Meanwhile, GPT-4.1 mini will replace GPT-4o mini in ChatGPT for all users, including the free ones. According to OpenAI’s model release notes , GPT-4o will still be the default model for free users.

There’s a free tier based on GPT 3.5 which is powerful, but lacks advanced features such as file uploads, custom GPTs, web access, and more. Then, there’s a paid tier that uses the latest ...