gNucleus

What is gNucleus?

gNucleus is a generative AI platform designed for mechanical design, industrial engineering, and simulation tasks. It can create editable CAD parts and assemblies from text, images, PDFs, DXF files, and engineering data.

The platform’s scope has expanded from being a simple tool for converting text to CAD format to a comprehensive engineering AI solution that covers data annotation, model training, design standards, CAD operations, simulation, and optimization. Individual users can use it online, while companies can opt for customized models and deployment on private clouds.

Main functions

Text to CAD

• Users can describe the dimensions, structure, and constraints of parts in natural language to generate 3D CAD models.
• The results include the design parameters and modeling history, facilitating further modifications in CAD software.
• English prompts are usually more stable, but the official MCP project also supports multiple languages such as Chinese for input.

Convert images and drawings to CAD

• PNG, JPG, PDF, and DXF files can be converted into editable 2D sketches or 3D solids.
• It is suitable for digitizing old drawings, restoring the contours of parts, and creating initial parameter models.
• Vague dimensions, missing views, and complex surfaces still require engineers to add additional constraints and conduct further reviews.

Parametric parts and assemblies

• It supports the creation of CAD parts from text, including parameters and a history of changes.
• The assembly functionality supports both top-down and bottom-up design approaches.
• The system can generate components and fitting constraints for constructing mechanical assembly structures.

Multiple CAD export formats

• The individual plan supports formats such as SolidWorks, FreeCAD, STEP, IGES, and STL.
• The Premium plan also includes export to CATIA, while the enterprise plan covers more systems based on B-rep.
• Different formats retain varying amounts of information; the generic exchange format usually does not include the complete modeling history.

Engineering AI Agent

• The design specification agent can organize key parameters and engineering constraints, as well as provide verification information.
• The CAD Agent is responsible for creating parts and assemblies, while the simulation Agent can be integrated with major CAE workflows.
• The optimized Agent is capable of interpreting the simulation results and providing suggestions for improvement.
• The company page lists the capabilities for simulation workflows with tools such as Ansys and Altair; actual integration requires separate verification.

Model training and private deployment

• Companies can use their own CAD and simulation data to fine-tune the models.
• The platform supports customized services such as direct fine-tuning, lightweight fine-tuning, and reinforcement learning.
• The model can be hosted via managed services or deployed in an enterprise private cloud to meet security and compliance requirements.

Which users are it suitable for

• Mechanical engineer: Quickly create parametric parts, assemblies, and design drafts.
• Industrial design team: Creates editable models from conceptual text and reference images.
• Manufacturing companies: Digitize old drawings and integrate them with existing CAD workflows.
• Simulation engineer: Preparation of automated models, execution of simulations, and optimization of results.
• AI team: Trains specialized generation models for enterprise engineering data.
• Developer: Integrate the text-to-CAD capability via API or MCP into smart assistants.

gNucleus price

The following are the monthly subscription options for individual users as of August 28, 2026. For enterprise data services, model training, dedicated APIs, and private deployments, quotes will be provided upon contacting sales.

Unused monthly points will expire after one month. Prices, bonus points, taxes, and the range of supported services may change; it is necessary to refer to the account details and the final quote before placing an order.

How are points consumed?

• A CAD model can be successfully created through chatting at a public price of 5 points; no fee is charged for failed attempts.
• Downloading CAD parts with parameters usually costs 10 to 20 credits.
• Downloading parameterless parts in formats such as STEP, IGES, STL, or GLB costs 10 credits.
• Downloading an assembly with parameters costs 100 points, while downloading an assembly without parameters costs 50 points.
• The specific fees may vary depending on the model, tasks, and product rules; it is advisable to conduct small-scale tests before using it in bulk.

How to use gNucleus

1. Register an account to view free points, models, and export permissions.
2. Choose Text to CAD, Image to CAD, or Assembly Generation tool.
3. Specify the unit, dimensions, structure, hole locations, material, and engineering constraints.
4. When uploading the reference drawings, make sure that the views, annotations, and outlines are clear.
5. After it is generated, rotate and scale it in the 3D viewer to check the design specifications.
6. Check the parameters, feature history, coordination relationships, and geometric integrity.
7. Select the target CAD format, confirm the amount of points that will be used, and then download it.
8. Perform engineering verification and modifications in SolidWorks, CATIA, or FreeCAD.

API and MCP integration

• gNucleus provides API Keys for both personal and corporate accounts, which are used to invoke generation capabilities.
• The official Text-To-CAD MCP server enables tools for converting text into parts and assemblies to be connected to the MCP client.
• The MCP project is licensed under the MIT license and requires Python 3.7 or a higher version.
• The MCP documentation for new developer accounts specifies 200 free API credits.
• The link for sharing the model will become invalid after 24 hours; the official documents should be downloaded by logging into the platform.
• The open-source nature of the MCP connector does not mean that the gNucleus platform, the training data, or the generated models are also open source.

Product advantages

• The generated results emphasize parameterization and editability, making them more in line with engineering CAD workflows.
• It covers parts, assembly, drawing conversion, simulation, and optimization at the same time.
• It supports a variety of native CAD formats as well as common exchange formats.
• It offers multiple access methods such as APIs, MCP, model fine-tuning, and private clouds.
• The free plan can be used to test the basic generation and export processes.

Usage restrictions and precautions

• Generation models cannot be considered as direct manufacturing results; dimensions, tolerances, materials, and strength must be verified by engineers.
• Complex surfaces, assembly interference, missing features, and incorrect constraints can prevent the model from being edited properly.
• The generic format does not necessarily retain parameters and modeling history; the correct file type should be selected before downloading.
• Before uploading corporate drawings and proprietary designs, it is necessary to assess data permissions, confidentiality, and deployment methods.
• The prompts on the page for subscription upgrades and cancellations suggest that it may be necessary to contact support; the actual process should be confirmed before making a payment.
• The platform itself is not a fully open-source project; the public repository contains mainly MCP connectors and validation tools.

Frequently Asked Questions

Can gNucleus be used for free?

Yes. The Basic plan provides 100 points per month, and the homepage of the official website also shows the points available as a result of trials and social activities.

Can gNucleus generate editable CAD?

Yes. The platform emphasizes parametric models and a complete modeling history, but the degree of editability depends on the scheme, the quality of the output, and the export format.

Which CAD formats are supported?

The individual plan includes SolidWorks, FreeCAD, STEP, IGES, and STL; the Premium version adds CATIA, while enterprise-level options require separate confirmation.

Does gNucleus provide APIs and MCP?

Available. The account allows for the generation of API keys, and the developers have also made available a Text-To-CAD MCP server for connecting with smart assistants that support MCP.

Is gNucleus an open-source platform?

It is not a fully open-source platform. The company has made available projects such as the MCP connector under the MIT license, but the core services and models remain proprietary products.