algorithmic modeling for Rhino



Octopus is a plug-in for applying evolutionary principles to parametric design and problem solving. It allows the search for many goals at once, producing a range of optimized trade-off solutions between the extremes of each goal.

Also see octopus.E for custom evolutionary algorithms.


Download the latest version on food4rhino

It is part of a range of tools developed at the University of Applied Arts Vienna, and Bollinger+Grohmann Engineers.


  • search for single goal + diversity of solutions
  • search for best trade offs between 2 to X goals
  • improve solutions by similarity-goals
  • choose preferred solutions during a search
  • change objectives during a search
  • solutions' 3d models for visual feedback
  • recorded history
  • save all search data within the Grasshopper document
  • save a solution as a Grasshopper State
  • export to text or text files

Octopus introduces multiple fitness values to the optimization. The best trade-offs between those objectives are searched, producing a set of possible optimum solutions that ideally reach from one extreme trade-off to the other.

Based on SPEA-2 and HypE from ETH Zürich and David Rutten's Galapagos User Interface. Developed by Robert Vierlinger in cooperation with Christoph Zimmel, and Bollinger+Grohmann Engineers.


To install:

  • Copy the .gha and .dll file into the Grasshopper components folder 
  • Right-click the file > Properties > make sure there is no "blocked" text
  • Restart Rhino and Grasshopper


Some examples are provided here

New commented examples and a brief manual are provided in the download of octopus on food4rhino.

Location: Vienna
Members: 454
Latest Activity: Jul 23

Discussion Forum

problem while working in curves

hi,i need help when I am working in curves few commands stop working. like nurb curves, move and many other commands. Please tell me, what will I do?Continue

Started by Khadija Farooq May 21.

Using a complicated loop with Galapagos/Octopus

Hi!I have a pretty complex code that’s making an urban planning system to construct blocks and tiles.I made a loop with anemone as I can’t seem to make the Octopus loop work at all (it only does the…Continue

Started by Lev Zhi Nov 27, 2021.

Octopus window issue! 4 Replies

Hey all,I've been trying for hours to open the octopus window by clicking on it!(screenshot attached), the window isnt even minimized somewhere on the screen, i searched a lot.I removed it and copied…Continue

Started by fares. Last reply by Kleber Oliveira Nov 16, 2021.

Octopus Cube View

Hi I’m trying to see my multi optimization results in Octopus but when I run the octopus tool, I only see the results in CUBE VIEWS,…Continue

Started by Luciana Tenorio Sep 21, 2021.

Comment Wall

Add a Comment

You need to be a member of Octopus to add comments!

Comment by fred labbe on December 8, 2014 at 7:18

Does the latest version of Octopus work with Grasshopper 0.9.0076.... download page says it is compatible with 0.9.0075.

If only works with 0.9.0075 any tips on where to find thta version of Grasshopper? 


Comment by Dan Hou on September 25, 2014 at 1:55

What is the algorithm to calculate hypervolume metric? Is it HSO?

Comment by Andreas Wilde on July 30, 2014 at 3:12

Can Octopus pick the best solution itself? Where?

How does Octopus deal with multicriteria weighting and multicriteria scores?

Comment by Brian Ringley on July 7, 2014 at 7:20

Haha no prob. You should keep the Awesome tab for the next release. Thanks for all your work in this area.

Comment by Robert Vier on July 4, 2014 at 4:08

Oh this is a mistake in compiling the plug-in, this component was purely for development, and not supposed to be in the official release.

Sorry for the confusion,



Comment by Brian Ringley on July 3, 2014 at 17:27

Ha I'm getting an "Awesome" tab when I load the Octopus.e gha. What is this thing?!

Comment by wil on December 21, 2013 at 5:01

Is there any version of Octopus that works with Grasshopper 0.9.0064? I can load the component, but it crashes whenever I delete it from the canvas.

Comment by Jesus Galvez on November 19, 2013 at 12:29

OK, it seems to be working. Only thing is on each start I only get one generation, instead of many. I guess I have to mess around with the options. 

Also the text is very difficult to read. I didn't realize until now that there were numbers on the fields. 

Comment by Jesus Galvez on November 19, 2013 at 12:20

Hello Abraham, 

the files are unblocked. I can use the Octopus component and upon opening the example files I can see the results of the default calculation. But when I click Start again the log file 01_singleObjective_Diversification_OctopusErrorLog_20131119.txt  says:

Error, reduction of environmental selection did not yield the correct archive size

I have previously used Octopus 0.1 flawlessly.

Comment by Abraham Yezioro on November 19, 2013 at 11:43

You need to unblock the .dll file.



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