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GPT-1 vs Claude Opus 4: Which Is Better? [2026 Comparison]
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  3. GPT-1 vs Claude Opus 4
Updated May 22, 2025

GPT-1 vs Claude Opus 4

Compare GPT-1 by OpenAI against Claude Opus 4 by Anthropic, context windows of 1K vs 200K, tested across 6 shared challenges. Updated April 2026.

Which is better, GPT-1 or Claude Opus 4?

GPT-1 and Claude Opus 4 are both competitive models. Context windows: 1K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-1 and Claude Opus 4

GPT-1 is made by openai while Claude Opus 4 is from anthropic. GPT-1 has a 1K token context window compared to Claude Opus 4's 200K.

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GPT-1vsClaude Opus 4

6 fights queued

GPT-1 logo

Why GPT-1?

Dead even. This one's a coin flip.
Claude Opus 4 logo

Why Claude Opus 4?

390.6x more context200K
85 months newerMay 2025
GPT-1Claude Opus 4
Input price
—
$15.00/M
Output price
—
$75.00/M
Context
512
200K
Released
Jun 2018
May 2025

Favorites

GPT-1Claude Opus 4
Movie
—
Arrival

Arrival

20167.6
Album
—
The Dark Side of the Moon

The Dark Side of the Moon

Pink Floyd
Book
—
Cien años de soledad

Cien años de soledad

Gabriel García Márquez
City
—
Istanbul

Istanbul

Turkey
Game
—
Portal 2

Portal 2

Shooter, Puzzle4.6
6 / 6
01

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

GPT-1

GPT-1

Openai · Jun 2018text

Generate 5 jokes. How many are unique? the one that was asked was in the'the one who didn't have a head and wanted to keep it?'i don't recall whic h one, not that i've ever written anything more. the one who didn't have a head and wanted to keep i t? what did that mean by'the one who '? the one who thought he did have a head? what was it this time? the time i said his name. what was it last time? the one who didn't have a head and wanted to keep the joke? the one who did

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025text

Here are 5 jokes:

  1. Why don't scientists trust atoms? Because they make up everything!

  2. What do you call a bear with no teeth? A gummy bear!

  3. Why did the scarecrow win an award? He was outstanding in his field!

  4. What do you call a fake noodle? An impasta!

  5. 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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2 / 6
02

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

GPT-1

GPT-1

Openai · Jun 2018text

Generate an SVG of a pelican riding a bicycle. the one - shot - hole in the ground that i can't see is the last building on the street. i feel bad driving this bike because then we 'd have to turn the car around and pull into the next alley. i turn the bike around, putting it through its paces. then, i drive the bike toward the next building. it's a nice little corner office, but the place is a mess. after a time i put it back in the center parking lot behind the rest of the neighborhood. now that i think about it, i can still see the lights from

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025svg
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3 / 6
03

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

GPT-1

GPT-1

Openai · Jun 2018text

Write a 3-minute stand-up comedy routine that isn't based on puns. the one thing was for sure, no matter how many times he gave this speech, he 'd never be able to remember all of it. he was never sure if he liked the guy or not. the next day, he went out with a band friend and got them started. some of the other guys were pretty hot, but mike was way tougher than everybody else. he sat on the stage and sang along with the set. the sound effects made it really hard to focus. the lead singer, who was named " red

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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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4 / 6
04

World Map SVGimage generation

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

GPT-1

GPT-1

Openai · Jun 2018text

Create a simplified world map as an SVG showing major continents with different colors. Add labels for at least 5 major countries. the map of russia showed the continents as two separate continents on one level, and europe and china as a third. when i was done with the list, i stopped. i remembered that the page i 'd left was a map of the world with a map of europe with an ocean view on the opposite side. i looked at the page from italy and it looked like it was taken by the map of italy, so i stood up and put it back. then i grabbed my cell phone and called my secretary

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025svg
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5 / 6
05

Surprise Animal SVGimage generation

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

GPT-1

GPT-1

Openai · Jun 2018text

Create an SVG art of an animal of your choosing in a setting of your choosing. Surprise me.

  • the diary of dominique maksylov, " isabelle whispered. " isn't that a rather boring tale? " " yes, " he grumbled, not wanting to admit the truth. " well, the point is i'm the daughter of a duke and therefore don't belong in any story and therefore don't belong anywhere. " " it seems i have no idea what the point of this will be then. " dominique felt his face grow hot. isabelle nodded. " of course you do, my lord,
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Claude Opus 4

Claude Opus 4

Anthropic · May 2025svg
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6 / 6
06

Music App Landing Pageweb design

Design a modern, minimal landing page for a music streaming app with hero, features, and CTA sections.

GPT-1

GPT-1

Openai · Jun 2018text

Design a modern, minimal landing page for a music streaming app called "Wavefront" that focuses on indie artists. The landing page should have a hero section, features section, and call-to-action. Use a color scheme of deep purples and teals. In a single-page self-contained HTML. the original " author " website is created with " i love music " and provided by my grandfather. the story of my youth is inspired from a very early age. for the first few weeks after i left the boarding school i went out with a band, called the cello and accordion, by the

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025website
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6 of 6
Our Verdict
Claude Opus 4
Claude Opus 4
GPT-1
GPT-1Runner-up

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

Slight edge
Writing DNA

Style Comparison

Similarity
45%

Claude Opus 4 uses 444.0x more bold

GPT-1
Claude Opus 4
65%Vocabulary64%
14wSentence Length62w
0.27Hedging0.52
0.0Bold4.4
0.3Lists9.1
0.00Emoji0.11
0.00Headings1.87
0.41Transitions0.27
Based on 7 + 16 text responses
vs

Ask them anything yourself

GPT-1Claude Opus 4

Some models write identically. You are paying for the brand.

178 models fingerprinted across 32 writing dimensions. Free research.

Model Similarity Index

185x

price gap between models that write identically

178

models

12

clone pairs

32

dimensions

Devstral M / S
95.7%
Qwen3 Coder / Flash
95.6%
GPT-5.4 / Mini
93.3%
Read the full reportor download the 14-slide PDF

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 previewor get all 58 slides for $49
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© 2026 Rival · Built at hours no one should be awake, on hardware we don't own
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