/Tech3h ago

Creator @l2k built a functioning physical hexapod robot using Claude and Codex to prompt CAD designs and train simulated gaits

The physical robot showed minor simulation-to-reality performance gaps.

23193108345.9K
Original post

I vibe-CADed a hexapod walker entirely with claude/codex, learned the walking gait entirely in the 3d simulator, 3d printed the generated files, ordered the full BOM from amazon, assembled the thing. The fact that this is possible is amazing, but there's still some clear differences between the simulated world and reality 😀.

3:07 PM · Jun 10, 2026 · 45.8K Views
Sentiment

Positive users praise the hexapod robot built with Claude and Codex for its realistic animal-like behavior and exciting future potential, while a few dismiss the project as trivial or unproven.

Pos
81.8%
Neg
18.2%
11 comments with sentiment.
Cluster Engagement
Posts from X
Most Activity
Most Activity
LIKES6

I went back and reinforced the broken parts and it’s really starting to work!

I vibe-CADed a hexapod walker entirely with claude/codex, learned the walking gait entirely in the 3d simulator, 3d printed the generated files, ordered the full BOM from amazon, assembled the thing. The fact that this is possible is amazing, but there's still some clear differences between the simulated world and reality 😀.

1hViews 150Likes 6Bookmarks 0
REPLIES1
Dan@realoutdoordad

@l2k The way it just gives up like a real animal dying is top notch.

23hViews 243Likes 1
Zero Void@0x00_void

@l2k sim to real is the final boss

22hViews 100Likes 2
Jonathan Whitaker@johnowhitaker

@l2k Only minor differences 😂 Amazing how much personification happens when it's physical - that thing is clearly struggling, poor spider!!

1dViews 435
TallDave@TallDave7

@l2k

23hViews 127Likes 1
James Cham@jamescham

@l2k OMG. How much bigger can it get?

I vibe-CADed a hexapod walker entirely with claude/codex, learned the walking gait entirely in the 3d simulator, 3d printed the generated files, ordered the full BOM from amazon, assembled the thing. The fact that this is possible is amazing, but there's still some clear differences between the simulated world and reality 😀.

2hViews 165Likes 0Bookmarks 0
andrew@armillspaugh

@l2k this is awesome! what do you think you could've done differently to reduce the likelihood of failure? better simulation?

15hViews 164
Ivan Vnučec@ivanvnucec

@l2k Pics or it didn't happen

13hViews 47
TallDave@TallDave7

@realoutdoordad @l2k you can almost hear it whisper

"please kill me"

23hViews 14Likes 1
Pete Skomoroch@peteskomoroch

@l2k So close! Keep iterating 😀

3hViews 42
gof@zxy88366382

@l2k 这不是大学生课后小作业吗

11hViews 39
Ratish@Imperor42

@l2k We're gonna get so many pet robots from this

3hViews 19
sahilmaniyar@Sahiljmaniyar

@l2k There's a sign of life

3hViews 17
Guilherme O'Tina@guilhermeotina

@l2k the sim-to-real transfer is the part i'm most curious about. what physics engine did you use and how much domain randomization did it need to walk on the real hardware?

22hViews 9