LAD
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LAD (Language-Aided Designer)

A SolidWorks add-in to design with natural language using AI

Coming soon
Backed by Y Combinator
LAD background

Describe your design in plain language and LAD will translate it into SolidWorks operations, creating sketches, features, and assemblies all through natural conversation. LAD uses screenshots and the feature tree to understand your model's current state, verifying operations were completed correctly and correcting mistakes.

LAD next step sketch prediction showing preview geometry

Next Step Sketch Prediction

Our custom AI model that predicts what you're likely to draw next. The model supports lines (standard and construction), circles, arcs, rectangles, polygons, splines, and mirror operations.

LAD visual context with screenshots and feature tree analysis

Design from Documentation and Images

Provide documentation files, images, or examples of previous parts and assemblies, and LAD will intelligently read and use them.

LAD macro writing and execution

Write and Run Macros

LAD can write and run VBA macros for reproducibility and niche functionality not covered by standard LAD tools. When writing macros, LAD searches SolidWorks documentation and examples to better understand the API.

LAD complete SolidWorks API integration

Permissioning and Versioning

LAD stores checkpoints so you can revert unwanted changes, lets you control which commands run automatically, and uses rules you provide to guide the AI as it works.

Questions & Answers

  • LAD (Language-Aided Designer) is a system that integrates directly into SolidWorks as an Add-in and can create sketches, features, macros, and other CAD objects.

LAD Changelog

1.3.0

02-04-2026

Latest
  • Add next step sketch prediction system for lines, arcs, circles, rectangles, polygons, splines, and mirrors
  • Add settings to toggle the prediction display confidence threshold and number of predictions

1.2.1

01-20-2026

  • Add AI tools for surface modeling
  • Improve AI's ability to run macros
  • Add AI tools for mirroring features and creating linear and circular feature patterns
  • Download SolidWorks API documentation in the background so the AI can search it when writing macros
  • Remove infrequently used tools and parameters
  • Fix various geometry and AI tool bugs

1.1.0

01-11-2026

  • Add planning mode
  • Add macro writing/running
  • Detect and report sketch issues
  • Improve caching efficiency
  • Improve AI context and fix various bugs

1.0.0

01-05-2026

  • Release LAD
  • Add AI that translates natural language queries into SolidWorks actions
  • Support sketches, features, and assemblies
  • Permission tools per command
  • Add checkpoint reversion system
  • Add ability to read and search files and images
  • Add context management and conversation compression

Try LAD now.

Coming soon

© 2026 Lotas. All rights reserved.

SolidWorks is a registered trademark of Dassault Systèmes SolidWorks Corporation. Lotas is not affiliated with, endorsed by, or sponsored by Dassault Systèmes or SolidWorks. This AI assistant add-in is not made by, sponsored by, or endorsed by SolidWorks or Dassault Systèmes. All other trademarks are the property of their respective owners.