of the answer with numbered steps, defining the vision and style first, then generating five feature ideas.
That is the difference between a request and a brief. By showing the before and the after side by side, AI Central makes the mechanism visible: the second version constrains the model in three dimensions at once, who is answering, what the goal is, and in what order the answer has to arrive.
The nine are a chain, not a menu
Run in AI Central's order, the outputs feed each other, and that is where the leverage actually sits. Mission-GPT goes first, and it is blunt about its job.
I will help you determine your one-liner why.
It then works through one question at a time, starting with the problem you are passionate about solving and moving on to the perspective or expertise you bring to it. ICP-GPT picks up from there and turns a description of an audience into one named person. In AI Central's walkthrough that person is Sarah Mitchell, a marketing manager at a mid-sized advertising agency, and the profile runs all the way down to how she prefers to be spoken to.
Sarah prefers content that is professional and authoritative, offering a sense of credibility and expertise, while avoiding fluff or overly casual language.
Headline-GPT then writes for Sarah specifically, twenty headlines tailored to her role, her goals and her challenges, split into a professional and impact-driven set and a wittier one. Topic-GPT supplies angles, each tagged with a content type such as video, carousel or infographic and an objective such as inspiration, education or advocacy. Calendar-GPT sequences the result into days.
There is a tell in AI Central's screenshots that proves the chain is live rather than theoretical. The phrase Decoding Marketing Complexity for Smarter Strategies is typed into Mission-GPT as an answer early on, and it reappears later as headline number nine. The chain compounds, which is the point, and it also recycles your own phrasing back at you, which is the risk.
Where the output still needs you
Two of the runs AI Central captured are quietly instructive about the limits of all of this.
The 30-day calendar is a rotation, not thirty ideas. The formats cycle in a fixed order of five, an image quote, an infographic, a vertical video, a carousel PDF and a long video, then start over. Day six and day sixteen carry the identical entry, a daily news roundup of the top three stories you missed. It is a useful skeleton, but you are the one supplying the variety.
The slide deck arrives with citations attached to its claims. Asked for ten slides on overcoming the fear of posting on LinkedIn for an audience of executives and CEOs, the GPT thought for over a minute and came back asserting that roughly ten percent of LinkedIn's billion members post regularly, that CEO posts earn four times the platform average in impressions, and that sixty-six percent of customers say they are more likely to buy when the CEO is active online. Each of those carried a footnote marker. A footnote marker is not a source. Check every one of them before that deck goes in front of a board.
The habit worth stealing is the confirmation loop
Color Theory is the smallest GPT in AI Central's set and the best designed. It asks for exactly one mandatory input, a one-sentence brand mission, and marks everything else optional, the target audience, three adjectives describing the brand personality, and the primary use cases such as website, social, print or packaging. Then it does something most people never build into their own prompts.
Once I have those essentials, I’ll echo your mission back to you to be sure we’re perfectly aligned before diving into color and typography.
That echo is a checkpoint. It costs one exchange, and it catches a misread brief before the model spends a long, confident answer on the wrong thing. You can append the same instruction to the end of any prompt you write, which makes it the cheapest upgrade anywhere in AI Central's nine.
What to do with this
- Starting cold, run Mission-GPT and then ICP-GPT, and save both outputs as plain text. Every other GPT in the set gets better once it has them.
- Already know your audience, skip to Topic-GPT and Calendar-GPT, and treat the calendar as a scaffold you overwrite rather than a plan you follow.
- Writing your own prompts, lift Prompt Maker's three-part structure and you can skip the GPT entirely: a role with a specialism and a tenure, an explicit objective with the audience named inside it, then numbered steps.
- Add the echo-back instruction to any prompt where a misunderstanding would be expensive.
- Fact-check anything a GPT footnotes before you present it as yours.
AI Central's own closing line on the set is that ChatGPT is a tool, and the advice attached to it is to try the GPTs, polish the output, and stop waiting for inspiration. That order matters. None of these nine produce finished work, they produce a first draft fast enough that editing becomes the only job left.
How do I find these GPTs in ChatGPT?
Open the sidebar, choose Explore GPTs, and search for Ruben Hassid. AI Central points you at the publisher name rather than at each GPT individually, because all nine sit together under it.
Which one should I run first?
Mission-GPT, then ICP-GPT. AI Central's order is deliberate, because the mission statement and the customer profile are inputs that the later GPTs consume. Running headlines or a calendar first means answering the same questions twice.
Do I need to prepare anything before I start?
One sentence describing what you do and who you do it for. Color Theory makes that mission statement its only mandatory input, and Mission-GPT exists to produce one if you do not have it yet. Everything else the nine ask for is optional.
Will the 30-day calendar give me thirty different ideas?
No. It rotates five content formats in a fixed order and repeats entries, with day six and day sixteen identical in AI Central's example. Treat it as a publishing rhythm and bring your own topics to fill it.
Can I trust the statistics a GPT puts into my slides?
Not without checking. The deck in AI Central's walkthrough came back with confident figures about LinkedIn posting behavior, each carrying a footnote marker. A marker signals that a claim wants a citation, it does not supply a verified one, so check the numbers before you present them.