gNucleus AI publishes Parametric CAD Bench v3 for AI agents that author parametric CAD

gNucleus AI publishes the paper for Parametric CAD Bench v3, which grades AI agents on parametric design intent, modelling-history preservation and feature-level editability, not only on whether a generated 3D model looks right. It has 100 real-world-inspired tasks in three workflows: text-to-CAD creation, text-to-CAD create-and-edit, and image-to-CAD from engineering drawings. The paper reports a snapshot of 13 model-agent systems as of 24 September 2026; according to a company author, Claude Code with Opus 5.5 leads with an overall 61.03% and 84.66% on image-to-CAD. The benchmark, leaderboard and trajectories were released in September.

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