Turn the model over
Ask for a part and it opens as a 3D model in the chat. Drag to rotate, switch views, and tip it over to check the bottom before anything prints.
Kiln in ChatGPT
Let ChatGPT run your 3D printer.
Kiln gives ChatGPT what it needs to design a part, check it will print, and run it on your own printer. You approve every print.
It opens right in the chat
Kiln shows its work as a panel inside the conversation, so you see what ChatGPT made before anything prints.
A check before it prints
Kiln checks the part will print and says what is likely to go wrong. It flagged the stand’s first hanger for overhangs, and ChatGPT told us so instead of calling it done.
Fix it in plain words
Say what to change and the new version opens in 3D in the next reply. One “fix the hanger so it prints without supports” and Kiln found no overhangs left.
Where a panel can’t show, Kiln hands back a link that opens the same 3D view in your browser. Starting and watching a print needs Kiln installed on the computer next to your printer.
An example conversation
Design a headphone stand with a twisted column and a curved hanger that prints without supports, and show it to me in 3D.
The stand opens in 3D in the chat
Here it is. Kiln’s check flagged overhangs on the hanger, so it isn’t support-free yet. I’d refine the hanger before printing.
Fix the hanger so it prints without supports.
The new version opens in 3D
Done. The hanger now slopes up, and Kiln finds no overhangs left. Check the sliced preview before a full print.
What Kiln adds
ChatGPT can write the code. Kiln turns it into a part.
The same job both ways, from a description to a part on your printer.
| Step | ChatGPT on its own | ChatGPT with Kiln |
|---|---|---|
| Make it | Writes CAD code. Seeing the shape takes a CAD program on your computer. | Kiln builds the model and opens it in 3D right in the chat. |
| Check it | A problem shows up in the slicer, or partway through the print. | Kiln checks overhangs, thin walls, warping risk, and whether it fits your printer, before anything prints. |
| Change it | Ask again and get new code. Keeping track of which version was better is on you. | Ask for a change in the same chat, and Kiln keeps every try tied to what you first asked for. Pro makes it Git for 3D: what changed, drawn on the part, and a branch for the risky idea. |
| Slice it | Export the file, open your slicer, and pick the settings. | Kiln slices it in the slicer you already have: PrusaSlicer, OrcaSlicer, or Bambu Studio.Kiln on your computer |
| Print it | Send the file to your printer yourself. | ChatGPT sends it to your printer, and it starts only after you say yes.Kiln on your computer |
| Watch it | Check on it in the printer’s own app. | Kiln watches every print it starts and stops it if a heater fails. A live monitor opens in the chat with the camera, progress, and pause and stop, and ChatGPT checks the camera picture when you ask.Kiln on your computer |
| No printer? | Find a print shop, upload the file, and wait for a quote. | Ask for a price, and Kiln shows what it costs printed and shipped to you. |
| More printers | You run each one yourself. | Business runs several at once and picks the printer for each job. Free and Pro drive one at a time. |
Steps marked “Kiln on your computer” need Kiln installed on the computer next to your printer. The camera shows when your printer has one. A print can still fail, with Kiln or without it; Kiln catches what it can see before the print starts, and asks before it uses your plastic.
Set it up
Two minutes on chatgpt.com. Nothing to install until you want your own printer in the loop.
Add Kiln as a plugin
On chatgpt.com, open Plugins, choose Add, then Add custom MCP server. Name it Kiln, paste Kiln’s address, and leave sign-in set to OAuth.
https://api.kiln3d.com/mcpSign in to Kiln
Tick ChatGPT’s box to continue and choose Create as a plugin. Kiln’s sign-in opens: sign in or make a free account, and Kiln shows as installed. How the connector works.
Pick Kiln and ask
In a chat, type @ and pick Kiln, then describe a part. Kiln designs it, checks it will print, and opens it in 3D right there. Pick Kiln again with each new request.
To print, add your printer
Install Kiln on the computer next to your printer. ChatGPT can then send a print to it, and you approve every one. Install Kiln. See the printers Kiln works with.
Before it prints, Kiln asks you
A print uses real plastic on a real machine, so ChatGPT can’t start one alone. Kiln shows you the model, then waits for your yes in an approval prompt. You can say yes to one printer for a while so it stops asking, and end that whenever you like.
Questions
Can ChatGPT 3D print?
Yes, with Kiln. Describe a part in ChatGPT; Kiln designs it, checks it will print, and opens it as a 3D model right in the conversation. To print, install Kiln on the computer next to your printer; ChatGPT then sends the print there and you approve it. Tested in ChatGPT on the web.
Can ChatGPT make 3D models?
Yes. With Kiln connected, ChatGPT turns a plain description into a real 3D model you can turn over, measure and change in the same chat, then print or download. No CAD skills needed.
What does Kiln add to ChatGPT?
ChatGPT can write the code for a 3D model. Kiln builds it, opens it in 3D right in the chat, checks it will print (overhangs, thin walls, warping, and whether it fits your printer), slices it in your own slicer, and sends it to your printer after you say yes.
Which model works best with Kiln in ChatGPT?
The most capable one your plan offers. In ChatGPT’s model menu, choose GPT-6 at High or Extra High thinking, or GPT-6 Pro (powered by GPT-6 Astra) if your plan includes it. Kiln does the checking and the printing; the model does the thinking, so a stronger model means better designs and fewer retries.
How do I connect ChatGPT to my 3D printer?
Add Kiln inside ChatGPT by its address, https://api.kiln3d.com/mcp, and sign in. Nothing to install. The setup steps on this page take a few minutes.
Do I need a 3D printer?
No. With the plugin, ChatGPT can design a part and check it will print without one. You need a printer, or someone else’s, to make it.
Does it work in the ChatGPT phone and desktop apps?
We tested it on chatgpt.com in a browser, and that is where you add Kiln: OpenAI lets you connect a server like Kiln on the web only.
Which ChatGPT plan do I need?
We tested it on ChatGPT Plus. In a Business or Enterprise workspace, an admin adds Kiln for the team.
What about Codex?
Codex is OpenAI’s coding agent, and Kiln works there too, installed on your computer. See the Codex page.
Will it print without asking me?
No. Kiln shows you the model, then waits for your yes before every print. You can say yes for a while so it stops asking on that printer, and end that whenever you like. Auto-print is off unless you turn it on.
Which printers does it work with?
Bambu Lab, Creality, Prusa, Elegoo, and most Klipper and OctoPrint machines. The full list is on the supported printers page.
Is Kiln made by OpenAI?
No. Kiln is independent, open-source software you can use from ChatGPT. It is not affiliated with or endorsed by OpenAI.
Add Kiln to ChatGPT →Using Claude? →Using Codex? →Using Cursor? →Using Gemini? →Using Grok? →Using OpenClaw? →
Kiln is independent, open-source software. It is not affiliated with or endorsed by OpenAI.