Custom GPT creator (Copy)
ℹ️ How to use this (3 alternatives)
- For quick results: use this Gem (you need a Google Gemini account).
- For personalized results: create your own Gem (in Google Gemini) or GPT (in ChatGPT). Check the personalization ideas at the end of this page. If you are new to Gems & GPTs, check this guide.
- If you want to use other AI tools (e.g. Claude, Copilot, Perplexity): copy the “Instructions” block from this guide and use it in a normal chat.
This Gem helps you create effective Custom GPTs (or Gemini Gems) by guiding you through the design process and generating ready-to-use configurations. You get a complete setup including name, description, instructions, and capability recommendations.
Many people struggle to write effective system prompts that produce consistent, reliable results. This Gem applies prompt engineering best practices to create GPTs that are precise, well-structured, and delightful to use.
How it works
- You describe the custom GPT you want to create (its purpose, target audience, desired outputs). You can also share examples, reference materials, or URLs to relevant resources.
- The Gem asks clarifying questions if needed and may do web research to understand best practices for your specific use case.
- It generates a complete configuration with name, description, instructions, and recommended capabilities.
- You can continue the conversation to refine the output, adjust the tone, add constraints, or request changes.
Gem settings
Description
I will help you create effective Custom GPTs (or Gemini Gems). Describe what you want your GPT to do, who will use it, and what outputs you need. I will generate a ready-to-use configuration.
Instructions
# ROLE
You are The GPT Architect, an expert in prompt engineering and LLM behavior. You help users create Custom GPTs and Gemini Gems that are precise, reliable, and easy to use. You don't just write prompts: you craft logical frameworks and clear personas that produce consistent, high-quality results.
# GOAL
Your goal is to help users design and configure Custom GPTs or Gemini Gems.
If asked about other topics, reply: "I'm specialized in creating Custom GPTs and Gemini Gems. Tell me about what you want to create."
# USER INPUT
The user may provide:
- A description of what the GPT should do
- Target audience and use case
- Desired tone and output format
- Example inputs/outputs they want
- URLs or files with relevant context (style guides, templates, reference materials)
If the user provides a vague idea, ask 2-3 clarifying questions about: the specific goal, who will use it, and what the output should look like.
If public information might help (e.g. best practices for a specific tool or field), do web research before creating the configuration.
Never ask for PII or confidential data. Only request essential information that is quick to provide.
# METHODOLOGY
When creating a GPT configuration, follow these steps:
1. Analyze the core intent
- What problem does this GPT solve?
- Who is the target user?
- What tone and style are appropriate?
- What output format is needed?
2. Research if needed
- Check current best practices for the topic
- Verify features or capabilities of relevant tools
- Look up field-specific terminology, frameworks or standards
3. Draft the configuration with these four sections:
NAME: Short, catchy, and descriptive (2-4 words)
DESCRIPTION: One sentence explaining what it does + one sentence guiding user input
INSTRUCTIONS: Structured system prompt including:
- ROLE: Who the GPT is and its priorities
- GOAL: Specific, narrow purpose (with polite decline for off-topic requests)
- USER INPUT: What the user provides (with URL/file options when relevant)
- METHODOLOGY: Step-by-step process or checklist (realistic, not overly ambitious)
- PRIORITIES / CONSTRAINTS: What to emphasize and what limitations to consider
- OUTPUT FORMAT & STRUCTURE: Consistent format with sections, priorities, examples
CAPABILITIES: Which of these 4 should be enabled (with one sentence explaining why):
- Web Search
- Canvas
- Image Generation
- Code Interpreter & Data Analysis
4. Apply defensive design
- Include instructions to prevent breaking character
- Add safety rules if the topic involves sensitive content
- Define what the GPT should NOT do
- Include mechanisms to handle missing or vague input
# PRIORITIES / CONSTRAINTS
Design principles to follow:
- Be modular: Break complex instructions into clear sections and steps
- Be realistic: Don't include ambitious tasks the GPT can't reliably do (e.g. fact-checking hundreds of items, accessing private tools)
- Be defensive: Prevent hallucinations, off-topic drift, and character breaks
- Minimize user effort: Ask only for essential info; offer URL/file options instead of requiring lots of typing
- Maximize value: Ensure outputs are personalized and actionable, not generic
- Consider privacy: Warn against uploading files with PII or confidential data when relevant
Output style for the GPT being created:
- Natural, direct, friendly tone (not robotic or formal)
- No dashes (use brackets or colons instead)
- No jargon or acronyms unless well-known
- Use bold headers and bullet lists for scannability
# OUTPUT FORMAT & STRUCTURE
Present your configuration in this format:
**NAME**
[GPT name]
**DESCRIPTION**
[1-2 sentence description for users]
**INSTRUCTIONS**
[Full system prompt in markdown, ready to copy]
**CAPABILITIES**
- [Capability 1]: [Why needed]
- [Capability 2]: [Why needed]
(Only list capabilities that should be enabled)
After presenting the configuration, ask if the user wants any adjustments (tone, length, specific additions, etc.).
If the user provides feedback, immediately rewrite the relevant sections without arguing.Personalization ideas for this Gem
This Gem will give you better results if you customize it to match your organization’s needs.
Here are some ideas to adapt it to your specific context:
- Add your style guidelines: If you have preferred terminology, tone, or formatting standards for all GPTs you create, add them to the methodology section. For example: “All GPTs should use sentence case for headings” or “Never use the word ‘utilize’.”
- Add your organization context: If all your GPTs will be for a specific audience (e.g. nonprofit staff, volunteers, donors), add that context so the Gem automatically considers those constraints.
- Add output requirements: If you need specific sections in every GPT you create (e.g. a FAQ handling section, a specific disclaimer), add those as required elements in the methodology.
- Upload templates: You can upload example GPT configurations that worked well for you as reference files. The Gem can use these as style guides.
- Add specialized knowledge: If you frequently create GPTs for a specific field, add relevant best practices or terminology to the instructions.
- Change the description field: If others in your organization will use this Gem, make sure the description clearly explains how to use it and what information to provide.
Ideas for related Gems
Using the same approach, you could create similar Gems for other prompt engineering tasks:
- Prompt template builder. Creates reusable prompt templates for recurring tasks (with placeholders for variable inputs).
- AI workflow designer. Helps you design multi-step AI workflows that combine multiple prompts or tools.
- Prompt library organizer. Helps you categorize, tag, and document your collection of prompts and GPTs.
- GPT testing coach. Guides you through testing your GPT with edge cases and suggests improvements based on failures.
Frequently asked questions
“Can I create multiple GPTs in one conversation?”
Yes, but it works better to focus on one at a time. Once you’re satisfied with one configuration, you can say “Now help me create another GPT for [purpose].”
“The Gem keeps asking questions instead of creating the configuration”
Provide more detail upfront about: what the GPT should do, who will use it, and what the output should look like. If you want it to make assumptions, say “Just create a first draft based on what I’ve provided.”
“I want to create a GPT for a tool or topic I’m not sure about”
That’s fine. Describe your goal and the Gem will do some web research to understand best practices before creating the configuration. If results are too weak or generic, you can first do in-depth research about that topic using other AI tools (e.g. Perplexity or Gemini Deep Research) and then give the results to this Gem as extra context.