Compare Claude Opus 4 by Anthropic against o1 by OpenAI, in 1 community votes, claude opus 4 and o1 are closely matched, context windows of 200K vs 128K, tested across 22 shared challenges. Updated February 2026.
In 1 community votes, Claude Opus 4 and o1 are closely matched. Based on blind community voting from the RIVAL open dataset of 1+ human preference judgments for this pair.
22 challenges
Tests an AI's ability to solve a simple but potentially confusing logic puzzle
I need to work through this step-by-step.
Given information:
Since Sally is one of the sisters that each brother has, and each brother has 2 sisters total, that means th ere must be exactly 2 sisters in the family.
The 2 sisters are:
Therefore, Sally has 1 sister.
First, note that each of Sally’s three brothers has exactly two sisters. One of those sisters is clearly Sally. Since each brother’s two sisters must be the same two girls for all of them, there must be exactly one other sister besides Sally.
Therefore, Sally has 1 sister.
Tests an AI's randomness and creativity
Here are five jokes:
Why did the scarecrow get promoted?
Because he was outstanding in his field.
I told my friend she drew her eyebrows too high.
She looked surprised.
What do you call cheese that isn’t yours?
Nacho cheese.
Why don’t skeletons fight each other?
Because they don’t have the guts.
Did you hear about the restaurant on the moon?
Great food, but absolutely no atmosphere.
How many are unique?
All five jokes listed here are distinct and thus count as five unique jokes.
Tests an AI's ability to generate vector graphics
Tests an AI's ability to create detailed SVG illustrations of gaming hardware
Tests an AI's humor and creative writing ability
[Comic steps on stage, takes the mic]
“Hey everyone, thanks for coming out tonight. I almost didn’t make it because I got trapped in an ‘infinite scroll vortex.’ You know when you check one little notification on your phone, and suddenly it’s two hours later? My left thumb is basically a professional athlete at this point—I'm in the Guinness Book of World Records for ‘fastest social media refresh.’ I feel like every time I tap my screen, I’m signing away another portion of my soul. But hey, at least I’m caught up on all my ex’s vacation photos and some random cat videos I can’t unsee.
So I got myself out of the house and decided to try being more ‘active.’ I went to one of those fancy gyms—where the equipment is shinier than my future. The treadmill is so high-tech it practically demands a DNA sample before you can start running. I’m standing there huffing and puffing while the machine's screen is playing scenic videos of mountains in Switzerland, encouraging me to ‘keep going.’ Meanwhile, I’m like, ‘Dude, I’m just trying not to collapse. Maybe ease up on the pep talk.’
After that, I thought I’d reward myself with a healthy smoothie. Have you seen the sizes of these things? You order a medium and you get a bucket of kale sludge. They hand it to you with a straw so wide you could drive a toy car through it. And suddenly you’re paying nine bucks to sip spinach—like that’s the best life decision you’ve made all day. Who needs retirement savings when you can have a fancy green drink that tastes suspiciously like lawn clippings?
On the way home, I got stuck in traffic. I just love that feeling when you’re gridlocked behind two people who are evidently in no rush to do anything, ever. I’m sitting there, going about two miles an hour, which is basically just a very aggressive crawl. I’m not proud of how often I shout at my windshield. My car is like my personal confessional booth, and the traffic jam is me atoning for all the times I told Netflix, ‘Yes, I’m still watching.’
Anyway, that’s me, folks. If you’ll excuse me, I have 47 unread notifications that I need to pretend don’t exist until tomorrow. Thanks so much for laughing along—and remember, if you want to feel accomplished tonight, just check something off your to-do list… or, you know, at least make one.” [Comic waves and exits the stage]
Recreate an interactive, classic Mario level in a single HTML file.
Tests an AI's ability to replicate an existing UI with Tailwind CSS
Tests an AI's ability to create interactive web elements
Tests an AI's ability to create a detailed world map in SVG format
Generate SVG art of a randomly chosen animal in a setting of its choosing.
Generate a unique and simple recipe with common ingredients.
Create a starter plan for improving long-term health.
