Phase 7: Building Your Own AI Tools · 35 min · ChatGPT Plus (Custom GPTs), Claude (Projects), or Gemini (Gems)
Custom GPTs, Claude Projects & Gemini Gems
Stop pasting the same context every time. Build a custom AI tool that already knows your world.
Hiring signal: What changes when you use this: you build a Custom GPT, Claude Project, or Gemini Gem with a standing instruction set that shapes every answer — turning a general AI into a specialized tool for your work.
What you will learn
- Build a Custom GPT, Claude Project, or Gemini Gem with a standing instruction set
- Write effective system instructions that shape every answer
- Configure knowledge files and capabilities
- Test and iterate on a custom AI tool
The Problem
You're now pasting context files, style guides, and persona instructions at the start of every conversation. It works, but it's repetitive. What if the AI already knew all of that — every time, automatically?
That's what Custom GPTs (ChatGPT), Claude Projects, and Gemini Gems are: persistent AI configurations that load your instructions, knowledge, and settings every time you start a conversation.
The Three Options
| Feature | Custom GPT (ChatGPT) | Claude Project | Gemini Gem |
|---|
| Standing instructions | Yes | Yes | Yes |
| Knowledge files | Yes (upload docs) | Yes (upload docs) | Limited |
| Web browsing | Optional | No (but can search) | Yes |
| Code execution | Optional | Yes | Yes |
| Image generation | Optional | No | Yes |
| Sharing | Yes (public/private) | Yes (team) | Yes (public/private) |
| Cost | ChatGPT Plus | Claude subscription | Gemini subscription |
Unlock the full lesson
You've read the first 2 sections. The rest of this lesson covers What to Build, Writing the System Instructions, Testing and Iterating, Your Practice Rep — plus a hands-on lab, quiz, and project artifact.
Create a free account to unlock Phase 0 and Phase 1 of every course — no credit card.
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