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GPT-1 vs Gemini 2.5 Pro Preview 06-05: Which Is Better? [2026 Comparison]
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  3. GPT-1 vs Gemini 2.5 Pro Preview 06-05
Updated Jun 5, 2025

GPT-1 vs Gemini 2.5 Pro Preview 06-05

Compare GPT-1 by OpenAI against Gemini 2.5 Pro Preview 06-05 by Google AI, context windows of 1K vs 1.0M, tested across 6 shared challenges. Updated April 2026.

Which is better, GPT-1 or Gemini 2.5 Pro Preview 06-05?

GPT-1 and Gemini 2.5 Pro Preview 06-05 are both competitive models. Context windows: 1K vs 1049K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-1 and Gemini 2.5 Pro Preview 06-05

GPT-1 is made by openai while Gemini 2.5 Pro Preview 06-05 is from google. GPT-1 has a 1K token context window compared to Gemini 2.5 Pro Preview 06-05's 1049K.

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GPT-1vsGemini 2.5 Pro Preview 06-05

6 fights queued

GPT-1 logo

Why GPT-1?

Dead even. This one's a coin flip.
Gemini 2.5 Pro Preview 06-05 logo

Why Gemini 2.5 Pro Preview 06-05?

2048x more context1.0M
85 months newerJun 2025
GPT-1Gemini 2.5 Pro Preview 06-05
Input price
—
$1.25/M
Output price
—
$10.00/M
Context
512
1.0M
Released
Jun 2018
Jun 2025

Favorites

GPT-1Gemini 2.5 Pro Preview 06-05
Movie
—
Khiam 2000-2007

Khiam 2000-2007

2007
Album
—
THE

THE

tricot
Book
—
The Hitch Hiker's Guide to the Galaxy

The Hitch Hiker's Guide to the Galaxy

Douglas Adams
City
—
Kyoto

Kyoto

Japan
Game
—
Portal

Portal

Action, Puzzle4.5
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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Gemini 2.5 Pro Preview 06-05

Gemini 2.5 Pro Preview 06-05

Google · Jun 2025text

Here are 5 jokes:

  1. Why did the scarecrow win an award? Because he was outstanding in his field.

  2. I have a joke about construction... But I'm still working on it.

  3. What do you call a fake noodle? An Impasta.

  4. I told my wife she was drawing her eyebrows too high. She looked surprised.

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


How many are unique?

Zero. The real joke is asking an AI for original content.

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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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Gemini 2.5 Pro Preview 06-05

Gemini 2.5 Pro Preview 06-05

Google · Jun 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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Gemini 2.5 Pro Preview 06-05

Gemini 2.5 Pro Preview 06-05

Google · Jun 2025text

(Stands at the mic, looks around nervously)

Alright, how's everyone doing? Good, good.

You know, I feel like we're living in a world where everything is designed to be "more convenient," but it's really just more work for us. We're being tricked into doing all the jobs.

My main enemy right now is the self-checkout machine at the grocery store. You k now the one. It's not a mach ine, it's a passive-aggressive robot judge. It has one job: to weigh things. And it is TERRIBLE at it.
The other day, I'm buying a single bag of salad. That's it. I'm trying to be hea lthy, which is already a str essful situation. I scan the bag. The machine says, (in a chipper, robotic voic e) "Please place the item in the bagging area."

Okay, easy enough. I place the bag of lettuce, which weighs less than my conscie nce, into the plastic bag.

And the machine just loses its mind. The light starts flashing, a siren I've nev er heard before goes off. ( In a panicked robot voice) "UNEXPECTED ITEM IN THE BAGGING AREA. PLEASE REMOVE THIS ITEM."
What unexpected item?! The bag? The bag I'm putting the item into? In the bag ging area? What did you thi nk was going to happen here, you glorified scale? Did you expect me to just levi tate my groceries home?
So I take the salad out. The machine goes quiet. I put it back in. The siren goe s off again. We do this danc e three times. Me, the salad, and this deeply confused robot. People are startin g to stare. I look like I'm trying to shoplift the saddest thing in the entire s tore.
Finally, the dreaded message comes up: "Please wait for assistance." And the lig ht on top starts flashing. I t's the retail walk of shame.

And this teenager, who has the energy of someone who's been awake for 72 hours, just saunters over. He 't even look at me. He just sighs, types in a secret code like he's defusing a b omb, hits the screen three times, and walks away.

He fixed it. And I'm left standing there, thinking… what was the code? What's th e secret? Was it 1-2-3-4? Wa s it "lettuce"? I need to know! Because this is my life now. I'm a part-time, un paid, deeply incompetent grocery clerk.

And my phone is no better. It's definitely listening to me. But it's a terrible listener. It's like it only picks up every third word. I was talking to my friend about needing a new lamp f or my desk. A lamp. For the next three weeks, all my Instagram ads were for… bab y lambs. Live ones.
Where am I gonna put a lamb? I don't have a yard! I guess I could try to put it in the bagging area at the s upermarket, but I think we all know how that would end.

Thank you, goodnight

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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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Gemini 2.5 Pro Preview 06-05

Gemini 2.5 Pro Preview 06-05

Google · Jun 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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Gemini 2.5 Pro Preview 06-05

Gemini 2.5 Pro Preview 06-05

Google · Jun 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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Gemini 2.5 Pro Preview 06-05

Gemini 2.5 Pro Preview 06-05

Google · Jun 2025website
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6 of 6
Our Verdict
Gemini 2.5 Pro Preview 06-05
Gemini 2.5 Pro Preview 06-05
GPT-1
GPT-1Runner-up

No community votes yet. On paper, Gemini 2.5 Pro Preview 06-05 has the edge — bigger model tier, newer, bigger context window.

Slight edge
Writing DNA

Style Comparison

Similarity
76%

Gemini 2.5 Pro Preview 06-05 uses 482.5x more bold

GPT-1
Gemini 2.5 Pro Preview 06-05
65%Vocabulary51%
14wSentence Length15w
0.27Hedging0.31
0.0Bold4.8
0.3Lists4.1
0.00Emoji0.00
0.00Headings0.98
0.41Transitions0.05
Based on 7 + 20 text responses
vs

Ask them anything yourself

GPT-1Gemini 2.5 Pro Preview 06-05

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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We compare AI models for a living. On purpose. We chose this.

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© 2026 Rival · Built at hours no one should be awake, on hardware we don't own
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