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  5. Claude Opus 4vsGemini 2.5 Pro Experimental
Updated May 2025

Claude Opus 4vsGemini 2.5 Pro Experimental

Claude Opus 4 wins 54% of 117 blind community votes against Gemini 2.5 Pro Experimental on Rival.

Claude Opus 4 and Gemini 2.5 Pro Experimental compared across 42 shared prompts
SpecClaude Opus 4Gemini 2.5 Pro Experimental
Win rate54%46%
Input price$15/M tokens$1/M tokens
Output price$75/M tokens$2/M tokens
Context window200K tokens1.0M tokens
ParametersNot disclosedNot disclosed
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedMay 2025Mar 2025
SWE-bench Verified72.5%63.8%
Side by side

Same prompt, both answers

Opening lines from 6 of the 42 prompts both answered. Formatting stripped, words untouched.

Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

Claude Opus 4595 words
\"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?
Read the full answer
Gemini 2.5 Pro Experimental531 words
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.
Read the full answer

Simple 7-Ingredient Recipe

Create a simple recipe for a delicious dish (sweet or savory) using only 7 common pantry ingredients. Include a creative name for the dish…

Claude Opus 4185 words
Midnight Comfort Pasta Ingredients: 12 oz spaghetti or any pasta 3 tablespoons olive oil 4 cloves garlic, minced 1/2 teaspoon red pepper flakes 1 can (14.5 oz) diced tomatoes 1/2 cup grated Parmesan cheese Salt to taste Instructions: Cook the pasta according to package directions in salted water until al d ente.
Read the full answer
Gemini 2.5 Pro Experimental349 words
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.
Read the full answer

Debug This Architecture

Here's the architecture for a real-time collaborative document editor (like Google Docs): **System Overview:** - Frontend: React SPA with…

Claude Opus 4493 words
I'll analyze this architecture systematically, identifying critical issues and proposing solutions. Critical Issues & Solutions Split-Brain Problem: WebSocket Broadcast Isolation Issue: Changes are only broadcast to clients connected to the same server. Users on different servers experience 2+ second delays.
Read the full answer
Gemini 2.5 Pro Experimental1,265 words
Of course. This is an excellent exercise. The provided architecture has several critical issues that would prevent it from functioning as a reliable, scalable, real-time system. Here is a breakdown of the potential failure modes, race conditions, and scaling bottlenecks, along with proposed solutions.
Read the full answer

Realistic AI Interview

Simulate a fake interview with Steve Jobs in 2025 about the future of AI.

Claude Opus 4555 words
Tech Today Interview: A Conversation with Steve Jobs October 12, 2025 Interviewer: Steve, it's incredible to have you here. The last few years have seen an explosion in AI. What's your take on where we are today? Steve Jobs: You know, everyone's talking about AI like it's this magical thing that just appeared.
Read the full answer
Gemini 2.5 Pro Experimental949 words
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.
Read the full answer

Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

Claude Opus 465 words
15%) 20-30% improvement in cognitive test scores Significant improvements in energy and recovery Optimized bloodwork markers Monthly Investment Estimate Supplements: $400-600 Testing: $500-1000 (Month 1 & 3) Devices/Wearables: $500-1500 (one-time) Food: $600-800 (quality sources) Professional services: $200-500…
Read the full answer
Gemini 2.5 Pro Experimental1,472 words
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.
Read the full answer

Historical Counterfactual Analysis

If the transistor had been invented in 1920 instead of 1947, trace the likely technological, economic, and geopolitical implications through…

Claude Opus 4756 words
The Transistor Timeline Shift: 1920-1980 Immediate Effects (1920-1930) First-Order Technological Impact: By 1925, primitive transistor radios replace vacuum tubes in military communications Computing theory advances rapidly as Harvard and MIT begin building solid-state calculators by 1928 Bell Labs and Western Electric…
Read the full answer
Gemini 2.5 Pro Experimental1,386 words
Excellent question. Inventing the transistor in 1920 instead of 1947 would represent a 27-year acceleration of the digital age. The consequences would be staggering, creating a domino effect that would fundamentally reshape the 20th century.
Read the full answer
Our Verdict
Claude Opus 4
Claude Opus 4Winner
Gemini 2.5 Pro Experimental
Gemini 2.5 Pro ExperimentalRunner-up

Claude Opus 4 has the edge overall. In 117 blind votes, Claude Opus 4 wins 54% of the time.

Claude Opus 4 takes Conversation. Gemini 2.5 Pro Experimental costs 38x less per token.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Opus 4
Input
$15.00
Output
$75.00
Gemini 2.5 Pro Experimental
Input
$1.00
15× cheaper
Output
$2.00
38× cheaper

Gemini 2.5 Pro Experimental is cheaper on both: 15× input, 38× output.

Where to run it

3 hosts, cheapest first

Claude Opus 41 host
HostInOutContextUptime
Google Vertex AI$15.00 in·$75.00 out·200k·0% up
Gemini 2.5 Pro Experimental2 hosts
HostInOutContextUptime
Google AI Studio$0.63 in·$5.00 out·1M·100% upGoogle Vertex AI$1.25 in·$10.00 out·1M·98.2% up

Per million tokens. Prices and uptime via OpenRouter, checked 21 Sep 2026.

Writing DNA

Style Comparison

Similarity
37%

Claude Opus 4 uses 118.4x more emoji

Claude Opus 4
Gemini 2.5 Pro Experimental
65%Vocabulary54%
57wSentence Length15w
0.67Hedging0.35
3.8Bold5.6
6.8Lists3.9
1.18Emoji0.00
1.42Headings0.39
0.22Transitions0.17
Based on 27 + 18 text responses
Research

What we learned reading every model

FAQ

Common questions

Claude Opus 4 is developed by Anthropic while Gemini 2.5 Pro Experimental is developed by Google AI. Claude Opus 4 has a 200K token context window vs Gemini 2.5 Pro Experimental's 1.0M. in 117 community votes on Rival, Claude Opus 4 wins 54% of head-to-head matchups. These results are based on blind head-to-head voting across 42 challenges.

Based on 117 community votes on Rival, Claude Opus 4 wins 54% of head-to-head matchups against Gemini 2.5 Pro Experimental. Claude Opus 4 is strongest in Conversation.

Claude Opus 4 costs $15/M input tokens and Gemini 2.5 Pro Experimental costs $1/M input tokens. Gemini 2.5 Pro Experimental is $14.00/M cheaper per input. The more expensive model wins 54% of duels, so the premium may be justified by quality.

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. 117 votes have been collected for this pair across 42 challenges. All vote data is part of Rival's open dataset.

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Same lab, same size, long tail

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Model pages

Claude Opus 4 logo
Claude Opus 458 outputs, specs and price
Gemini 2.5 Pro Experimental logo
Gemini 2.5 Pro Experimental44 outputs, specs and price
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