AU API Wishes and Revit 2025.3
Originally Published inAU is over and Revit 2025.3 has been released:
Revit 2025.3
Revit 2025.3 has been released. An overview of the new features is provided by The Factory in What’s new and improved in Revit 2025.3 ↗. Highlights at a glance:
- Productivity enhancements for documentation production
- Performance and user experience improvements, including your UI readability feedback
- Export ceiling grids to IFC
- Modernized UI for load cases and combinations
- Rebar group sets when exporting to IFC
- Duplicate layers for system families
- Add-in manager
- Background PDF export initialization dialog
- In-context spell check
- New updates for Autodesk Insight, including direct data exchange for more automation in AIA2030 reporting
- Recentre room reference lines and room tags
Of special interest to users and developers alike, the updated Add-In Manager enables you to identify all installed add-ins for each version of Revit, simply enable or disable individual add-ins before opening Revit and provides more visibility on critical insights like the load time of each add-in so that you can make easy and informed decisions about which add-ins may be reducing the time for you to get to work in Revit:

Revit 2025.3 SDK
The Revit SDK has been updated for Revit 2025.3, and the new version is available from the Revit developer page ↗.
I compared the Revit 2025 SDK with the new version and created a list of differing files. Note the following new files:
- ./Samples/AnalysisVisualizationFramework/DistanceToSurfaces/CS/
- Command.cs
- DistanceToSurfaces.addin
- DistanceToSurfaces.csproj
- ReadMe_DistanceToSurfaces.rtf
- ./Samples/ExternalResourceServer/ExternalResourceDBServer/CS/
- ServerInterfaceExtensionsForRevitLinks.cs
- ./Samples/Massing/DividedSurfaceByIntersects/CS/
- Command.cs
- DividedSurfaceByIntersects.addin
- DividedSurfaceByIntersects.csproj
- Properties/AssemblyInfo.cs
- ReadMe_DividedSurfaceByIntersects.rtf
- ./Structural Analysis SDK/Examples/Concrete/CodeCheckingConcreteExample/
- Concrete/InternalForcesSurface.cs
- Main/Calculation/SurfaceSection.cs
- Main/ResultSurfaceElement.cs
- Server/ServerResultsSurface.cs
- Utility/ResultInPointSurface.cs
So, we seem to have gained a new external command or two and some other enhancements.
Boost Your BIM AU API Wishes
Once again, Harry Mattison of Boost Your BIM ↗ fulfilled several AU API wishes that you might want to check out:
Many thanks to Harry for sharing these and once again proving that a lot can be achieved with the Revit API.
Claude Computer Use Does Stuff
Anthropic announced computer use, a new Claude 3.5 Sonnet, and Claude 3.5 Haiku ↗.
To understand what this can mean, watch the two-minute video on Claude computer use for automating operations ↗:
It is already generating quite a stir in social media and the Internet in general ↗.
For more details, check out the Claude documentation on computer use (beta) ↗.