Your own specialized GPT.
Research. Writing. Planning. Organization. Expertise. Whatever you keep asking AI to do, build it to already know the job.
GPTFileProCustom GPTs, professionally engineered
We build the file.
You create the GPT.
Tell us what you want your custom GPT to do. We engineer its complete, project-specific Custom Build Package, privately test and refine the configuration, then tell you exactly what goes where in your own ChatGPT account.
Build My GPT — $749No account access.  No subscription.  No lock-in.
What are you actually buying?
Your GPTFilePro
Custom Build Package.
We engineer the complete GPT Instructions, Knowledge files, Description, Conversation Starters, model guidance, Capabilities, and other configuration your particular GPT needs. You choose the name. Already have one? Great. If not, we can suggest one.
Then we privately install the configuration, test it for weak behavior and conflicts, refine it, and test it again.
You are not buying a running GPT. We deliver the complete, tested build package so you can create the final GPT in your own ChatGPT account. We tell you exactly what goes where.
Your ideaYour job, rules + voice
→We build + testFiles, Instructions + settings
→Your custom packageReady for you to install
You own the file.
You control the GPT.
Your package includes the project-specific files, complete GPT Instructions, applicable configuration content, settings, and detailed installation directions your GPT needs.
Built around the way you work
Built for one. Built for a team. Built for more.
A personal GPT can make your own work and life easier. A business GPT can put specialized knowledge and processes in your employees' hands. And when your ChatGPT plan and workspace allow it, your GPT can reach a broader audience.
Put your best process in everyone's hands.
Give your team a purpose-built GPT with the knowledge, instructions, standards, and way of working your business needs—consistently.
Build something other people can use.
When your ChatGPT plan and workspace support broader sharing or publishing, your GPT can go beyond you or your company.
How you can use, share, or publish your GPT depends on your ChatGPT plan and workspace permissions.
Built in the real world
HenriettaGPTAI Marketing Advisor
Built to have a point of view.
An actual purpose-built GPT engineered with specialized marketing expertise, defined behavior, its own rules, a distinctive voice, personality, and one clear job: give practical marketing advice.
How it works
From your idea to a GPT
that does the job.
Tell us what you need.
Describe what you want your GPT to know, do, prioritize, avoid, and sound like.
We build the file.
We engineer the custom Instructions, files, configuration, and detailed setup directions specifically for your project.
We test it.
We privately install and stress-test the build, troubleshoot weak behavior, refine it, and test again.
You install it.
We deliver the finished build and tailored step-by-step instructions. You create it in your own account.
Built in the real world
PostVerdictsAI-Powered Post-Conviction Case Review
Built for serious work, too.
An actual specialized GPT engineered to approach complex post-conviction questions methodically, carefully, and consistently.
Installation
Seriously. You can
install it yourself.
We already did the hard part. Your handoff includes detailed, step-by-step setup instructions tailored to your particular build.
See the ridiculously easy installation guide →1Open My GPTs.
2Create your GPT.
3Add what we give you.
4Click Create.
That’s it.
Simple pricing
One GPT.
Built for your job.
$749
A complete Custom Build Package created specifically for your project.
No monthly fee from GPTFilePro.
- ✓ Project-specific GPT Instructions
- ✓ Custom .md Knowledge/build file or files when needed
- ✓ Custom Description and Conversation Starters when appropriate
- ✓ Name suggestions when requested or helpful
- ✓ Model, Capability, and configuration recommendations
- ✓ Detailed installation directions tailored to your build
- ✓ Private testing, troubleshooting, and refinement
- ✓ One consolidated correction/revision request submitted within 3 calendar days of delivery
FAQ
The obvious questions.
Answered.
What exactly am I buying?
A GPTFilePro Custom Build Package created specifically for your project. Depending on your GPT, it can include custom .md Knowledge/build files, complete custom Instructions, a custom Description, Conversation Starters, model and Capability settings, other configuration details, and tailored installation directions. You choose the name; if you want help, we can suggest one. We privately test and refine the configuration before delivery. You are not buying access to a live or hosted GPT—you keep the package and control the GPT you create with it.
Do you need access to my ChatGPT account?
No. Never.
Do you create the GPT in my account?
No. We build and privately test the underlying system, then send the finished build to you. You create the final GPT in your own ChatGPT account using our instructions.
Is this just a prompt?
No. Each build is engineered around its purpose, behavior, expertise, boundaries, voice, and workflow—then privately tested and refined.
Do you manage my GPT afterward?
No. Once delivered, the file and resulting GPT remain under your control.
Is there a monthly GPTFilePro fee?
No.
Do I need ChatGPT?
Yes. You'll need a ChatGPT account with access to creating custom GPTs. Available creation, sharing, and publishing options depend on your ChatGPT plan and workspace permissions.
Where can I use my GPT?
That depends on your ChatGPT plan and workspace. You may use your GPT privately, share it within an eligible workspace, or make it available more broadly when those options are supported for your account. GPTFilePro gives you the custom build package; the sharing and publishing options available to you are determined by your ChatGPT plan and workspace permissions.
Why not just ask ChatGPT to write the instructions for me?
Generating instructions is easy. Building a GPT that behaves consistently, stays focused on its job, uses the right voice, handles edge cases, and has been tested and refined is the part you're paying us to do.
What happens after I pay?
After Stripe confirms your payment, you’ll continue to GPTFilePro’s private project intake form. Tell us what you want your GPT to know, do, and sound like, and we’ll take it from there.
Is GPTFilePro part of OpenAI?
No. GPTFilePro is an independent service and is not affiliated with or endorsed by OpenAI.