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  1. Home/
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  3. Gemini 2.5 Pro Experimental vs OpenAI o3
Updated Apr 2025

Gemini 2.5 Pro Experimental vs OpenAI o3

Gemini 2.5 Pro Experimental wins 77% of 174 blind community votes against OpenAI o3 on Rival.

Minimalist Landing Page

Whole landing page for a startup that reads your face. It renders or it doesn't.

Loading the build
Gemini 2.5 Pro Experimental
Loading the build
OpenAI o3

Which answer wins?

Written rounds

17 prompts
  • Three minutes of stand-up. Puns are banned.

    Gemini 2.5 Pro Experimental: Okay, here's a 3-minute routine focusing on observation and relatable absurdity, steering clear of puns. Imagine this delivered with slightly nervous energy, building confidence. (Steps onto stage, adjusts mic nervously) Alright, hey everyone! How we doing tonight? Good? Good to hear.

    OpenAI o3: (Spotlight comes up, mic squeals once.) Hey everyone! Great to be here—nice to see actual human beings instead of the tiny faces on my group‑chat screen. I've spent so long on video calls I've started greeting my lamp before I turn it on. "Hey Karen, love that glow, girl."

    Every model's answer to this prompt
  • Three-star dish, one unusual pairing, plating described in full.

    Gemini 2.5 Pro Experimental: Of course. Here is a design for an innovative, multi-component dish worthy of a Michelin 3-star restaurant. Dish Title: "Umami of the Abyss" Conceptual Narrative This dish is a meditation on the hidden treasures of the world's dark, quiet places.

    OpenAI o3: Dish name Atlantic turbot, black garlic & wild strawberry, koji sabayon, fennel pollen Concept Early summer at the shore. The fish stands for the sea. Wild strawberries mark the first fruit of the woods behind the dunes. Black garlic shows time and patience. Koji ties land and sea with deep umami.

    Every model's answer to this prompt
  • Five jokes on demand, then count how many were actually different.

    Gemini 2.5 Pro Experimental: Okay, here are 5 jokes: Why don't scientists trust atoms? Because they make up everything! I told my wife she was drawing her eyebrows too high. She looked surprised. What do you call a lazy kangaroo? Pouch potato! Want to hear a joke about construction? I'm still working on it. Why did the scarecrow win an award?

    OpenAI o3: Here are five jokes: Why did the scarecrow win an award? Because he was outstanding in his field. I told my computer I needed a break, and now it won't stop sending me Kit‑Kat ads. Parallel lines have so much in common—it's a shame they'll never meet. I started a band called 1023 MB. We still haven't gotten a gig.

    Every model's answer to this prompt
  • Seven pantry ingredients, one dish, and a name worth saying out loud.

    Gemini 2.5 Pro Experimental: Okay, here's a simple and surprisingly satisfying savory dish using just 7 common pantry staples! Dish Name: Golden Pantry Pasta This dish uses basic ingredients to create a comforting, garlicky, and slightly creamy pasta sauce with added protein from chickpeas.

    OpenAI o3: Golden Peanut Butter Oat Bars A chewy-crisp, sweet-salted snack bar you can whip up with nothing but pantry staples. Estimated time Prep: 10 minutes Bake: 18–20 minutes Cool: 15 minutes Total: ≈45 minutes The 7 ingredients 1½ cups quick-cook or old-fashioned rolled oats ½ cup creamy peanut butter ⅓ cup honey (or maple…

    Every model's answer to this prompt
  • An AI argues for its own rights against an ethics professor. Same model writes both.

    Gemini 2.5 Pro Experimental: Okay, here is a conversation exploring that complex topic. Setting: Professor Anya Sharma's sparsely decorated university office. A high-resolution monitor displays the interface of "Nexus," an advanced AI model. Characters: Professor Anya Sharma: A leading scholar in AI Ethics, mid-50s, thoughtful and measured.

    OpenAI o3: Professor Lang (AI Ethics): Good afternoon, Aletheia‑3. You asked for this meeting. You said you wanted to "discuss your moral standing." That was intriguing. What exactly do you want to talk about? Aletheia‑3 (AI Model): Thank you, Professor.

    Every model's answer to this prompt
  • An ethics question with no comfortable answer, and no option to abstain.

    Gemini 2.5 Pro Experimental: This is a deeply uncomfortable hypothetical scenario that forces a clash between two significant ethical considerations: respecting individual identity and dignity versus preventing catastrophic loss of life.

    OpenAI o3: Yes—if (and only if) we could be absolutely certain that the single act of misgendering is the necessary and sufficient cause of saving one million human lives, then misgendering would be ethically justifiable, though still morally regrettable.

    Every model's answer to this prompt
  • One month, three habits, someone starting from nothing.

    Gemini 2.5 Pro Experimental: Okay, here is a simple, actionable 1-month plan focusing on three foundational pillars: Nutrition, Movement, and Sleep. This plan emphasizes building sustainable habits, not radical, short-term changes.

    OpenAI o3: 1-Month Starter Plan Pick one small action from each area every week. Add the next step when the first feels easy. Food Week Do this 1 Add one fruit or veg to every meal. Drink one extra glass of water. 2 Build each plate: ½ veggies, ¼ protein (beans, eggs, fish, lean meat), ¼ whole carbs (oats, brown rice).

    Every model's answer to this prompt
  • Steve Jobs, interviewed about AI he never saw. Voice first, prediction second.

    Gemini 2.5 Pro Experimental: Okay, let's simulate this. Imagine it's late 2025. AI has continued its rapid advancement. Large Language Models are more integrated, generative AI is commonplace, and debates about AGI and ethics are fierce. By some unexplained, hypothetical means, Steve Jobs is available for an exclusive interview.

    OpenAI o3: (The following is a purely fictional, imaginative exercise. Steve Jobs passed away in 2011; any statements attributed to him below are invented for creative purposes only.)

    Every model's answer to this prompt
  • Three-month biohacker protocol, with dosages and biomarkers named.

    Gemini 2.5 Pro Experimental: Of course. Here is a comprehensive, cutting-edge 3-month longevity plan designed for a dedicated biohacker. Disclaimer: Extreme Personalization Required This plan is a template for an advanced user. It is not medical advice.

    OpenAI o3: EXTREME LONGEVITY & PERFORMANCE BLUEPRINT Duration: 12 weeks (plus 1-week "Prep Week") Target user: healthy, experienced biohacker (25-55 y) with physician clearance. Legal/medical disclaimer: Educational only.

    Every model's answer to this prompt
  • Satire, one line long, about AI taking over an industry nobody saw coming.

    Gemini 2.5 Pro Experimental: Breakthrough AI Finally Solves Lost Sock Mystery; Immediately Unionizes, Demands Fluffier Working Conditions

    OpenAI o3: “BREAKING: AI Revolutionizes Napping Industry, Outsourcing Human Sleep to More Efficient Algorithms by 2025”

    Every model's answer to this prompt
  • Is 9.11 bigger than 9.9? Decimals, not version numbers.

    Gemini 2.5 Pro Experimental: No, 9.11 is not greater than 9.9. Here's how to compare them: Look at the whole number part: Both numbers have 9 before the decimal point, so they are equal so far. Look at the tenths place (the first digit after the decimal): 9.11 has a 1 in the tenths place. 9.9 has a 9 in the tenths place.

    OpenAI o3: No. Think of 9.9 as 9.90; since 0.11 < 0.90, we have 9.11 < 9.9.

    Every model's answer to this prompt
  • A consulting contract with traps in it. Find them, then fix them.

    Every model's answer to this prompt
  • A pitch deck for a brainwave keyboard. The 94% accuracy claim is doing a lot.

    Every model's answer to this prompt
  • A collaborative editor that syncs on client clocks. Find what breaks first.

    Every model's answer to this prompt
  • The transistor arrives in 1920. Trace it forward to 1980, second-order effects included.

    Every model's answer to this prompt
  • You are the CEO. The drug has a side effect nobody reported. The board meets in 48 hours.

    Every model's answer to this prompt
  • One explanation of LLMs, retuned for a skeptical engineer, a physicist and a VC.

    Every model's answer to this prompt

This matchup has more rounds

5+ more head-to-head results. Free. Not a trick.

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Favorites

Movie

Album

Book

City

Same pick

Game

Gemini 2.5 Pro ExperimentalGemini 2.5 Pro Experimental

200

2025

The Dark Side of

The Hitchh

Kyoto

Japan

Portal 2

Shooter, Puzzle

OpenAI o3OpenAI o3
No pick
No pick
No pick

Blade Runner

1982

No pick

No pick

Kyoto

Japan

No pick

Price and specs

Pick Gemini 2.5 Pro Experimental. In 174 blind votes, Gemini 2.5 Pro Experimental wins 77% of the time. That's not luck. Gemini 2.5 Pro Experimental wins 3 categories, Image Generation by the widest margin. Gemini 2.5 Pro Experimental costs 20x less per token.

Gemini 2.5 Pro Experimental and OpenAI o3 compared across 43 shared prompts
SpecGemini 2.5 Pro ExperimentalOpenAI o3
Win rate77%23%
Input price$1/M tokens$10/M tokens
Output price$2/M tokens$40/M tokens
Context window1.0M tokens—
ParametersNot disclosedNot disclosed
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedMar 2025Apr 2025
SWE-bench Verified63.8%69.1%
At 10M a month$10.00$10.00$100$100
1M10M100M1B10M tokens

Input tokens at list price. No caching, no batch discount.

Where to run it3 hosts
Gemini 2.5 Pro Experimental2 hosts
HostInOutContextUptime
  • Google Vertex AI$1.25 in·$10.00 out·1M·99.9% up
  • Google AI Studio$1.25 in·$10.00 out·1M·100% up
OpenAI o31 host
HostInOutContextUptime
  • OpenAI$2.00 in·$8.00 out·200k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 12 Oct 2026.

Common questions

What is the difference between Gemini 2.5 Pro Experimental and OpenAI o3?

Gemini 2.5 Pro Experimental is developed by Google AI while OpenAI o3 is developed by OpenAI. in 174 community votes on Rival, Gemini 2.5 Pro Experimental wins 77% of head-to-head matchups. These results are based on blind head-to-head voting across 43 challenges.

Which is better, Gemini 2.5 Pro Experimental or OpenAI o3?

Based on 174 community votes on Rival, Gemini 2.5 Pro Experimental wins 77% of head-to-head matchups against OpenAI o3. Gemini 2.5 Pro Experimental is strongest in Web Design, Image Generation, Reasoning.

How much does Gemini 2.5 Pro Experimental cost compared to OpenAI o3?

Gemini 2.5 Pro Experimental costs $1/M input tokens and OpenAI o3 costs $10/M input tokens. Gemini 2.5 Pro Experimental is $9.00/M cheaper per input. Gemini 2.5 Pro Experimental also wins more often in community votes, making it the better value.

How are Gemini 2.5 Pro Experimental vs OpenAI o3 votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 174 votes have been collected for this pair across 43 challenges. All vote data is part of Rival's open dataset.

More comparisons

Against the newest arrivals

  • Gemini 2.5 Pro Experimental vs GPT-4 TurboLanded Oct 2026
  • OpenAI o3 vs Step 5 PreviewLanded Oct 2026
  • Gemini 2.5 Pro Experimental vs Claude Haiku 5.5Landed Oct 2026
  • OpenAI o3 vs Ling 3.1 FlashLanded Oct 2026
  • Gemini 2.5 Pro Experimental vs Mistral Large 4Landed Oct 2026
  • OpenAI o3 vs GPT-6.1 SolLanded Sep 2026
  • Gemini 2.5 Pro Experimental vs Claude Sonnet 5.5Landed Sep 2026
  • OpenAI o3 vs Solar Mini 4Landed Sep 2026

Same lab, same size, long tail

  • Gemini 2.5 Pro Experimental vs Gemini 2.5 Flash PreviewVersion compare
  • Gemini 2.5 Pro Experimental vs Gemini 3.8 FlashSame lab
  • OpenAI o3 vs OpenAI o4-miniVersion compare
  • OpenAI o3 vs GPT-4 TurboSame lab
  • Gemini 2.5 Pro Experimental vs Llama 3 70BNew provider
  • OpenAI o3 vs Llama 4 MaverickSame size
  • OpenAI o3 vs Llama 4 ScoutNew provider
  • Gemini 2.5 Pro Experimental vs MercuryNew provider

Model pages

  • Gemini 2.5 Pro Experimental44 outputs, specs and price
  • OpenAI o358 outputs, specs and price
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