Quick answer: A custom GPT is a version of ChatGPT set up with your own instructions and, optionally, reference files, so it behaves like a specialist assistant. In 2026 this area is changing: one October report says OpenAI plans to retire custom GPTs and migrate them to plugins. Check OpenAI’s help center before you invest time.
Why the Feature Matters
People built custom GPTs for tasks such as answering product questions, drafting in a particular style, preparing for interviews and tutoring. Instead of repeating the same instructions every chat, you set them up once.
What Is Changing
A October 2026 roundup by MemoryPlugin reports that OpenAI plans to retire custom GPTs across its plans and provide a migration path to plugins. According to that report, only Enterprise had published dates so far: no new GPTs after October 26 and retirement on December 11. This is a secondary source, and plans may change, so confirm current details in OpenAI’s own announcements before relying on custom GPTs for important work.
How Custom Assistants Are Usually Built
- Define the job. One clear purpose, such as “help new customers choose a plan.”
- Write instructions. Role, tone, what to do, what never to do and how to handle questions it cannot answer.
- Add knowledge. Upload approved documents or FAQs, if supported.
- Test it. Try normal, tricky and off-topic questions.
- Refine and document. Save your instructions somewhere safe so you can move them if a feature changes.
- Share carefully. Decide who can use it and what information it can see.
A Starter Instruction Template
“You are a helpful assistant for [business]. Answer only using the provided information. If you do not know, say so and suggest contacting [contact]. Be friendly, brief and clear. Never give legal, medical or financial advice. Never ask for passwords or payment details.”
Alternatives if Custom GPTs Go Away
- Projects or saved instructions: some AI tools let you keep instructions and files together for a topic.
- Other assistants: several providers offer comparable custom assistant features.
- Website chatbots: dedicated chatbot platforms for customer-facing use.
- Prompt library: a shared document of tested prompts works in any tool.
If Customers Will Use It
A public chatbot brings legal and reputation risks. Be clear it is automated, give an easy route to a human, and avoid sensitive topics. Read what businesses using chatbots should do and our AI receptionist guide.
Privacy and Data
- Only upload information you are allowed to share.
- Remove personal data and confidential material.
- Understand how files and chats are stored. Read data privacy and AI.
Frequently Asked Questions
Are custom GPTs being shut down?
Reports say OpenAI plans to retire them and migrate users to plugins. Verify the latest status with OpenAI.
Do I need to code to build one?
No. They were designed to be built with plain-language instructions.
Can I earn money from one?
Possibly in the past, but program rules change. Check current terms before planning around income.
Product features and policies change quickly. This article reflects reporting available in October 2026.
