The creator pits five top AI models (ChatGPT, Claude, Muse Spark, Grok, Kimi) against each other in a challenge to design, engineer, and 3D print the strongest bridge under specific constraints. The video documents the assembly and stress-testing process for each bridge, sequentially eliminating the failures (Kimi, Grok) and ranking the others (OpenAI, Meta) by the weight they can hold. The final and winning bridge, designed by Anthropic's Claude, is tested with over 100 pounds of weights and then with a person standing on it until it dramatically breaks.
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Welcome to Episode 02 of Agent Wars. Today we’re challenging 5 top AI models to design, engineer and 3D print a bridge with the goal of holding the most possible weight.
For Episode 02, here are the models I tested, with their reasoning level and the harness I used for each:
🇺🇸 Anthropic: Claude Opus 5.5 (High)
🇨🇳 Kimi: Kimi K3 (High)
🇺🇸 Meta: Muse Spark 1.3 (High)
🇺🇸 OpenAI: GPT 6 Astra (High)
🇺🇸 SpaceXAI: Grok 4.7 (High)
Each bridge had specific parameters. It had to span 2 feet, use a maximum 500 grams of filament, and it had to be under 18 hours of printing time. We specified what type of weight and where we would place it on the bridge.
🏆 THE SCORE:
Claude Opus 5.5 held an estimated 130 lbs! It took 9 hours and 11 minutes to print 17 parts and used 441 grams of filament.
Meta Muse Spark 1.3 held 26.5 lbs. It took 13 hours and 12 minutes to print 49 parts and used 478 grams of filament.
OpenAI GPT-6 Astra held an estimated 17.5 lbs. It took 15 hours and 44 minutes to print 29 parts and used 442 grams of filament.
SpaceXAI Grok 4.7 did not finish. On assembly it could not stand up by itself. It took 12 hours and 22 minutes to print 29 parts and used 460 grams of filament.
Kimi K3 did not finish. It wasn’t engineered correctly so the bridge could not even be assembled. It took 11 hours and 19 minutes to print 35 parts and used 446 grams of filament.
🏅 That means our champion for this episode is Claude Opus 5.5. Not only did it hold the most weight (by FAR) it also took the least time to print, used the least amount of parts and used the least amount of filament.
Transcript
We asked the five top AI models to design, engineer, and three d print a bridge to see which one could hold the most weight. We put ChatGPT, Claude, Muse Spark, Grok, and China's Kimmy to the test. Each model got the same prompt with specific parameters. The bridge had to span two feet, use a maximum 500 grams of filament, and had to land under eighteen hours of total printing time. So let's see who won. Kimmy was disqualified. It wasn't engineered correctly and good not even be assembled. Grok was a DNF. We're able to assemble it, but it couldn't stand up on its own. Astra fared a lot better. Five pounds, 10 pounds, 15 pounds, but it broke at 20. For what it's worth, I think it was the nicest looking bridge. Up next, Metamuse Spark 1.3, which got to five, ten, 15, and held 20 to beat Astra. Now it got a little wobbly at 25, so we put a Mac Mini on it for a good measure. 26.5 pounds. But it collapsed at 30. So, Claude, what do you got? Well, it ripped past Astra and Muse Spark. It got all the way up to a 100. I mean, we actually ran out of weight. We worse curious. How much more could we add? I think we could stand on it. I mean, I'm one fifty. A hundred rank fifty pounds. Ethan, get up there. And, damn, it actually held Ethan for a split second. So Opus 5.5 is by far and away our champion for episode two. I can't get one fifty.
