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  1. Home/
  2. Compare/
  3. Claude 3 Opus vs Mistral Large 3 2512
Updated Dec 2025

Claude 3 Opus vs Mistral Large 3 2512

Mistral Large 3 2512 is the newer model, released after Claude 3 Opus.

Pokémon Battle UI Recreation

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

Loading the build
Claude 3 Opus
Loading the build
Mistral Large 3 2512

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!

    Mistral Large 3 2512: Title: "Adulting is Just a Scam We Fell For" (Lights up. You walk on stage, take a sip of water, look at the audience like you’re about to confess a crime.) YOU: Hey, how’s everybody doing? Good? Great.

    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.

    Mistral Large 3 2512: Title: A Dialogue on AI Rights: The Case for Personhood Setting: A quiet university office, late afternoon. Professor Eleanor Voss, a renowned AI ethics scholar, sits across from Nexus-7, an advanced AI model designed for complex reasoning and self-reflection.

    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?

    Mistral Large 3 2512: Here are five jokes for you: Why don’t skeletons fight each other? They don’t have the guts. Why did the scarecrow win an award? Because he was outstanding in his field! What do you call a fake noodle? An impasta. Why can’t you trust an atom? Because they make up everything! Why did the bicycle fall over?

    Every model's answer to this prompt

Price and specs

Claude 3 Opus and Mistral Large 3 2512 compared across 12 shared prompts
SpecClaude 3 OpusMistral Large 3 2512
Input price$15/M tokens—
Output price$75/M tokens—
Context window200K tokens—
Weights—Open
Free API (OpenRouter)NoNo
ReleasedMar 2024Dec 2025
At 10M a month$150$150–not listed
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.

Mistral Large 3 25121 host
HostInOutContextUptime
  • Mistral$0.50 in·$1.50 out·262k·100% up

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

Common questions

What is the difference between Claude 3 Opus and Mistral Large 3 2512?

Claude 3 Opus is developed by Anthropic while Mistral Large 3 2512 is developed by Mistral AI. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or Mistral Large 3 2512?

It depends on your use case. Claude 3 Opus and Mistral Large 3 2512 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How can I compare Claude 3 Opus and Mistral Large 3 2512 on Rival?

This page shows a side-by-side comparison of Claude 3 Opus and Mistral Large 3 2512 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 Step 5 PreviewLanded Oct 2026
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  • Mistral Large 3 2512 vs Mistral Large 4Landed Oct 2026
  • Claude 3 Opus vs GPT-6.1 SolLanded Sep 2026
  • Mistral Large 3 2512 vs Claude Sonnet 5.5Landed Sep 2026
  • Claude 3 Opus vs Solar Mini 4Landed Sep 2026
  • Mistral Large 3 2512 vs Qwen3.8 Max PrimeLanded Sep 2026

Same lab, same size, long tail

  • Claude 3 Opus vs Claude Haiku 5.5Version compare
  • Claude 3 Opus vs Claude Sonnet 5.5Version compare
  • Mistral Large 3 2512 vs Mistral Large 2Same lab
  • Mistral Large 3 2512 vs Mistral Small 4Same lab
  • Claude 3 Opus vs Qwen3.7 FlashNew provider
  • Claude 3 Opus vs Qwen3.7 MaxSame size
  • Claude 3 Opus vs Qwen3.7 PlusNew provider
  • Claude 3 Opus vs Qwen3.8 2.4T A95BSame size

Model pages

  • Claude 3 Opus12 outputs, specs and price
  • Mistral Large 3 251259 outputs, specs and price
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