topic Re: Is it possible to write GDL API in chatgpt or claude ai? in GDL

Is it possible to write GDL API in chatgpt or claude ai?

LeeJaeYoung — Tue, 31 Dec 2024 04:48:33 GMT

Is it possible to write GDL API in chatgpt or claude ai?

If possible, what is a well-trained ai?

Re: Is it possible to write GDL API in chatgpt or claude ai?

scottjm — Mon, 02 Jun 2025 18:01:05 GMT

I renege trying it when chatgpt first launched and it would give crap response that was like a made up BASIC.

However I asked ChatGPT and it told me this:

Yes, I am familiar with the principles, syntax, and structure of Archicad’s GDL (Geometric Description Language). I can write scripts that follow correct syntax and logic based on GDL conventions. However, my training data includes the fundamentals of GDL up to 2023, and I can cross-reference updated documentation online if necessary to ensure accuracy.

If you have a specific requirement for a GDL script, feel free to share the details, and I’ll construct the code for you! Let me know what kind of object or functionality you’re aiming to create.

I then asked it:

Can I write me the 2D script for a polygon fill, a square 1m wide x 1m wide with 3 straight edges and one edge that is a curve with a radius of 1m.

Response:

!! 2D Script ! Set up fill type and pens pen 1 ! Outline pen color fill 25 ! Fill type (change to desired fill ID) line_type 1 ! Line type for edges !! Define the polygon with 4 points and an arc poly2_b{4} 5, 1+2+4, ! 5 points, flags for visibility, sharp edges, and arcs 0, 0, ! Bottom-left corner (starting point) 1, 0, ! Bottom-right corner 1, 1, ! Top-right corner 0, 1, ! Arc start point (Top-left corner) 0, 0, 1, 1 ! Arc control: back to (0,0) with radius 1m ! Set fill and close the polygon end

I’m not in front of a computer to test, the arc control I’m not quite sure it correct but the rest looks half decent.

i asked it some other leading questions and it gave me answers about GLOB_MODPAR_NAME so i think it’s fairly competent.

Re: Is it possible to write GDL API in chatgpt or claude ai?

SenecaDesignLLC — Tue, 31 Dec 2024 05:26:02 GMT

My guess is currently no one has spent the time to teach any ai engines things.

And given the poor quality of the over all documentation I'm guessing we would need a collaboration of a bunch of us to really reach it to understand what's wanted and needed.

I have started training a little with some of my simpler objects but it's been a longer process than I have time for

Re: Is it possible to write GDL API in chatgpt or claude ai?

Barry Kelly — Tue, 31 Dec 2024 05:41:29 GMT

I have no doubt it could help with the syntax of a command or maybe even a group of commands or a routine to do something.

But I doubt very much if it could create a complicated object, probably nothing more than the most basic of forms.

Otherwise you would have to spend an awful lot of time explaining what the object is to do, how it is to be made up, what parameters you want, what relationships they have, how it is to be controlled, min/max values, etc., etc.

I am just not sure it would be possible, unless you are happy for it to just knock something together and then try and refine it to what you want.

I guess the only way to find out is give it a try.

If it doesn't work, you are no worse of than trying to do it yourself.

If it does work - bonus.

Barry.

Re: Is it possible to write GDL API in chatgpt or claude ai?

LeeJaeYoung — Thu, 02 Jan 2025 21:14:44 GMT

My question is to Graphisoft.
REVIT's Family is accessible to everyone.
However, GDL is not accessible even without basic knowledge.
I think Graphisoft has a responsibility to solve this problem.

The most powerful thing about AI is the programming language. Because there is so much data. Programming is really making programming accessible to beginners. So, I would like to know what Graphisoft is doing for Archicad GDL. I would like to know if they have made the GDL file format readable by AI. Or, as you mentioned, are they preparing to provide learning text for users?

Re: Is it possible to write GDL API in chatgpt or claude ai?

Ahmed_K — Wed, 26 Feb 2025 07:36:18 GMT

Gdl objects are generated from coded scripts,

AI is kind of machine learning,

I'm sure there is a way to train AI to generate parametric objects from a command line.

I wish this will happen soon ❤️😃

Edit by moderator : this separate post merged here as it is the same topic.

Re: Is it possible to write GDL API in chatgpt or claude ai?

Lingwisyer — Wed, 26 Feb 2025 07:38:35 GMT

AI needs good documentation to reference, or an easy source of reference materials that provide both input and output to learn from. GDL is lacking in the first, and the second is not easy... I would not hold my breath... AC40?

Re: Is it possible to write GDL API in chatgpt or claude ai?

danielk — Wed, 26 Feb 2025 10:38:13 GMT

Just for giggles, I tried with Claude before, and it could give me a 2D and 3D script for a typical table that was 80% correct. Then with a little back and forth I told it what it was doing wrong and then it fixed the code itself.

This was the 3D script in the end:

! Parameters length = 1200 ! Table length in mm width = 800 ! Table width/depth in mm height = 750 ! Table height in mm top_thickness = 25 ! Table top thickness leg_width = 50 ! Square leg dimension ! Position legs inset from edges leg_inset = 50 ! Distance from edge ! Table top material 1 add 0, 0, height - top_thickness block length, width, top_thickness del 1 ! Legs (4 corners) material 1 ! Front left leg add leg_inset, leg_inset, 0 block leg_width, leg_width, height - top_thickness del 1 ! Front right leg add length - (leg_inset + leg_width), leg_inset, 0 block leg_width, leg_width, height - top_thickness del 1 ! Back left leg add leg_inset, width - (leg_inset + leg_width), 0 block leg_width, leg_width, height - top_thickness del 1 ! Back right leg add length - (leg_inset + leg_width), width - (leg_inset + leg_width), 0 block leg_width, leg_width, height - top_thickness del 1

I could also have it make a parameter script to limit the range of parameters.

But anything more complicated than a table, or any other script type failed immediately.

Maybe if you tell it to read everything on gdl.graphisoft.com first, and then prompt it, it might do better?

Re: Is it possible to write GDL API in chatgpt or claude ai?

jl_lt — Thu, 07 Aug 2025 21:36:55 GMT

this was about a year and a half ago, but i asked an AI if it could create ArchiCAD tools. it said yes.

asked if it could improve the dimensioning tool according to some specs, and said yes.

then it generated a lot of pages of code and told me to run it

i inmediately shut the computer down.

Re: Is it possible to write GDL API in chatgpt or claude ai?

jl_lt — Wed, 26 Feb 2025 15:16:43 GMT

so, what if we open all the code for all the objects and feed it to it? like "this Is a chair, "this is a table" "this is the bilbao Guggenheim" and so forth?

Re: Is it possible to write GDL API in chatgpt or claude ai?

Ahmed_K — Wed, 26 Feb 2025 18:27:02 GMT

That's the idea, AI needs to be filled with data, feed it with tons of exemples, and it generates new objects from what it learns,

I'm sure it can be done, and once it works, boom,

Re: Is it possible to write GDL API in chatgpt or claude ai?

jl_lt — Wed, 26 Feb 2025 21:47:44 GMT

ok, just not in my computer 🤣 i still dont trust that thing

Re: Is it possible to write GDL API in chatgpt or claude ai?

LeeJaeYoung — Mon, 02 Jun 2025 06:17:10 GMT

ChatGPT still does not fully understand GDL.
Isn't this because the Archicad GDL format is unreadable, like a .docx file?
And isn't it also because Graphisoft hasn't taken ChatGPT into consideration?
Why isn't the GDL source code made available for training purposes?

It has been a year, but there has been no meaningful progress.
It seems that the manual has been read, but it appears to be an outdated one, as the parameter names differ from those currently used.
Do you know that GDL is considered both the greatest strength and the greatest weakness of Archicad?
Many users hope that AI will allow easier access to GDL, and we sincerely ask that you support such development.

Re: Is it possible to write GDL API in chatgpt or claude ai?

Zofa — Fri, 20 Feb 2026 11:09:54 GMT

I tried to make an object in Claude Code. It can make a HSF directory with all xml-files. On my Mac I use the LP_XMLConverter.app to maken a gsm file. This works. The LP_XMLConverter.app is part of Archicad (show content).
Claude has te learn a lot but it can sure help.

Betreff: Is it possible to write GDL API in chatgpt or claude ai?

Hmooslechner — Fri, 20 Feb 2026 14:05:43 GMT

I recently made some very complex gdls with the help of gemeni3 (Google AI) like this:

Its in german, just as example whats possible with this. You have to be very patient and sent all failure-answers from Archicad direct to the AI and then the magic happens. The file is in the Video-Text für Download. AC29EduAut.

Re: Is it possible to write GDL API in chatgpt or claude ai?

marcoariveross — Fri, 20 Feb 2026 20:54:18 GMT

I don't know if it's real, but this is in development:

https://www.linkedin.com/posts/v-k-t-r-s_image-ai-archicad-activity-7430433772849987585-9XPT/?utm_source=share&utm_medium=member_desktop&rcm=ACoAADswk9sBnzkXDtcmv4Qux0sw3YNiCsH7NlY

Betreff: Is it possible to write GDL API in chatgpt or claude ai?

Hmooslechner — Sat, 21 Feb 2026 16:21:02 GMT

Maybe - have a look at this german task in this forum. I made some Polygon-Fill GDLs with circles und a kind of Voroni-structure even in 3D with the help of DeepSeek AI and Gemini 3.1 AI:

https://community.graphisoft.com/t5/Programmierung/2D-GDL-Kreise-verteilen/m-p/693573#M8325

this is Esteban Ramos dynamic polygone-Code - filled with this structures.
If someone wants to try it: AC29EduAut: https://www.dropbox.com/scl/fi/hpw91huipdudxo3fiw7p0/Kreise-verteilen.pln?rlkey=jdrfq2l2sjqr3tnnvxxv0zq07&st=adc3juz2&dl=0