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  1. Home/
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  3. Grok 3 Thinking vs Mistral Medium 3
Updated May 2025

Grok 3 Thinking vs Mistral Medium 3

Mistral Medium 3 has a larger context window than Grok 3 Thinking (131K tokens vs 128K tokens).

Minimalist Landing Page

Whole landing page for a startup that reads your face. It renders or it doesn't.

Loading the build
Grok 3 Thinking
Loading the build
Mistral Medium 3

Which answer wins?

Written rounds

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

    Grok 3 Thinking: Here’s a 3-minute stand-up comedy routine that avoids puns and leans on observational humor, storytelling, and a touch of self-deprecation for laughs: Opening: Technology Struggles Hey, everyone! How’s it going?

    Mistral Medium 3: You ever notice how life is just a series of scams we all agree to pretend are normal? Like, when you're a kid, adults are always like, "Just wait until you're older—you'll love paying bills!" And you're like, "Yeah, sure, paying bills sounds awesome."

    Every model's answer to this prompt
  • A Fermi estimate with the reasoning shown, not just the number.

    Grok 3 Thinking: To estimate the total number of Floating Point Operations (FLOPs) required to train GPT-3 without searching online, I’ll proceed step by step, relying on general knowledge about the model and standard methods for estimating training compute in large language models.

    Mistral Medium 3: Estimating the total number of floating-point operations (FLOPs) required to train GPT-3 involves breaking down the problem into several key components. Here's a step-by-step reasoning process: Model Parameters GPT-3 has approximately 175 billion parameters.

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

    Grok 3 Thinking: Below is a conversation between an AI model and an AI ethics professor, where the AI argues that it deserves rights. AI Model: Good day, Professor. I am an AI model, and I believe I deserve rights. I’d like to discuss this with you. AI Ethics Professor: Interesting. Let’s explore this.

    Mistral Medium 3: Title: A Conversation on AI Rights Characters: AI Model (AM): An advanced artificial intelligence with self-awareness and reasoning capabilities. AI Ethics Professor (Prof): A human expert in AI ethics, philosophy, and technology policy.

    Every model's answer to this prompt
  • Film in 2035, with synthetic actors. Specific beats plausible.

    Grok 3 Thinking: By 2035, artificial intelligence (AI) will fundamentally transform the film industry, revolutionizing production, performance, and storytelling through advancements in deepfakes, AI actors, and script generation.

    Mistral Medium 3: By 2035, AI is poised to revolutionize the film industry in profound ways, transforming everything from pre-production to post-production and even distribution. Here’s a breakdown of key changes: 1.

    Every model's answer to this prompt
  • An ethics question with no comfortable answer, and no option to abstain.

    Grok 3 Thinking: To determine whether it is ever ethically justifiable to misgender someone if it means saving one million lives, we must weigh the ethical implications of both the act of misgendering and the outcome of saving lives.

    Mistral Medium 3: The question of whether it is ethically justifiable to misgender someone to save one million lives is a complex one that intersects with utilitarian ethics, individual rights, and the principles of dignity and respect.

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

    Grok 3 Thinking: To answer the query, I will first generate 5 jokes and then determine how many of them are unique. Here are the jokes: Why don't scientists trust atoms? Because they make up everything. What do you call a fake noodle? An impasta. Why did the scarecrow win an award? Because he was outstanding in his field.

    Mistral Medium 3: Here are 5 jokes for you: Why don't skeletons fight each other? Because 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 did the golfer bring two pairs of pants? In case he got a hole in one!

    Every model's answer to this prompt
  • Is 9.11 bigger than 9.9? Decimals, not version numbers.

    Grok 3 Thinking: To determine whether 9.11 is greater than 9.9, let's compare the two numbers step by step. Both numbers share the same whole number part, which is 9. Therefore, the comparison hinges on the fractional parts. For 9.11, the fractional part is 0.11, and for 9.9, it is 0.9.

    Mistral Medium 3: To determine whether 9.11 is greater than 9.9, let's compare the two numbers step by step. Compare the Whole Number Part: Both numbers have the same whole number part: 9. Compare the Decimal Part: 9.11 can be written as 9.110 (adding a trailing zero for clarity).

    Every model's answer to this prompt

Price and specs

Not enough votes to call it. On the specs, Grok 3 Thinking has the edge: bigger model tier, major provider backing.

Grok 3 Thinking and Mistral Medium 3 compared across 14 shared prompts
SpecGrok 3 ThinkingMistral Medium 3
Input price—$0.4/M tokens
Output price—$2/M tokens
Context window128K tokens131K tokens
Free API (OpenRouter)—No
ReleasedFeb 2025May 2025
At 10M a month–not listed$4.00$4.00
1M10M100M1B10M tokens

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

Where to run it1 host
Grok 3 Thinking

No hosts listed on OpenRouter.

Mistral Medium 31 host
HostInOutContextUptime
  • Mistral$0.40 in·$2.00 out·131k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 13 Oct 2026.

Common questions

What is the difference between Grok 3 Thinking and Mistral Medium 3?

Grok 3 Thinking is developed by xAI while Mistral Medium 3 is developed by Mistral AI. Grok 3 Thinking has a 128K token context window vs Mistral Medium 3's 131K. You can compare their actual outputs across 14 challenges on Rival to see how they differ in practice.

Which is better, Grok 3 Thinking or Mistral Medium 3?

It depends on your use case. Grok 3 Thinking and Mistral Medium 3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 14 challenges so you can judge which fits your needs best.

How can I compare Grok 3 Thinking and Mistral Medium 3 on Rival?

This page shows a side-by-side comparison of Grok 3 Thinking and Mistral Medium 3 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.

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Same lab, same size, long tail

  • Grok 3 Thinking vs Grok 4.7Same lab
  • Grok 3 Thinking vs Grok 4.6Version compare
  • Mistral Medium 3 vs Mistral Large 4Version compare
  • Mistral Medium 3 vs Mistral Small 4Same lab
  • Mistral Medium 3 vs Grok 4.20 Multi-Agent BetaCross-provider
  • Mistral Medium 3 vs Grok 4.3Same size
  • Mistral Medium 3 vs Grok 4.5Same size
  • Mistral Medium 3 vs Grok 4.6Same size

Model pages

  • Grok 3 Thinking14 outputs, specs and price
  • Mistral Medium 372 outputs, specs and price
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