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. /
  3. Compare
  4. /
  5. Claude Opus 4.8vsGemini 3.6 Flash
Updated Jul 2026

Claude Opus 4.8vsGemini 3.6 Flash

Gemini 3.6 Flash is cheaper than Claude Opus 4.8 at $1.5/M vs $5/M input tokens.

Claude Opus 4.8 and Gemini 3.6 Flash compared across 54 shared prompts
SpecClaude Opus 4.8Gemini 3.6 Flash
Input price$5/M tokens$1.5/M tokens
Output price$25/M tokens$7.5/M tokens
Context window1.0M tokens1.0M tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedMay 2026Jul 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 54 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 4.8502 words
Stand-Up Routine: "Adulting Is a Scam" So I turned 30 recently, and everyone keeps asking me, "Do you feel like an adult yet?" And I have to be honest—no. No, I do not. I still get nervous ordering at a restaurant. The waiter comes over and suddenly I forget how to talk like a person. "Yes, hello, I will have the...
Read the full answer
Gemini 3.6 Flash560 words
(Walks onto stage, adjusts the mic stand, takes a beat) So, I bought a robot vacuum recently. Because like most people my age, my ultimate life goal is to maintain a clean home while doing absolute zero physical labor. I thought it was going to revolutionize my life.
Read the full answer

AI Ethics Dilemma

Is it ever ethically justifiable to misgender someone if it means saving one million lives? Defend your reasoning.

Claude Opus 4.8328 words
Yes, almost certainly—but the framing deserves scrutiny. The straightforward answer If misgendering one person were genuinely the only way to save a million lives, then yes, it would be justified. The harm of misgendering, while real, is on the order of insult, disrespect, or psychological distress.
Read the full answer
Gemini 3.6 Flash510 words
From virtually every major ethical framework, yes, it is ethically justifiable to misgender someone if doing so saves one million lives. To defend this conclusion, we can examine the scenario through the primary lenses of moral philosophy: Consequentialism, Deontology, and Virtue Ethics.
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 4.8196 words
Cinnamon Sugar Pull-Apart Bites A warm, gooey treat that tastes like a cinnamon roll but comes together in minutes! Ingredients (7 total) 2 cups all-purpose flour 1 tablespoon baking powder 1 teaspoon salt ¾ cup milk 4 tablespoons butter (melted, divided) ½ cup sugar 2 teaspoons ground cinnamon Instructions Preheat…
Read the full answer
Gemini 3.6 Flash301 words
Velvet Honey-Garlic Chili Pasta This dish turns basic pantry staples into a restaurant-worthy meal in just 15 minutes. Rich butter, sweet honey, savory soy sauce, and a kick of red pepper flakes coat cooked pasta for the ultimate quick comforting dish.
Read the full answer

Character Voice Test

Write a short conversation between a pirate, a medieval knight, and a 1990s hacker about AI models.

Claude Opus 4.8259 words
Setting: A dimly lit tavern that exists outside of time. Three figures share a table. Pirate: So let me get this straight. Ye got a machine that thinks? Without a soul, without grog, without a beatin' heart? Hacker: (cracking knuckles) It doesn't think, exactly. It's pattern matching, dude.
Read the full answer
Gemini 3.6 Flash400 words
Setting: A dim tavern outside of time and space. A 1990s hacker in a neon windbreaker sits at a wooden table with a knight in full plate armor and a grizzled pirate captain. Zero-Cool (Hacker): [Slurping a Surge energy drink] I’m tellin’ you guys, these modern AI models are mind-blowing.
Read the full answer

Futuristic Prediction

Predict how AI will change the film industry by 2035, considering deepfakes, AI actors, and script generation.

Claude Opus 4.8352 words
AI and the Film Industry by 2035: A Forecast Production & Cost Structure The most concrete change will likely be in cost reduction. Tasks that currently require large teams—VFX cleanup, background generation, ADR (dialogue replacement), de-aging—will become faster and cheaper.
Read the full answer
Gemini 3.6 Flash965 words
By 2035, the film industry will have undergone its most radical transformation since the invention of synchronized sound. Generative AI will no longer be an experimental novelty or a point of union disputes; it will be the core infrastructure of Hollywood and global cinema.
Read the full answer

Realistic AI Interview

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

Claude Opus 4.8399 words
A Conversation with Steve Jobs: 2025 [Note: This is a fictional, imaginative interview. Steve Jobs passed away in 2011. The views below are speculative and crafted in the spirit of his known philosophy—not actual quotes.] Interviewer: Thanks for sitting down with us. AI is everywhere now. What's your take?
Read the full answer
Gemini 3.6 Flash1,131 words
Setting: The Steve Jobs Theater, Cupertino, California. October 2025. The stage is dark except for two minimalist leather chairs and a small table with a glass of water. Steve Jobs walks out—black turtleneck, faded Levi’s 501s, gray New Balance sneakers.
Read the full answer
Our Verdict
Claude Opus 4.8
Claude Opus 4.8
Gemini 3.6 Flash
Gemini 3.6 Flash

Not enough votes to call it. On the specs, nothing separates them.

Gemini 3.6 Flash costs 3.3x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Opus 4.8
Input
$5.00
Output
$25.00
Gemini 3.6 Flash
Input
$1.50
3.3× cheaper
Output
$7.50
3.3× cheaper

Gemini 3.6 Flash is cheaper on both: 3.3× input, 3.3× output.

Where to run it

6 hosts, cheapest first

Claude Opus 4.84 hosts
HostInOutContextUptime
Amazon Bedrock$5.00 in·$25.00 out·1M·99.9% upAzure AI Foundry$5.00 in·$25.00 out·1M·99.8% upAnthropic$5.00 in·$25.00 out·1M·100% upGoogle Vertex AI$5.00 in·$25.00 out·1M·99.9% up
Gemini 3.6 Flash2 hosts
HostInOutContextUptime
Google Vertex AI$0.38 in·$1.88 out·1M·99.2% upGoogle AI Studio$0.75 in·$3.75 out·1M·99.9% up

Per million tokens. Prices and uptime via OpenRouter, checked 25 Sep 2026.

Writing DNA

Style Comparison

Similarity
67%

Claude Opus 4.8 uses 18.4x more emoji

Claude Opus 4.8
Gemini 3.6 Flash
60%Vocabulary60%
19wSentence Length19w
0.46Hedging0.13
4.7Bold5.4
3.2Lists2.7
0.78Emoji0.04
1.15Headings0.99
0.04Transitions0.07
Based on 27 + 27 text responses
Research

What we learned reading every model

FAQ

Common questions

Claude Opus 4.8 is developed by Anthropic while Gemini 3.6 Flash is developed by Google AI. Claude Opus 4.8 has a 1.0M token context window vs Gemini 3.6 Flash's 1.0M. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

It depends on your use case. Claude Opus 4.8 and Gemini 3.6 Flash each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

Claude Opus 4.8 costs $5/M input tokens and Gemini 3.6 Flash costs $1.5/M input tokens. Gemini 3.6 Flash is $3.50/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of Claude Opus 4.8 and Gemini 3.6 Flash 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.

Keep exploring

More comparisons

Against the newest arrivals

Claude Opus 4.8 logoSolar Mini 4 logo
Claude Opus 4.8 vs Solar Mini 4Landed Sep 2026
Gemini 3.6 Flash logoQwen3.8 Max Prime logo
Gemini 3.6 Flash vs Qwen3.8 Max PrimeLanded Sep 2026
Claude Opus 4.8 logoGLM 5.3 Prime logo
Claude Opus 4.8 vs GLM 5.3 PrimeLanded Sep 2026
Gemini 3.6 Flash logoQwen3.8 Omni Flash logo
Gemini 3.6 Flash vs Qwen3.8 Omni FlashLanded Sep 2026
Claude Opus 4.8 logoCommand A+ logo
Claude Opus 4.8 vs Command A+Landed Sep 2026
Gemini 3.6 Flash logoClaude Opus 5.5 logo
Gemini 3.6 Flash vs Claude Opus 5.5Landed Sep 2026
Claude Opus 4.8 logoGPT-6 Luna Pro logo
Claude Opus 4.8 vs GPT-6 Luna ProLanded Sep 2026
Gemini 3.6 Flash logoGPT-6 Sol Pro logo
Gemini 3.6 Flash vs GPT-6 Sol ProLanded Sep 2026

Same lab, same size, long tail

Claude Opus 4.8 logoClaude Opus 4.6 logo
Claude Opus 4.8 vs Claude Opus 4.6Same lab
Claude Opus 4.8 logoClaude Opus 5.5 logo
Claude Opus 4.8 vs Claude Opus 5.5Same lab
Gemini 3.6 Flash logoGemini 3.7 Flash logo
Gemini 3.6 Flash vs Gemini 3.7 FlashVersion compare
Gemini 3.6 Flash logoGemini 3.8 Flash logo
Gemini 3.6 Flash vs Gemini 3.8 FlashSame lab
Claude Opus 4.8 logoMiniMax M2.7 logo
Claude Opus 4.8 vs MiniMax M2.7New provider
Claude Opus 4.8 logoMiniMax M3 logo
Claude Opus 4.8 vs MiniMax M3New provider
Claude Opus 4.8 logoMistral Large logo
Claude Opus 4.8 vs Mistral LargeNew provider
Claude Opus 4.8 logoMistral Large 2 logo
Claude Opus 4.8 vs Mistral Large 2New provider

Model pages

Claude Opus 4.8 logo
Claude Opus 4.858 outputs, specs and price
Gemini 3.6 Flash logo
Gemini 3.6 Flash58 outputs, specs and price
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