Custom GPT
Definition
A Custom GPT is a customizable assistant within the ChatGPT environment.
A custom GPT combines reusable instructions, optionally provided knowledge and supported functions in ChatGPT. Creation and editing depend on the account and workspace. OpenAI has announced a replacement by plugins; existing GPTs can be used until the respective changeover.
Simply explained
Like your own assistant with a fixed topic and material.
Why it matters in practice
Helps people to use AI safely and sensibly in their own everyday work.
Example from business
Possible example: An eligible workspace team creates or maintains an internal assistant and tests access and response quality.
Limits and pitfalls
- Ignore current account and workspace rules, data approvals or the announced replacement.
Origin & history
Stand 09.10.2026: OpenAI announces the replacement of custom GPTs by plugins. For affected enterprise workspaces, the 11.12.2026 is planned; account and workspace messages are decisive for the concrete changeover.
Use in mid-sized companies
- Possible application: Check an existing internal question assistant and document its instructions, sources and accesses for the announced migration.
Frequently asked questions
What Does Custom GPT Mean?
A Custom GPT is a customizable assistant within the ChatGPT environment.
What errors should be avoided?
Ignore current account and workspace rules, data approvals or the announced replacement.
Sources
- Creating and editing GPTs; aktuelle Verfügbarkeit und geplante Ablösung · OpenAI, Creating and editing GPTs; aktuelle Verfügbarkeit und geplante Ablösung
Sources checked on 10/09/2026. Editorial application examples are hypothetical; no proof of real customer results.
Editorially reviewed on: