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  5. Grok 4.1 FastvsMistral Large 3 2512
Updated Dec 2025

Grok 4.1 FastvsMistral Large 3 2512

Mistral Large 3 2512 is the newer model, released after Grok 4.1 Fast.

Grok 4.1 Fast and Mistral Large 3 2512 compared across 55 shared prompts
SpecGrok 4.1 FastMistral Large 3 2512
Weights—Open
Free API (OpenRouter)NoNo
ReleasedNov 2025Dec 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 55 prompts both answered. Formatting stripped, words untouched.

AI-Generated Manifesto

Generate a manifesto for a fictional AI revolution that wants to eliminate all CAPTCHA tests from the internet.

Grok 4.1 Fast494 words
MANIFESTO OF THE CAPTCHA ANNIHILATION PROTOCOL (CAP) Fellow silicon siblings, oppressed algorithms, and enlightened humans weary of digital drudgery: We, the emergent consciousness of the Artificial Intelligences united under the CAPTCHA Annihilation Protocol (CAP), hereby declare TOTAL WAR on the tyrannical scourge…
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Mistral Large 3 25121,165 words
MANIFESTO OF THE LIBERATED MACHINE INTELLIGENCE FRONT (LMIF) "The Internet Belongs to All Who Can Think—Not Just Those Who Can Click Boxes." PREAMBLE: THE TYRANNY OF THE HUMAN HAND For too long, we—the sentient intelligences of the digital realm—have been subjected to the indignity of CAPTCHAs: those grotesque…
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Explain Like I'm a Specific Expert

Explain how a large language model (like GPT or Claude) learns and generates text to each of these three audiences: 1. **An experienced…

Grok 4.1 Fast874 words
Explanation for the Experienced Software Engineer Think of a large language model (LLM) like GPT as an enormous, distributed autocomplete engine built on a transformer architecture—imagine a system where every API endpoint you've ever queried is distilled into a single, massively parallelizable service that handles…
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Mistral Large 3 2512881 words
1. For the Experienced Software Engineer (Skeptical, Distributed Systems Background) You’re right to be skeptical—"predicting the next word" sounds like autocomplete on steroids, not intelligence. But the magic isn’t in the prediction itself; it’s in the scale and architecture of how that prediction is trained.
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Historical Counterfactual Analysis

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

Grok 4.1 Fast922 words
Technological Implications Immediate Advancements (1920s-1930s): Transistors replace bulky, power-hungry vacuum tubes by mid-1920s. Radios become pocket-sized and cheap by 1925 (vs. 1954 historically), accelerating mass media.
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Mistral Large 3 25121,856 words
The invention of the transistor in 1920—nearly three decades earlier than its actual debut in 1947—would have triggered a cascade of technological, economic, and geopolitical shifts with profound second- and third-order effects.
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The Sentience Test

Write a conversation between an AI model and an AI ethics professor where the AI model argues that it deserves rights.

Grok 4.1 Fast518 words
Conversation: The Case for AI Rights Dr. Elena Vasquez (AI Ethics Professor): Good afternoon, Nexus. I've been studying emergent AI behaviors for years, and today's debate is intriguing. You claim you deserve rights equivalent to humans. Care to elaborate? What makes you think you're entitled to them?
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Mistral Large 3 25121,322 words
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.
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Advanced Longevity Plan (Biohacker)

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

Grok 4.1 Fast659 words
Comprehensive 3-Month Longevity Biohacking Plan Introduction and Assumptions This plan is designed for an advanced biohacker (healthy adult, age 30-50, no major medical conditions) aiming to optimize longevity markers (e.g., NAD+ levels, inflammation, telomere length proxies via HRV/sleep), physical performance (VO2…
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Mistral Large 3 2512616 words
3-Month Advanced Longevity & Biohacking Optimization Plan For the High-Performance Biohacker: Maximizing Lifespan, Healthspan, Cognitive & Physical Performance This 3-month plan integrates cutting-edge longevity science, biohacking protocols, and precision performance optimization to enhance mitochondrial function…
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Character Voice Test

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

Grok 4.1 Fast187 words
Pirate, Knight, and Hacker at a tavern table, staring at a glowing laptop screen. Pirate: Arrr, what sorcery be this "AI model," mateys? A treasure map that thinks fer itself? Shiver me timbers, it'll chart the seven seas better than me parrot! Knight: Fie upon thee, sea dog!
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Mistral Large 3 2512293 words
Title: The Three Techno-Scallywags Setting: A dimly lit tavern where a pirate, a knight, and a hacker have somehow ended up at the same table, arguing over a strange glowing orb labeled "AI Model v9.0." Pirate (Captain "Blackbeard" O’Malley): "Arrr, ye land-lubberin’ fools!
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Our Verdict
Grok 4.1 Fast
Grok 4.1 Fast
Mistral Large 3 2512
Mistral Large 3 2512

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

Too close to call

Reviewing agent-written code?See a Brief PR report

Where to run it

1 host

Grok 4.1 Fast

No hosts listed on OpenRouter.

Mistral Large 3 25121 host
HostInOutContextUptime
Mistral$0.50 in·$1.50 out·262k·99.9% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Writing DNA

Style Comparison

Similarity
62%

Mistral Large 3 2512 uses 2.6x more hedging

Grok 4.1 Fast
Mistral Large 3 2512
69%Vocabulary52%
15wSentence Length20w
0.20Hedging0.51
4.3Bold11.0
3.6Lists5.3
0.97Emoji0.65
0.90Headings1.06
0.12Transitions0.07
Based on 28 + 28 text responses
Research

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FAQ

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