No, CGI and 3D are not the same.
CGI, or computer-generated imagery, is a term used to describe the process of creating images or animations using computer software. This can be used to create anything from photorealistic images to stylized animations.
3D, on the other hand, refers to the three-dimensional world that we live in. While CGI can be used to create images and animations that look 3D, it is not the same as the actual world around us.