OpenAI's free version, ChatGPT Plus, offers powerful features that were previously reserved for paid subscribers, including web browsing and data analysis with GPT-4o mini. While some features have become available to everyone for free, such as general access to ChatGPT during peak times and the ability to create images with DALL·E 3, others like custom chatbots and advanced data analysis are still reserved for Plus subscribers. The subscription is worth it for its increased message limits, build-your-own-custom-chatGPT capabilities, and enhanced data analysis features, as well as access to new features as they're released. Additionally, ChatGPT Enterprise offers additional perks, including unlimited conversations using GPT-4, enterprise-grade security and privacy, and automation capabilities through Zapier.