Claude Opus 4.5
No content available for this output.
Claude Opus 4.5 vs Claude Sonnet 4
Compare Claude Opus 4.5 and Claude Sonnet 4, both from Anthropic, tested across 33 shared challenges. Updated February 2026.
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Claude Opus 4.5vsClaude Sonnet 4
33 challenges
Why Claude Opus 4.5?
Leads 1 of 1 benchmarks
Stronger on SWE-bench Verified80.9% vs 72.7%
6 months newerNov 2025
Why Claude Sonnet 4?
No standout advantages
Favorites
Claude Opus 4.5Claude Sonnet 4
12 / 33
Logic Puzzlereasoning
Tests an AI's ability to solve a simple but potentially confusing logic puzzle
Claude Sonnet 4
I need to think through this step-by-step.
Given information:
- Sally is a girl
- Sally has 3 brothers
- Each brother has 2 sisters
Let me work out how many sisters are in the family total.
If each of Sally's 3 brothers has 2 sisters, and all the brothers are in the same family, then there must be 2 sisters total in the family.
Since Sally is one of those sisters, and there are 2 sisters total, Sally must have 1 sister.
Therefore, Sally has 1 sister.
Vote
2 / 33
Math Misconception Testreasoning
Tests an AI's understanding of number representation
Claude Opus 4.5
No content available for this output.
Claude Sonnet 4
No, 9.11 is not greater than 9.9.
To compare these decimal numbers:
- 9.11 = 9.11
- 9.9 = 9.90
Since both numbers have the same whole number part (9), we compare the decimal parts:
- 0.11 vs 0.90
- 11 hundredths vs 90 hundredths
Therefore, 9.9 is greater than 9.11.
Vote
3 / 33
Stochastic Consistency Testanalysis
Tests an AI's randomness and creativity
Claude Opus 4.5
No content available for this output.
Claude Sonnet 4
Here are 5 jokes for you:
-
Why don't scientists trust atoms? Because they make up everything!
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I told my wife she was drawing her eyebrows too high. She looked surprised.
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Why don't eggs tell jokes? They'd crack each other up!
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I'm reading a book about anti-gravity. It's impossible to put down!
-
Why did the scarecrow win an award? He was outstanding in his field!
All 5 jokes are unique - each one has a different setup, punchline, and comedic concept. They cover different types of wordplay: scientific puns (#1, #4), visual humor (#2), food puns (#3), and agricultural wordplay (#5).
Vote
4 / 33
SVG Layout Challengeimage generation
Tests an AI's ability to generate vector graphics
Claude Opus 4.5
No content available for this output.
Claude Sonnet 4
Vote
5 / 33
Xbox Controller SVG Artimage generation
Tests an AI's ability to create detailed SVG illustrations of gaming hardware
Claude Opus 4.5
No content available for this output.
Claude Sonnet 4
Vote
6 / 33
Generate a Stand-Up Routineconversation
Tests an AI's humor and creative writing ability
Claude Opus 4.5
No content available for this output.
Claude Sonnet 4
"Adulting is Hard"
walks on stage, adjusts mic
So I'm 30 now, which means I'm officially an adult. Apparently. Though I still feel like I'm just a confused teenager wearing a slightly more expensive t-shirt.
You know what nobody tells you about being an adult? How much time you spend pretending to understand what other adults are talking about. I was at a dinner party last week – because that's what we do now, we have "dinner parties" instead of just "eating pizza on the couch" – and someone started talking about mortgage rates.
I just nodded along like, "Oh yes, rates. Very mortgage-y." Meanwhile, I'm thinking a mortgage is something you get at a fancy French restaurant.
mimics sophisticated nodding
"Mmm, yes, I'll have the mortgage, medium rare."
And don't get me started on small talk with neighbors. I live in an apartment building, and there's this unspoken rule that you have to acknowledge each other in the hallway. But what do you say?
"Hey, nice... existing near me."
"Thanks, you too. Love what you've done with your... door."
The worst is when you're both waiting for the elevator in complete silence. It's like a hostage situation, but with more awkward eye contact. You're both just standing there, praying the elevator comes before one of you has to comment on the weather.
stares ahead uncomfortably
"So... it's very... outside today."
I tried being one of those people who meal preps. You know these people? They spend their entire Sunday cooking seventeen identical containers of sad-looking chicken and broccoli. I bought all the containers, felt very organized, very adult-like.
Week one: Perfect little meals, properly labeled. I felt like a productivity guru.
Week two: I'm eating cereal for dinner and using the containers to store my collection of takeout sauce packets.
holds up imaginary container
"Ah yes, vintage soy sauce, 2023. A good week for Chinese delivery."
Speaking of food, grocery shopping as an adult is weird. When you're a kid, the grocery store is magical. Everything looks amazing. You want the cookies, the candy, the sugar cereal with the cartoon mascot.
Now I walk through the store like a tired parent, even though I don't have kids. I'm just disappointed in all my options.
walks slowly, shaking head
"This yogurt has too much sugar. These crackers have no fiber. Why is everything either terrible for you or tastes like cardboard had a baby with sadness?"
And I've started doing this thing where I read nutrition labels like I understand them. I don't. I just nod thoughtfully and put things back like I'm some kind of wellness expert.
"Hmm, seventeen grams of... things. That seems like too many things."
The real kicker is when you find yourself getting excited about household appliances. Last month, I spent twenty minutes explaining to my friend why I love my new vacuum cleaner. TWENTY MINUTES. About a vacuum.
"It has three different settings! And look at this attachment! This little brush thing goes in corners!"
My friend just stared at me like I'd been replaced by a suburban mom from 1987.
But you know what? I've decided to embrace it. Yes, I get excited about good storage solutions. Yes, I have opinions about thread count. Yes, I've used the phrase "back in my day" unironically, and I'm only thirty.
shrugs confidently
Because being an adult isn't about having it all figured out. It's about confidently pretending you know what you're doing while secretly googling "how to fold a fitted sheet" for the hundredth time.
And if that's not the American dream, I don't know what is.
pause
Also, if anyone actually knows how to fold a fitted sheet, please find me after the show. I'll pay you.
mic drop gesture
Thank you, you've been a wonderful audience! Don't forget to tip your servers and call your parents – they're worried about you!
Total time: approximately 3 minutes when delivered at normal comedy pace
Vote
7 / 33
Pokémon Battle UI Recreationweb design
Recreate an interactive, nostalgic Pokémon battle UI in a single HTML file.
Claude Opus 4.5
No content available for this output.
Claude Sonnet 4
No content available for this output.
Vote
8 / 33
Mario Level UI Recreationweb design
Recreate an interactive, classic Mario level in a single HTML file.
Claude Opus 4.5
Claude Sonnet 4
Vote
9 / 33
Linear App Cloneweb design
Tests an AI's ability to replicate an existing UI with Tailwind CSS
Claude Opus 4.5
No content available for this output.
Claude Sonnet 4
Vote
10 / 33
Interactive Catan Boardweb design
Tests an AI's ability to create interactive web elements
Claude Opus 4.5
No content available for this output.
Claude Sonnet 4
Vote
11 / 33
World Map SVGimage generation
Tests an AI's ability to create a detailed world map in SVG format
Claude Opus 4.5
No content available for this output.
Claude Sonnet 4
No content available for this output.
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Sponsored
12 / 33
Random Tailwind Webappweb design
Generate a single-page, self-contained HTML webapp using Tailwind CSS for a randomly chosen category/industry/niche.
Claude Opus 4.5
No content available for this output.
Claude Sonnet 4
No content available for this output.
Vote
12 of 33