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| Step-by-step guide to creating a custom GPT with ChatGPT |
Custom GPTs allow you to create a version of ChatGPT designed for a specific purpose. Instead of giving the same instructions every time you start a conversation, you can configure a GPT with its own instructions, knowledge, and available capabilities.
For example, you can create a GPT for writing blog posts, analyzing documents, generating marketing ideas, helping with coding, or answering questions about a specific topic.
In this guide, we will show you how to create a custom GPT with ChatGPT step by step.
What Is a Custom GPT?
A custom GPT is a version of ChatGPT configured for a specific purpose. You can customize its behavior, instructions, knowledge, and other available capabilities depending on your account.
For example, instead of repeatedly telling ChatGPT:
Always answer like a professional SEO consultant.
You can create a GPT specifically configured for SEO tasks.
What You Need Before Creating a Custom GPT
Before you start, make sure you have access to ChatGPT through a web browser.
You can access the GPT area from the ChatGPT interface or directly through:
Step 1: Open the GPTs Section
Log in to ChatGPT using your web browser.
From the sidebar, open the GPTs section. You can also visit the GPTs page directly using the link above.
Screenshot suggestion: Show the ChatGPT sidebar with the GPTs section highlighted.
Step 2: Click Create
Inside the GPTs section, click Create.
This will open the GPT editor where you can start building your custom GPT.
Screenshot suggestion: Show the GPT creation screen with the Create option visible.
Step 3: Describe What You Want Your GPT to Do
Start by explaining the purpose of your GPT.
For example:
Create a GPT that helps bloggers write SEO-friendly articles. It should use a professional but simple writing style, organize content with clear headings, and suggest keywords and meta descriptions.
The builder can use your description to create an initial version of the GPT.
The more specific your instructions are, the easier it becomes to get consistent results.
Step 4: Configure Your GPT
After the initial version has been created, review the configuration carefully.
Name
Choose a name that immediately explains what the GPT does.
For example:
- SEO Article Assistant
- AI Writing Helper
- Blog Content Planner
A clear name is usually better than something generic such as My GPT.
Description
Write a short description explaining the purpose of the GPT.
Example:
Helps bloggers create structured, SEO-friendly articles and optimize titles, descriptions, and keywords.
Instructions
Instructions are one of the most important parts of a custom GPT.
Explain:
- What the GPT should do
- How it should respond
- Who it is designed for
- What rules it should follow
- What it should avoid
Example:
You are an SEO content assistant. Write clear, useful, well-structured articles. Avoid keyword stuffing and never invent facts or sources. When information may have changed, recommend verifying the latest information.
Step 5: Add Knowledge Files
You can provide files that your GPT can use as reference material.
Examples include:
- PDF guides
- Product documentation
- Company information
- Reference documents
- Internal notes
Knowledge files can make a GPT more useful for specialized tasks because they provide additional reference information.
Only upload files that you have permission to use and that are relevant to the GPT's purpose.
Step 6: Choose the Available Capabilities
Depending on your account and the current GPT editor options, you may be able to enable additional capabilities.
Only enable capabilities that are useful for the purpose of your GPT.
For example, a writing assistant may not need every available feature.
Step 7: Add Conversation Starters
Conversation starters are example prompts that users can click when they open your GPT.
For an SEO-focused GPT, you could use:
- Write an SEO article about AI automation
- Create a meta description for this article
- Suggest keywords for my website
- Improve this article for search intent
Good conversation starters make it easier for users to understand how your GPT should be used.
Step 8: Test Your Custom GPT
Do not save your GPT and immediately assume that everything works correctly.
Test it with several realistic prompts.
For example:
Write a 1,500-word article about AI automation for beginners.
Then try another request:
Create an SEO title and meta description for this topic.
Try different scenarios and check whether the GPT consistently follows your instructions.
Screenshot suggestion: Show the preview/testing area with a sample prompt and response.
Step 9: Improve the Instructions
If your GPT is not producing the results you expect, review the instructions.
Often, the problem is that the instructions are too vague.
Instead of:
Write good articles.
Try something more specific:
Write clear, original articles for beginners. Use short paragraphs, descriptive headings, practical examples, and avoid unnecessary repetition. Never invent statistics or sources.
Clear instructions make it easier to get consistent results.
Step 10: Save Your GPT
Once you have tested the GPT and are satisfied with the results, save or update it from the editor.
The sharing and publishing options available to you may depend on your ChatGPT plan and account settings.
Can You Share a Custom GPT?
Depending on your account and eligibility, you may be able to keep your GPT private, share it with others, share it through a link, or publish it publicly through available options.
Before sharing a GPT publicly, test it carefully and make sure its instructions and knowledge are appropriate.
Tips for Creating a Better Custom GPT
1. Give It One Clear Purpose
A GPT designed for one specific task is usually easier to configure and test than one that tries to do everything.
2. Write Detailed Instructions
Explain the desired behavior instead of simply telling the GPT to be helpful.
3. Give Examples
Examples can help show the GPT what a good response should look like.
4. Test Before Sharing
Try several real-world prompts before making your GPT available to other people.
5. Keep Knowledge Files Organized
Only upload documents that are directly relevant to your GPT's purpose.
Common Mistakes to Avoid
Making the Instructions Too Vague
Instructions such as Help me with anything do not define a clear purpose.
Adding Too Many Unrelated Tasks
A GPT that tries to be a writer, programmer, translator, marketer, analyst, and customer support agent at the same time can become harder to control.
Skipping Testing
Always test your GPT using different scenarios before relying on it.
Using Outdated Information
Review your uploaded knowledge files regularly and replace outdated information when necessary.
Frequently Asked Questions
Do I need ChatGPT Plus to create a custom GPT?
OpenAI's current documentation states that creating and editing GPTs is available to paid ChatGPT users. Availability can depend on the specific account or workspace.
Can I create a GPT on my phone?
The current GPT editor is available on the web. Mobile apps can use GPTs, but GPT creation and editing are handled through the web experience.
Can I upload files to my GPT?
Yes. GPTs can use uploaded knowledge files as additional reference material.
Can I share my custom GPT?
Depending on your account and eligibility, you may be able to keep it private, share it by link, or publish it publicly through the available options.
Can I change my GPT later?
Yes. You can return to the GPT editor and update the configuration and instructions later.
Final Thoughts
Creating a custom GPT is useful when you repeatedly use ChatGPT for the same type of task.
Instead of repeating the same instructions every time, you can create a dedicated GPT with a clear purpose, specific instructions, useful knowledge, and only the capabilities you actually need.
Start with one simple use case, test it with real prompts, and improve the instructions based on the results.
That approach can produce a much more useful custom GPT than trying to build one tool that does everything.
OpenAI Help Center – Creating and editing GPTs
