What are custom GPTs and how do they work?

Custom GPTs are tailored versions of ChatGPT that are configured for a specific purpose, style, or workflow. Instead of starting from a blank prompt every time, a custom GPT can be set up with its own instructions, personality, knowledge sources, and sometimes tools. The goal is to make it behave more consistently for a particular task, such as writing in a brand voice, helping with customer support, tutoring on a subject, or assisting with internal company processes. They work by combining the underlying language model with extra guidance. The creator defines instructions that shape how the GPT responds, what it should prioritize, what it should avoid, and how it should handle certain situations. Some custom GPTs can also be given files or reference materials so they can answer in a way that reflects those documents. Depending on the setup, they may be able to use tools for things like web browsing, image generation, or other connected actions. In practice, a person opens the custom GPT and asks a question just as they would with standard ChatGPT, but the responses are influenced by the custom setup. If the instructions are well written, the GPT feels specialized and more reliable for its intended use. Custom GPTs are useful when someone wants repeatable behavior without needing to rewrite the same prompt every time. They are especially helpful for teams, educators, and creators who want a guided assistant for a narrow job. If you want to know whether a specific custom GPT can do something, the current page usually shows its description, capabilities, and any contact or support information if available.