You will get Custom GPT Development & AI Assistant Setup for Your Business
Project details
Want an AI assistant that actually knows YOUR business? I build custom GPTs trained on your content, your voice, and your rules — not generic chatbots.
Your custom GPT can handle customer support, qualify leads, answer your team's questions, draft on-brand content, and more — instantly, 24/7. It learns from your FAQs, documents, website, and processes, so every answer is accurate and on-brand.
WHAT MAKES THIS DIFFERENT:
• Built around your exact use case — no templates
• Trained on your real content and tuned to your tone
• Tested across real scenarios before delivery
• Clear setup guide included — no tech skills needed
• Safe boundaries so it never "makes things up"
WHAT YOU GET:
• A fully-built, trained, tested custom GPT
• System prompt & instructions documentation
• Step-by-step setup & user guide
• Testing report so you launch with confidence
Whether you want to save hours on repetitive questions, capture more leads, or give your team an instant expert — I'll design the right AI assistant for your goals.
Powered by ChatGPT & Claude. Let's build yours.
Your custom GPT can handle customer support, qualify leads, answer your team's questions, draft on-brand content, and more — instantly, 24/7. It learns from your FAQs, documents, website, and processes, so every answer is accurate and on-brand.
WHAT MAKES THIS DIFFERENT:
• Built around your exact use case — no templates
• Trained on your real content and tuned to your tone
• Tested across real scenarios before delivery
• Clear setup guide included — no tech skills needed
• Safe boundaries so it never "makes things up"
WHAT YOU GET:
• A fully-built, trained, tested custom GPT
• System prompt & instructions documentation
• Step-by-step setup & user guide
• Testing report so you launch with confidence
Whether you want to save hours on repetitive questions, capture more leads, or give your team an instant expert — I'll design the right AI assistant for your goals.
Powered by ChatGPT & Claude. Let's build yours.
AI Development Type
Knowledge Representation, Model TuningAI Development Language
PythonWhat's included
| Service Tiers |
Starter
$150
|
Standard
$400
|
Advanced
$800
|
|---|---|---|---|
| Delivery Time | 4 days | 7 days | 14 days |
Number of Revisions | 2 | 2 | 5 |
AI Model Integration | |||
Detailed Code Comments | - | - | - |
Knowledge Graph | - | ||
Model Documentation | |||
Ontology | - | - | |
Source Code | - | - | - |
Taxonomy | - |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$75 - $175
Additional Revision
+$40Frequently asked questions
About Diamantis
AI Web Developer | Next.js & OpenAI Specialist
Athens, Greece - 9:52 pm local time
I specialize in creating AI-powered web applications using the latest technologies — OpenAI GPT-4, Claude, Next.js, React, and Node.js. I help businesses, startups, and agencies build custom chatbots, automated workflows, and full-stack web apps that leverage AI to solve real problems.
Here's what I bring to the table:
✅ Custom AI integrations (OpenAI, Anthropic Claude, Google Gemini)
✅ Full-stack web development (React, Next.js, Node.js, TypeScript)
✅ Clean, documented code with modern best practices
✅ Fast delivery and clear communication throughout
Whether you need an AI chatbot for your website, a custom dashboard with intelligent features, or a complete SaaS application, I deliver production-ready solutions you can trust.
Let's build something amazing together! Click "Message" to discuss your project.
Steps for completing your project
After purchasing the project, send requirements so Diamantis can start the project.
Delivery time starts when Diamantis receives requirements from you.
Diamantis works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & Planning
We define your goals, use cases, and the content your GPT will learn from.
Build & Train
I create your custom GPT with tailored instructions, knowledge base, and tuned behavior.