While AutoCAD is for "CAD" (Computer-Aided Design), Blender is for "3D Art," but the lines blur. Blender is incredibly powerful for 3D modeling.
It is important to clarify one thing right away: AutoCAD is a proprietary, expensive software suite owned by Autodesk. autocad 3d free
This is the closest you will get to a "free AutoCAD" experience in terms of technical depth. It is a parametric 3D modeler. While AutoCAD is for "CAD" (Computer-Aided Design), Blender
You must verify your status through Autodesk Education using school documentation (like an ID card or transcript) once a year. This is the closest you will get to
Autodesk offers a of AutoCAD with full 3D capabilities. This is not a "free version"—it’s a time-limited test drive. After 30 days, the software locks you out unless you subscribe (around $1,775 per year or $235 per month at the time of writing).