The most surprising part of their announcement isn’t how great the model is. The shocking part is that they are allowing everyone to use it for free. What is OpenAI thinking? 
The majority of their…

AI in Plain English

OpenAI has launched GPT-4o for free with the aim of achieving mass adoption, competing with other models, collecting more data for training future models, countering the scorched earth theory, and driving network effects. They may also have even better products coming soon.

Why is GPT-4o Free? OpenAI’s Master Plan

If it’s free, it means you’re the product.

Because version 5 is around the corner and it will be paid

They should pay us for collecting data from us

There is nothing called “Free”. This time you are the product. More specifically, they are collecting our personal data to improve the AI model.