LTspice 26.1.1.2

What's new in 26.1.1.2

New Features
9/20/26 LTspice 26.1.1
MCP enhancements
8/3/26 LTspice 26.1.0
Add MCP server for use with third-party AI tools
Bug fixes
5/6/26 LTspice 26.0.2
Automatically scale tiled subwindows when the main LTspice window is resized
Performance improvement
Add keyboard shortcuts for current source (I), Save As (Ctrl+Shift+S) and Close file (Ctrl+W)
Warn if M suffix is used for frequency or resistance, or if F suffix is used for capacitance, in common GUI fields
Enable FRA Bode-specific plot settings file load/save with default filename .fra_*.plt
Make filename optional for .loadstate and .savestate directives
If loadstate is specified without a filename, and no default file is found, sim starts from t=0 with a warning
Warn if a schematic is opened from within a ZIP archive
Remove "Directory for Temporary Files" field from Settings > Operation.
- This was only used for temp installation files, etc. Raw file directory remains under Settings > Waveforms
Add "Improving Convergence" document to Help > LTspice Help > F.A.Q.
Bug fixes
12/1/2025 LTspice 26.0.1
Bug fixes
12/1/2025 LTspice 26.0.0
Parallel release on MacOS and Windows
Add support for ARM processors
Improved convergence
Add support for loadstate/savestate/convreport defined as part of .tran analysis directive
When editing a schematic, automatically start wiring if an unconnected pin is left-clicked
Indicate default series resistance of 1mOhm when editing inductors on a schematic
- Remove Settings > Hacks > Always default inductors to Rser=0
- To use default Rser=0 for all inductors, add ".options thev_induc=1" to the circuit
Symbols autogenerated from .subckt's only include ModelFile base file name, not full path
Add schematic menu action Hierarchy > Generate Subckt Netlist
- Optionally use a symbol of the same name to define the subckt port order
Add unicode support for file paths in GUI menus/dialogs stored in .ini settings file
Improve display of recent files in File menu, show full path in status bar when hovered
Add log warning for extreme value capacitors (>1kF) regarding default parallel resistance
Change default value for waveform compression to disabled (Settings > Compression)
Bug fixes
9/4/25 LTspice 24.1.10
Improved step legend behavior in waveform viewer
Relaxed requirements for PWL files for independent sources
- Automatically fall back to "PWL SCOPEDATA=..." behavior if the data is nonmonotonic. A warning is put in the log.
Added a SCOPEDATA choice to the voltage/current source dialog. …