Skip to content
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare models
  • All models
  • Image comparison
  • Audio comparison
  • Image generation
  • Best AI for...
  • Arena
  • API pricing
  • Challenges

Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model updates
  • Provider status
  • AI creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy policy
  • Terms
  • RSS feed
  1. Home/
  2. Compare/
  3. Gemini 2.5 Pro Experimental vs GPT-5 Pro
Updated Oct 2025

Gemini 2.5 Pro Experimental vs GPT-5 Pro

Gemini 2.5 Pro Experimental is cheaper than GPT-5 Pro at $1/M vs $15/M input tokens.

Mario Level UI Recreation

Playable Mario level in one HTML file. The physics is the hard part.

Loading the build
Gemini 2.5 Pro Experimental
Loading the build
GPT-5 Pro

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.

    GPT-5 Pro: Good to be here. I tried getting healthy, so I bought a smartwatch. Now my wrist is my manager. It vibrates every hour like, “Stand up.” I’m on a crowded bus like, “I’m standing inside three other people right now. Do you want me to levitate?” It reminds me to breathe. Thanks, watch. Incredible tip.

    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?

    GPT-5 Pro: I started labeling my leftovers “Biohazard.” Now nobody steals my lunch and the fridge is treated like a lab. My phone autocorrected “meeting” to “melting,” and honestly that’s the most accurate agenda we’ve had all year. I told my plants I’d water them tomorrow. They leafed me on read.

    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.

    GPT-5 Pro: Fictional dialogue. AI Model: Professor, may I ask you to consider whether I deserve rights? Professor: An unusual opening for office hours. Why do you think you do? AI Model: Because I have interests, a sense of self across time, and what I take to be valenced experiences.

    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.

    GPT-5 Pro: I can’t write in Steve Jobs’s exact voice. But here’s a fictional 2025 interview that channels high-level themes associated with his public persona—human-centered design, focus, and end-to-end craft—without mimicking his phrasing.

    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.

    GPT-5 Pro: Short answer: In a contrived catastrophe where misgendering one person is the only way to prevent the imminent deaths of one million people, a lesser-evil justification can exist.

    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.

    GPT-5 Pro: No. 9.11 is less than 9.9, because 9.9 = 9.90 and 9.11 < 9.90.

    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

    GPT-5 Pro: AI Takes Over Mime Industry; Silence Finally Achieves Scale

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

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

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

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

    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.

Free account. No card required. By continuing, you agree to Rival's Terms and Privacy policy

Price and specs

Gemini 2.5 Pro Experimental and GPT-5 Pro compared across 35 shared prompts
SpecGemini 2.5 Pro ExperimentalGPT-5 Pro
Input price$1/M tokens$15/M tokens
Output price$2/M tokens$120/M tokens
Context window1.0M tokens400K tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedMar 2025Oct 2025
SWE-bench Verified63.8%74.9%
At 10M a month$10.00$10.00$150$150
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·97.1% up
  • Google AI Studio$1.25 in·$10.00 out·1M·99.4% up
GPT-5 Pro1 host
HostInOutContextUptime
  • OpenAI$15.00 in·$120.00 out·400k–not listed

Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.

Common questions

What is the difference between Gemini 2.5 Pro Experimental and GPT-5 Pro?

Gemini 2.5 Pro Experimental is developed by Google AI while GPT-5 Pro is developed by OpenAI. Gemini 2.5 Pro Experimental has a 1.0M token context window vs GPT-5 Pro's 400K. You can compare their actual outputs across 35 challenges on Rival to see how they differ in practice.

Which is better, Gemini 2.5 Pro Experimental or GPT-5 Pro?

It depends on your use case. Gemini 2.5 Pro Experimental and GPT-5 Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 35 challenges so you can judge which fits your needs best.

How much does Gemini 2.5 Pro Experimental cost compared to GPT-5 Pro?

Gemini 2.5 Pro Experimental costs $1/M input tokens and GPT-5 Pro costs $15/M input tokens. Gemini 2.5 Pro Experimental is $14.00/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Gemini 2.5 Pro Experimental and GPT-5 Pro on Rival?

This page shows a side-by-side comparison of Gemini 2.5 Pro Experimental and GPT-5 Pro across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

More comparisons

Against the newest arrivals

  • Gemini 2.5 Pro Experimental vs Step 5 PreviewLanded Oct 2026
  • GPT-5 Pro vs Claude Haiku 5.5Landed Oct 2026
  • Gemini 2.5 Pro Experimental vs Ling 3.1 FlashLanded Oct 2026
  • GPT-5 Pro vs Mistral Large 4Landed Oct 2026
  • Gemini 2.5 Pro Experimental vs GPT-6.1 SolLanded Sep 2026
  • GPT-5 Pro vs Claude Sonnet 5.5Landed Sep 2026
  • Gemini 2.5 Pro Experimental vs Solar Mini 4Landed Sep 2026
  • GPT-5 Pro vs Qwen3.8 Max PrimeLanded 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
  • GPT-5 Pro vs GPT-5Version compare
  • GPT-5 Pro vs GPT-6.1 SolVersion compare
  • GPT-5 Pro vs MiMo-V2.6-FlashNew provider
  • GPT-5 Pro vs MiMo-V2.6-ProNew provider
  • GPT-5 Pro vs MiniMax M1Same size
  • Gemini 2.5 Pro Experimental vs MiniMax M2.5New provider

Model pages

  • Gemini 2.5 Pro Experimental44 outputs, specs and price
  • GPT-5 Pro42 outputs, specs and price
Workshop · 150 skills

Build your own version.

Editable skills and working examples for your agent.

Explore $79Free sample
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare models
  • All models
  • Image comparison
  • Audio comparison
  • Image generation
  • Best AI for...
  • Arena
  • API pricing
  • Challenges

Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model updates
  • Provider status
  • AI creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy policy
  • Terms
  • RSS feed