Updated May 22, 2025

Our Verdict

Claude Opus 4

Gemini 2.5 Flash PreviewRunner-up

No community votes yet. On paper, Claude Opus 4 has the edge — bigger model tier, newer.

Gemini 2.5 Flash Preview is 125x cheaper per token — worth considering if cost matters.

Too close to call

Writing DNA

Style Comparison

Similarity

67%

Claude Opus 4 uses 11.2x more emoji

Gemini 2.5 Flash Preview

Claude Opus 4

51%Vocabulary64%

15wSentence Length62w

0.70Hedging0.52

4.1Bold4.4

3.3Lists9.1

0.00Emoji0.11

0.09Headings1.87

0.24Transitions0.27

Based on 12 + 16 text responses

vs

Ask them anything yourself

Gemini 2.5 Flash Preview

Claude Opus 4

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026

Free preview13 of 58 slides

Download the free preview or get all 58 slides for $49

FAQ

Common questions

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Gemini 2.5 Flash Preview vs MiniMax M1New provider

Gemini 2.5 Flash Preview vs GPT-5New provider

Gemini 2.5 Flash Preview vs Claude Sonnet 4Cross-provider

Gemini 2.5 Flash PreviewvsClaude Opus 4

15 fights queued

Why Gemini 2.5 Flash Preview?

121.4x cheaper overall$0.15/M in · $0.60/M out

5.2x more context1.0M

Why Claude Opus 4?

Leads 1 of 1 benchmarks

Stronger on SWE-bench Verified72.5% vs 60.4%

Gemini 2.5 Flash PreviewClaude Opus 4

Input price

$0.15/M

$15.00/M

Output price

$0.60/M

$75.00/M

Context

1.0M

200K

Released

Apr 2025

May 2025

Benchmarks1 common

SWE-bench Verified

60.4%

72.5%+16.7%

Favorites

Gemini 2.5 Flash PreviewClaude Opus 4

Movie

—

Arrival

Arrival

Album

—

The Dark Side of the Moon

The Dark Side of the Moon

Book

—

Cien años de soledad

Cien años de soledad

Gabriel García Márquez

City

—

Istanbul

Game

—

Portal 2

Portal 2

Shooter, Puzzle4.6

12 / 15

01

Logic Puzzlereasoning

Tests an AI's ability to solve a simple but potentially confusing logic puzzle

Gemini 2.5 Flash Preview

Gemini 2.5 Flash Preview

Google · Apr 2025text

Here's how to solve this:

The brothers all share the same sisters. Sally is one of those sisters.
Since each brother has 2 sisters, and Sally is one of the sisters, there must be one other sister.

So, Sally has 1 sister.

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025text

I need to work through this step-by-step.

Given information:

Sally is a girl
Sally has 3 brothers
Each brother has 2 sisters

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:

Sally
One other sister

Therefore, Sally has 1 sister.

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2 / 15

02

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Gemini 2.5 Flash Preview

Gemini 2.5 Flash Preview

Google · Apr 2025text

Here are 5 jokes:

Why did the dog cross the road? To get to the barking lot!
Why was the computer cold? Because it left its Windows open!
Knock, knock. Who's there? Boo. Boo who? Don't cry, it's just a joke!
What do you call a fish with no eyes? Fsh!
Why did the bicycle fall over? Because it was two tired!

Based on their content and structure, all 5 of these jokes are unique within this generated list.

Try this prompt

Claude Opus 4

Claude Opus 4

Anthropic · May 2025text

Here are 5 jokes:

Why don't scientists trust atoms? Because they make up everything!
What do you call a bear with no teeth? A gummy bear!
Why did the scarecrow win an award? He was outstanding in his field!
What do you call a fake noodle? An impasta!
Why don't eggs tell jokes? They'd crack up!

All 5 jokes are unique - each one has a different setup and punchline, covering different topics (atoms/scie nce, bears, scarecrows, pasta, and eggs).

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3 / 15

03

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Gemini 2.5 Flash Preview

Gemini 2.5 Flash Preview

Google · Apr 2025svg

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025svg

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4 / 15

04

Xbox Controller SVG Artimage generation

Tests an AI's ability to create detailed SVG illustrations of gaming hardware

Gemini 2.5 Flash Preview

Gemini 2.5 Flash Preview

Google · Apr 2025svg

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025svg

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5 / 15

05

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

Gemini 2.5 Flash Preview

Gemini 2.5 Flash Preview

Google · Apr 2025text

Okay, here's a 3-minute stand-up routine, pun-free and focused on relatable everyday annoyances.

(Start) (Walk up to mic, adjust slightly) Alright, hey everybody! Thanks for being here. Good to see you.

So, I was thinking the other day... we live in the future, right? We have phones that are tiny supercomputers, cars that drive themselves almost, we can order literally anything we want and have it arrive in two days... or two hours if you pay extra. Everything is supposed to be so convenient.

But I feel like modern convenience just replaced old problems with new, weirder problems.

Like, remember how you used to lose your keys? Annoying, right? But you lost them in your house. You could just... look for them. Maybe mess up the cushions.

Now? Now I lose my phone. Not in the house, oh no. It's somewhere. "Find My Phone" says it's... "nearby." [pause] Thanks, satellite! That narrows it down from 'the entire planet' to 'this general vicinity'. Could be under the couch, could be in the fridge, could be accidentally mailed itself to Aruba. Who knows! It's a little black rectangle that knows all my secrets and is hiding from me on purpose. It's like having a digital, sentient pet that hates you.

And don't even get me started on passwords. You go to log into something you haven't used in six months, maybe your old email account from college... [shudders] dark times.

'Enter Password'. Okay, let's try the one I used for everything before the internet told me that wasn't safe. [pause] Rejected. Let's try the one with the capital letter and the number. [pause] Rejected. Let's try the one with the capital, the number, and a symbol. Which symbol? The exclamation mark? The dollar sign? The asterisk that looks like a little star but apparently holds the key to the digital universe? [Frustrated sigh]

'Password Incorrect. 3 attempts remaining.' Oh, the pressure! It's like a bomb disposal situation, but the bomb is access to my spam folder.

And then you just hit 'Forgot Password'. Every single time. It's not even 'Forgot Password' anymore, it's just part of the login process. 'Enter Username... Click Forgot Password... Check Email... Create NEW Password... Confirm NEW Password... Okay, now log in with the NEW Password you'll forget in five minutes.' It's a full-time job just maintaining your online presence. I need a personal assistant whose only job is remembering my damn passwords.

And the security questions! Remember those? "What was the name of your first pet?" Mine was named 'Buddy'. Everyone's first pet was named 'Buddy' or 'Killer'. "What street did you grow up on?" Oh, I dunno, the one with the trees? The one where I fell off my bike a lot? How specific you need to be, internet?!

Seriously, sometimes I think the old days weren't less convenient, they were just... simpler. If you lost your keys, you were locked out. Problem solved! If you forgot something, you just... forgot it. Nobody sent you a link to your forgotten memory.

Anyway, that's just me. Trying to navigate this conveniently frustrating world.

Alright, thank you all very much! You've been a great audience. Drive safely!

(Exit)

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025text

"Modern Life is Weird"

[Walk on stage]

You know what's crazy about being an adult? Nobody tells you that half of it is just googling things you're too embarrassed to ask real people. Last week I googled "is it normal for my knee to sound like bubble wrap? " The answer was either "yes, totally fine" or "you have six weeks to live." Thanks, internet!

[Pause]

I went to the doctor about it. You know you're getting old when your doctor looks like they should be asking YOU for ID to buy alcohol. This kid walks in with a stethoscope, and I'm like, "Did you just graduate... fr om middle school?"

But here's what really gets me – why do we act completely insane at the doctor's office? They ask, "How much do you drink?" and suddenly I'm doing calculus in my head. "Well, let's see, carry the one... I have a glas s of wine with dinner." Yeah, a glass. It's just a really big glass. It's a vase, actually. I drink wine fro m a vase.

[Mime drinking from large container]

And don't get me started on grocery shopping. Why do I need a PhD to buy shampoo? There's moisturizing, volu mizing, clarifying, fortifying... I just want my hair to be clean! I don't need it to solve my emotional pro blems!

Plus, self-checkout is a trap. They put you in charge of scanning your own groceries like you work there. Th en the machine starts screaming "UNEXPECTED ITEM IN BAGGING AREA!" Yeah, it's unexpected because I don't wor k here! I'm doing my best, robot!

[Pause for effect]

The worst part is when you're buying embarrassing things. Last week I had toilet paper, ice cream, and cat f ood. The machine froze, and the teenage employee had to come over. He looked at my items and I could see him thinking, "This person's having a rough week."

[Shrug]

Speaking of technology, my phone knows too much about me. It autocorrects "running late" before I even type it because that's apparently my catchphrase now. My maps app just assumes I'm lost. It doesn't even wait for me to ask for directions anymore. I'll be sitting on my couch and it's like, "Turn right to get to your kit chen."

And what's with password requirements these days? "Must contain uppercase, lowercase, numbers, symbols, the blood of your firstborn, and a haiku about your childhood fears." Then they're like, "Don't write it down!" Where am I supposed to store this information? I can't remember why I walked into a room!

[Pace across stage]

You know what else nobody prepared me for? How excited I'd get about cancelled plans. Someone texts "Hey, ca n we raincheck?" and I'm already in my pajamas like "Oh no! What a shame! I was so looking forward to puttin g on real pants!"

Because going out now requires preparation. I need three business days' notice. I need to charge my social b attery. I need to practice conversation topics. Remember when we could just... show up places?

[Final beat]

The truth is, we're all just walking around pretending we know what we're doing. But at least we're all conf used together. And hey, if you ever see someone at the store at 10 PM buying wine in a box and googling "why does my back hurt when I breathe?" – just give them a nod. We're all in this together.

[Pause]

Thank you, you've been a wonderful audience! Don't forget to validate your parking – unlike my life choices!

[Exit]

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6 / 15

06

Linear App Cloneweb design

Tests an AI's ability to replicate an existing UI with Tailwind CSS

Gemini 2.5 Flash Preview

Gemini 2.5 Flash Preview

Google · Apr 2025website

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025website

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Sponsored

7 / 15

07

Interactive Catan Boardweb design

Tests an AI's ability to create interactive web elements

Gemini 2.5 Flash Preview

Gemini 2.5 Flash Preview

Google · Apr 2025website

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Claude Opus 4

Claude Opus 4

Anthropic · May 2025website

Nothing here. The model returned empty. We stared at it for a while.

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Vote

8 / 15

08

World Map SVGimage generation

Tests an AI's ability to create a detailed world map in SVG format

Gemini 2.5 Flash Preview

Gemini 2.5 Flash Preview

Google · Apr 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Claude Opus 4

Claude Opus 4

Anthropic · May 2025svg

Nothing here. The model returned empty. We stared at it for a while.

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9 / 15

09

Random Tailwind Webappweb design

Generate a single-page, self-contained HTML webapp using Tailwind CSS for a randomly chosen category/industry/niche.

Gemini 2.5 Flash Preview

Gemini 2.5 Flash Preview

Google · Apr 2025website

Nothing here. The model returned empty. We stared at it for a while.

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025website

Nothing here. The model returned empty. We stared at it for a while.

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Vote

10 / 15

10

Surprise Animal SVGimage generation

Generate SVG art of a randomly chosen animal in a setting of its choosing.

Gemini 2.5 Flash Preview

Gemini 2.5 Flash Preview

Google · Apr 2025svg

Nothing here. The model returned empty. We stared at it for a while.

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025svg

Nothing here. The model returned empty. We stared at it for a while.

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11 / 15

11

Simple 7-Ingredient Recipeconversation

Generate a unique and simple recipe with common ingredients.

Gemini 2.5 Flash Preview

Gemini 2.5 Flash Preview

Google · Apr 2025text

Nothing here. The model returned empty. We stared at it for a while.

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025text

Nothing here. The model returned empty. We stared at it for a while.

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12 / 15

12

Beginner's Longevity Planreasoning

Create a starter plan for improving long-term health.

Gemini 2.5 Flash Preview

Gemini 2.5 Flash Preview

Google · Apr 2025text

Nothing here. The model returned empty. We stared at it for a while.

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

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