I checked recently - my free Gemini version still works, but yeah, it comes with limitations. Looks like Google split it this way: the basic model is available to everyone for free, while the Pro version requires a paid subscription (they used to include it with Google One). Pro differs in speed, the ability to work with images and files, and it's generally smarter at handling complex tasks. If you're getting by fine with the free version, no need to change anything, but if you need serious capabilities - you'll either have to pay or look for alternatives like ChatGPT or Claude.