Nine new import/export file formats, more than 50 new compatibility enhancements, and more than 150 minor bug fixes. Also, the updated openNURBS libraries allow hundreds of other applications to read and write Rhino's native 3DM files.

• AcadSchemes - Create, save, export, and import AutoCAD export schemes.
• Revert - Discards all changes since the last time the file was saved.
• SendFile - Opens a new mail message with the current file as an attachment.

• AutoSave - The AutoSave folder is in each user's unique roaming application data folder.
• Save, SaveAs, and Export - An Options button has been added to the dialog box for file types that have export options.
• Import, Insert, and Open - An Options button has been added to the dialog box for file types that have import options.
• IncrementalSave - Save Small is the default.
• Insert - New Reference/Active Layer styles options control how Rhino manages layer names for linked blocks.
• Open -
  • It is possible to cancel when opening file that is locked.
  • A New dialogis used on Vista and Windows 7.
• Purge - Deletes empty groups, unused linetypes, dimension styles, and materials.
• SetWorkingDirectory - Allows creating a new folder.

• COLLADA -  .dae (digital asset exchange) files. (Windows only)
• EMF - Microsoft Enhanced Metafile Format files. (Windows only)
• GTS - GNU Triangulated Surface files.
• KMZ - Google Earth KMZ files. KMZ replaces the older KML format. (Windows only)
• PDF - Portable Document Format files.
• SKP export - SketchUp files.
• X3DV - Web3D Consortium X3D files. (Windows only)
• XAML - 3‑D meshes to an Extensible Application Markup Language file for SilverLight. (Windows only)

• 3DM import -
  • Rhino backup files (.3dm.bak and .3dmbak) can be opened directly.
  • If the 3DM file has no readable geometry, open is cancelled and an error message is printed on the command line.
• 3DM save -
  • The backup file extension has been changed from .3dm.bak. to 3dmbak.
  • By default a backup file is saved.
  • Warns when the disk is full and the file is not saved.
  • Files larger than 4GB are supported.
  • Double-precision meshes are supported.
  • Extrusion objects are supported.
  • On exit, prompt for a save no longer occurs when the only action has been a view change or a viewport move or resize.
  • New Save textures option on Save.
• 3DS import -
  • A new Options button has been added for Import.
  • The mask images are now created from the diffuse alpha channel and are put in the same folder as the 3DS file.
  • Enhanced support for complex transforms.
• DWG/DXF import -
  • Open, import, insert, reference, and attach AutoCAD version 2012 and previous files.
  • Support for AutoCAD paperspace entities as Rhino layout objects.
  • Enhanced support for AutoCAD dimension styles.
  • Enhanced support for 3‑D polylines.
  • Option to convert wide polylines to surfaces on import.
  • AutoCAD block attributes are supported as Rhino user text on import.
  • Support for double-precision meshes.
  • New nested layer options.
  • Images are imported as Rhino PictureFrame objects.
  • AutoCAD block definitions on layer 0 are set to ByParent on import.
  • Enhanced support for AutoCAD solids (ACIS data).
  • Unicode strings are used for layer, linetype, and dimension style names.
  • Vectorworks DXF objects flagged as closed polylines now have a closing segment added if there is none.
  • On insert, units now default to the current file units.
• DWG/DXF export -
  • Enhanced support for AutoCAD solids (ACIS data).
  • Nested layer names support.
  • Double-precision meshes support.
  • Color by RGB and Color by AutoCAD index support.
  • Pictureframe support.
  • Layout objects are saved as Paperspace entities.
• FBX export -
  • Support for NURBS curves, surfaces, and trimmed surfaces.
  • Support for V6 and V7.
  • Enhanced materials support.
• IGES export - A new Options button opens a dialog for setting the options.
• KML export - Exports to Version 2.1.
• LWO export - Supports both Version 5 or earlier (65,535 points max) and Version 6 or later (More than 65,535)
• LWO import - A new Options button opens a dialog for setting the options.
• OBJ import/export -
  • Options to remap Rhino Z to OBJ Y.
  • Vertex color import support.
  • Automatic repair attempted on import.
  • Weld/Unweld export option.
• PLY import - Ngon support on import.
• Points import - Import Leica Cyclone .pts files.
• SLC export - Mesh normals unified before exporting.
• SKP import -
  • Imports V8 files and embedded textures.
  • Weld option added.
• SOLIDWORKS import - Preview image support. (Windows only)
• STEP import/export -
  • Progress status messages on import.
  • Enhanced support for importing STEP files created by NX.
  • Option to export 2‑D parameter space trimming curves.
  • Option to export no object color when the Rhino object color is black.
  • Surfaces no longer shrunk on export.
• STL import -
  • Weld and Split options on import.
  • Units are now set and displayed on import.
• VRML export - Textures are now saved as decal_textures.

• Dozens of third-party import/export plug-ins add support for other formats. (Windows only)
• The openNURBS developer's toolkit now supports Rhino 5 (and earlier) native 3DM files. Other 2‑D and 3‑D CAD/CAM/CAE and graphic applications can read and write Rhino's 3DM files directly without Rhino. These development tools are free to all software developers.