How to Connect Gemini to Revit: Antigravity, Revit MCP and a Real Test

To connect Gemini to Revit, install Autodesk’s Revit MCP Server add-on for Revit 2027.2 and register it as a local MCP server in Google Antigravity, Google’s agent app and command line tool, by adding the server’s .exe to Antigravity’s mcp_config.json on the same Windows PC. Gemini can then read your model, list rooms and elements, open views and, with the write tools, change it. It does not work from gemini.google.com or the Gemini phone app, Autodesk does not document Gemini by name, and for Revit 2022 to 2026 you need a community server instead. We gave Gemini the same Revit model and brief as Claude and ChatGPT: Gemini 4 Argon got the numbers right for about 29 cents and missed two things the other two caught.

I run MeltFlex, an AI rendering tool for architects and interior designers, and this is the third Revit guide in our series, after Claude and Revit and ChatGPT and Revit. On October 30, 2026 I re-read Autodesk’s Revit MCP documentation, Google’s Antigravity docs and the source pages of the main community servers, then ran Gemini on the same test as the other two. One limit up front: Revit only runs on Windows and I work on a Mac, so I did not drive a live Revit session with Gemini. The setup below is assembled from Autodesk’s and Google’s own instructions, and I say where a step is documented and where it is inferred.

The two products. The Gemini web app cannot reach Revit; the connection runs through Antigravity on the Revit PC.

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Can Gemini connect to Revit?

Yes, through any Gemini client that can start a local MCP server on the Revit PC. Every Revit MCP server we found, Autodesk’s included, runs next to Revit and talks over stdio, which rules out anything that only lives in a browser. That leaves three working routes and one that does not work:

Autodesk’s own wording is what makes the first three legitimate. Its overview lists the supported AI clients as “Claude Desktop, Cursor, and other AI clients that support local MCP servers”, and its setup page adds that “the same configuration pattern generally applies to other AI clients that support local MCP servers.” Antigravity, Gemini CLI and VS Code all are. None of them has a Gemini page from Autodesk, though, so you are following the generic pattern, not a tested recipe.

Autodesk’s overview, captured October 30, 2026: a local stdio server, Revit 2027.2 only, and “other AI clients that support local MCP servers”.

What do you need before you connect Gemini to Revit?

• Revit 2027.2 on 64-bit Windows 11 for Autodesk’s server, which is a Technical Preview and supported on that one update only. Revit 2022 to 2026 needs a community server (below).
• The add-on: Revit 2027 MCP Server Read-Tools, Write-Tools or Experimental-Tools Technical Preview, downloaded from your Autodesk Account under your Revit 2027 product updates. Start with Read-Tools.
• A Gemini client on the same PC: Antigravity for most people. Gemini 3.8 Flash is on every Antigravity plan, Gemini 4 Argon on paid Google AI Pro and Ultra and on Enterprise.
• A model open in Revit while you work. The server talks to the running Revit session, not to files on disk.

How to connect Gemini to Revit with Antigravity, step by step

1. Update Revit to 2027.2 and install the Read-Tools add-on from your Autodesk Account.
2. Install Antigravity on the same PC. For the command line version, run this in PowerShell, then sign in with your Google account:

   irm https://antigravity.google/cli/install.ps1 | iex

3. Open the MCP config. Antigravity reads %USERPROFILE%\.gemini\config\mcp_config.json for all projects, or .agents\mcp_config.json inside one project folder. Create the file if it does not exist.
4. Add Revit. Paste the server entry below. The path and the argument are Autodesk’s own, from its Claude Desktop example; timeoutSeconds is Antigravity’s per-server setting, raised because Revit calls on a big model can outlast the default:

   {
     "mcpServers": {
       "revit": {
         "command": "C:\\Program Files\\Autodesk\\Revit 2027 MCP Server Read-Tools Technical Preview\\Autodesk.RevitMcpServer.Stdio.exe",
         "args": ["--ManageConfigurationWithAutodeskRevitPluginInstaller=true"],
         "timeoutSeconds": 600
       }
     }
   }

5. Test it. Open a model in Revit, restart Antigravity, type /mcp and check that revit shows as connected. Then ask “list the Revit MCP tools you can use”. Antigravity runs new tools in Ask mode, so approve the call when it asks.

Autodesk’s setup page. The prerequisites are the same for Gemini; only the config file changes.

If the server does not start: Autodesk warns that some clients do not like spaces in the path, and gives a PowerShell line that returns the Windows short path of the install folder. Swap that into command and restart. Two other things to check: the JSON needs double backslashes, and Revit has to be running with a model open before the server can do anything. For Write-Tools or Experimental-Tools, the folder name in the path changes to match.

Antigravity’s MCP docs: the two config locations and a local server entry with command and args.

Which Revit MCP server should you use with Gemini?

Autodesk’s, if you are on Revit 2027.2. Otherwise one of the community servers, all of which are standard stdio servers that Antigravity can start. None of them documents Gemini or Antigravity by name as of October 30, 2026; the closest is AEC Model Bridge, whose README says Gemini CLI “should work too”.

The only Gemini mention we found in a Revit server’s docs, captured October 30, 2026: “should work too”, not tested.

For a community server the Antigravity entry has the same shape, only the command changes to that server’s executable. rvt-mcp, for example, documents its server at %LOCALAPPDATA%\Bimwright\rvt-mcp\server\current\rvt-mcp.exe. Horizun’s client page says it plainly: for other stdio clients, register the installed server’s full path. Our Claude to Revit guide compares these servers in more depth, including which ones listen on the network.

rvt-mcp, the community server with the widest Revit version range.

Can you use Gemini CLI or GitHub Copilot instead?

Gemini CLI, only with an API key. Google stopped serving free, Pro and Ultra accounts in Gemini CLI on June 18, 2026 and moved them to Antigravity. Paid Gemini API keys and Gemini Code Assist still work, so if your office already pays per token, Gemini CLI reads MCP servers from %USERPROFILE%\.gemini\settings.json in the same shape, with timeout in milliseconds:

{
  "mcpServers": {
    "revit": {
      "command": "C:\\Program Files\\Autodesk\\Revit 2027 MCP Server Read-Tools Technical Preview\\Autodesk.RevitMcpServer.Stdio.exe",
      "args": ["--ManageConfigurationWithAutodeskRevitPluginInstaller=true"],
      "timeout": 600000
    }
  }
}

GitHub Copilot in VS Code, if you already pay for Copilot. GitHub’s model list shows Gemini 4 Argon and Gemini 3.8 Flash as generally available, and several Revit servers, AEC Model Bridge among them, document VS Code setup. You add the server to VS Code’s MCP config, pick a Gemini model in Copilot Chat, and work in agent mode. This is also the route in the video below, where Gemini is one of the models in Copilot’s picker rather than Google’s own app.

GitHub’s supported models page, captured October 30, 2026: both current Gemini models are GA in Copilot.

We tested Gemini on the same Revit model as Claude and ChatGPT

For the Claude and ChatGPT guides we used the same job: an interior designer receives client-duplex.ifc, buildingSMART’s public Duplex model exported from Revit, and asks for a Unit A room schedule, the furniture already modeled in each room, whether both bedrooms can take a king bed with 760 mm on each side and 900 mm at the foot, and a to-scale plan for a renderer. We had checked every answer with our own ifcopenshell scripts.

On October 30, 2026 we sent Gemini 4 Argon and Gemini 3.8 Flash the same brief through the Gemini API, asking for one Python script, because without a live Revit or an agent we could let run unattended, that is the closest fair test. I read each script before running it (it only imported ifcopenshell, shapely, matplotlib and the standard library, and wrote only a CSV and a PNG), ran it, and pasted the error back once. Both failed on the first run: Argon with a Python indentation error, Flash by asking for IfcFurniture, an entity that does not exist in this file’s IFC2X3 schema. Both scripts ran after one fix.

Honest take: Argon is the real result here. It read the same file as Claude and ChatGPT, landed on the same areas, the same 31 pieces of furniture and nearly the same clear room size (3708 by 5713 mm against ChatGPT’s 3708 by 5709), and its furniture list named each bed’s size, a king in Bedroom 1 and a queen in Bedroom 2, which is what a furnishing proposal needs. Its weakness is confidence. It checked the bed against an empty rectangle instead of placing it, so it never saw that the bed already in Bedroom 1 sits 700 mm from the wall, and it told us the room areas matched the floor footprints when the footprints are about 22 m² against Revit’s 26. That is exactly the kind of mistake that ends up in a client proposal. Flash was fast and cheap and not usable for this job. The comparison is not perfectly even: Claude and ChatGPT ran as agents that executed and checked their own code, while Gemini wrote a script and I ran it, which is why its times and costs are so much lower.

Is it safe to let Gemini change a Revit model?

Start read only, and keep Antigravity asking. Autodesk splits its server into Read-Tools, which cannot modify the model, and Write-Tools and Experimental-Tools, which can; its page tells you to review proposed changes and back up the model before write operations. Antigravity runs new MCP tools in Ask mode by default, so you approve every call, which is the right setting for a project file. On the community side, read what a server can do before you connect it: rvt-mcp turns on its code tool by default, and several servers can run arbitrary code inside Revit, which is powerful and exactly as risky as it sounds.

Gemini, Claude or ChatGPT: which is best for Revit?

If you already live in Google’s tools, Gemini is a reasonable Revit assistant now, as long as you treat its confident summaries as a first draft. If you are choosing from scratch, Claude is still the easiest start because Autodesk documents it. For the wider picture of what each assistant connects to, see our lists of Gemini extensions for architects, ChatGPT plugins for architects and MCP servers for architects in Claude Code.

What can’t Gemini do in Revit yet?

It cannot work from the Gemini app, it has no setup page from Autodesk, and on anything older than Revit 2027.2 it depends on community servers that do not test Gemini. It also cannot fix the problem every assistant had in our test: the plan it draws for a renderer leaves out the kitchen cabinets unless you ask for casework by name. To start a building from a brief rather than edit one, AIBIMTool, the AI BIM software made by our team, generates a first model and exports IFC for Revit. And when the plan is ready to show a client, our floor plan to 3D converter turns it into a furnished 3D view, and AI interior design restyles a photo of the finished room. If you render from the Revit model itself, our comparison of AI architectural rendering tools covers the options, and AutoCAD MCP servers are the same idea for 2D drawings.

How we tested and what we read

The test is first hand: the brief, the public buildingSMART Duplex IFC (exported from Revit, CC BY 4.0) and the reference answers are the ones from our Claude and ChatGPT Revit guides; Gemini 4 Argon and Gemini 3.8 Flash ran through the Gemini API on October 30, 2026 with ifcopenshell 0.9, costs at Google’s published API prices that day. We did not connect Gemini to a live Revit session, because Revit needs Windows. Screenshots are from each source’s public page, captured October 30, 2026. Sources, read that day: Autodesk’s Revit Public MCP Server overview and setup page; Autodesk’s June 17, 2026 announcement; Google’s Antigravity MCP docs and Gemini API pricing; GitHub’s Copilot supported models; and the rvt-mcp, Horizun and AEC Model Bridge repositories.

We will update this guide when Autodesk’s server leaves Technical Preview or documents a Gemini client, and when Gemini 4 Argon’s API price changes on December 1.

Connect Gemini to Revit: FAQ

Keep reading

• How to connect Claude to Revit, with the deepest comparison of Revit MCP servers.
• How to connect ChatGPT to Revit, the same test run with GPT-6 Astra.
• How to connect Gemini to Rhino, the same Antigravity setup for McNeel’s server.
• How to connect Gemini to SketchUp, four routes that work.
• Gemini extensions for architects and interior designers, everything else worth connecting to Gemini.
• Best BIM software, if you are still choosing the tool itself.