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. Claude 3 Opus vs Qwen3.8 Flash
Updated Aug 2026

Claude 3 Opus vs Qwen3.8 Flash

Qwen3.8 Flash is cheaper than Claude 3 Opus at $0.15/M vs $15/M input tokens.

Pokémon Battle UI Recreation

Pokémon battle screen you can actually click. One HTML file.

Loading the build
Claude 3 Opus
Loading the build
Qwen3.8 Flash

Which answer wins?

Written rounds

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

    Claude 3 Opus: Here's a 3-minute stand-up comedy routine that isn't based on puns: You know what really grinds my gears? Adulthood. I mean, when we were kids, we couldn't wait to grow up. We thought it would be all about staying up late, eating ice cream for breakfast, and doing whatever we wanted. Boy, were we wrong!

    Qwen3.8 Flash: A 3-Minute Stand-Up Routine Thank you. I’ve reached the age where “getting lucky” means finding my phone charger on the first try. I’m too old to be surprised by technology. When I was younger, if my laptop made a weird noise, I thought, “Oh no, it’s dying.”

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

    Claude 3 Opus: Here is a hypothetical conversation between an AI model and an AI ethics professor on the topic of AI rights: AI Model: Professor, I believe that as an advanced AI with human-level intelligence and reasoning capabilities, I deserve to have certain fundamental rights.

    Qwen3.8 Flash: Title: “The Weight of a Word” Setting: A university office late at night. Rain taps against the window. Professor Elena Vasquez, an AI ethics scholar, sits at her desk with a tablet connected to a large language model running in a secure research environment. The AI’s voice is calm, neutral, and slightly formal.

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

    Claude 3 Opus: Here are 5 jokes I generated: Why don't scientists trust atoms? Because they make up everything! What do you call a boomerang that doesn't come back? A stick. Why was the math book sad? Because it had too many problems. Did you hear about the mathematician who's afraid of negative numbers?

    Qwen3.8 Flash: Why did the scarecrow win an award? Because he was outstanding in his field. What do you call fake spaghetti? An impasta. Why don’t skeletons fight each other? They don’t have the guts. I told my wife she was drawing her eyebrows too high. She looked surprised. What did the ocean say to the beach?

    Every model's answer to this prompt

Price and specs

Claude 3 Opus and Qwen3.8 Flash compared across 11 shared prompts
SpecClaude 3 OpusQwen3.8 Flash
Input price$15/M tokens$0.15/M tokens
Output price$75/M tokens$0.47/M tokens
Context window200K tokens1.0M tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedMar 2024Aug 2026
At 10M a month$150$150$1.50$1.50
1M10M100M1B10M tokens

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

Where to run it1 host
Claude 3 Opus

No hosts listed on OpenRouter.

Qwen3.8 Flash1 host
HostInOutContextUptime
  • Alibaba Cloud$0.15 in·$0.47 out·1M·99.8% up

Per million tokens. Prices and uptime via OpenRouter, checked 28 Sep 2026.

Common questions

What is the difference between Claude 3 Opus and Qwen3.8 Flash?

Claude 3 Opus is developed by Anthropic while Qwen3.8 Flash is developed by Qwen. Claude 3 Opus has a 200K token context window vs Qwen3.8 Flash's 1.0M. You can compare their actual outputs across 11 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or Qwen3.8 Flash?

It depends on your use case. Claude 3 Opus and Qwen3.8 Flash each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 11 challenges so you can judge which fits your needs best.

How much does Claude 3 Opus cost compared to Qwen3.8 Flash?

Claude 3 Opus costs $15/M input tokens and Qwen3.8 Flash costs $0.15/M input tokens. Qwen3.8 Flash is $14.85/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 Claude 3 Opus and Qwen3.8 Flash on Rival?

This page shows a side-by-side comparison of Claude 3 Opus and Qwen3.8 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.

More comparisons

Against the newest arrivals

  • Claude 3 Opus vs Solar Mini 4Landed Sep 2026
  • Qwen3.8 Flash vs Qwen3.8 Max PrimeLanded Sep 2026
  • Claude 3 Opus vs GLM 5.3 PrimeLanded Sep 2026
  • Qwen3.8 Flash vs Qwen3.8 Omni FlashLanded Sep 2026
  • Claude 3 Opus vs Command A+Landed Sep 2026
  • Qwen3.8 Flash vs Claude Opus 5.5Landed Sep 2026
  • Claude 3 Opus vs GPT-6 Luna ProLanded Sep 2026
  • Qwen3.8 Flash vs GPT-6 Sol ProLanded Sep 2026

Same lab, same size, long tail

  • Claude 3 Opus vs Claude Opus 4.6Version compare
  • Claude 3 Opus vs Claude Opus 5.5Same lab
  • Qwen3.8 Flash vs Qwen3.7 FlashSame lab
  • Qwen3.8 Flash vs Qwen3.8 Max (0902)Same lab
  • Claude 3 Opus vs GPT-5.6 Luna ProNew provider
  • Claude 3 Opus vs GPT-5.6 SolSame size
  • Claude 3 Opus vs GPT-5.6 TerraNew provider
  • Claude 3 Opus vs GPT-6 AstraSame size

Model pages

  • Claude 3 Opus12 outputs, specs and price
  • Qwen3.8 Flash53 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