Closed Source AI
AI models where the underlying code is kept secret and owned by a company, usually accessed by users through a paid service.
In Plain English
Closed source AI is like a highly guarded secret recipe, such as the formula for Coca-Cola. You can buy and enjoy the product, but the company will not show you exactly how it is made. Companies do this to protect their business interests and to prevent people from tampering with the AI's safety rules. ChatGPT is a closed-source system; you can use it, but you cannot see its inner workings.
Real-World Example
Paying a monthly subscription to use OpenAI's GPT-4 without having access to the code that makes it run.