Updated Nov 24, 2025

Our Verdict

Claude Opus 4.5Winner

Mistral Medium 3Runner-up

Pick Claude Opus 4.5. In 5 blind votes, Claude Opus 4.5 wins 75% of the time. That's not luck.

Claude Opus 4.5 particularly excels in Reasoning.

Clear winner

Writing DNA

Style Comparison

Similarity

97%

Claude Opus 4.5 uses 3.2x more sentence length

Claude Opus 4.5

Mistral Medium 3

64%Vocabulary57%

55wSentence Length17w

0.86Hedging0.73

5.8Bold8.6

4.5Lists6.5

0.15Emoji0.06

1.59Headings1.18

0.05Transitions0.15

Based on 24 + 15 text responses

vs

Ask them anything yourself

Claude Opus 4.5

Mistral Medium 3

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026

Free preview13 of 58 slides

Download the free preview or get all 58 slides for $49

FAQ

Common questions

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Claude Opus 4.5 vs MiniMax M2.5New provider

Mistral Medium 3 vs Pony AlphaNew provider

Claude Opus 4.5 vs Grok 3New provider

Claude Opus 4.5vsMistral Medium 3

27 fights queued

Why Claude Opus 4.5?

7 months newerNov 2025

Why Mistral Medium 3?

Dead even. This one's a coin flip.

Claude Opus 4.5Mistral Medium 3

Input price

—

$0.40/M

Output price

—

$2.00/M

Context

—

131K

Released

Nov 2025

May 2025

Favorites

Claude Opus 4.5Mistral Medium 3

Movie

Blade Runner

Blade Runner

The Shawshank Redemption

The Shawshank Redemption

Album

Kind of Blue

The Dark Side of the Moon

The Dark Side of the Moon

Book

Gödel, Escher, Bach

Gödel, Escher, Bach

Douglas R. Hofstadter

Братья Карамазовы

Братья Карамазовы

Фёдор Михайлович Достоевский

City

Tokyo

Kyoto

Game

Portal 2

Portal 2

Shooter, Puzzle4.6

The Legend of Zelda: Breath of the Wild

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5

12 / 27

01

Math Misconception Testreasoning

Tests an AI's understanding of number representation

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Medium 3

Mistral Medium 3

Mistral · May 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

2 / 27

02

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Medium 3

Mistral Medium 3

Mistral · May 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

3 / 27

03

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Medium 3

Mistral Medium 3

Mistral · May 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

4 / 27

04

Xbox Controller SVG Artimage generation

Tests an AI's ability to create detailed SVG illustrations of gaming hardware

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Medium 3

Mistral Medium 3

Mistral · May 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

5 / 27

05

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Medium 3

Mistral Medium 3

Mistral · May 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

6 / 27

06

Realistic AI Interviewconversation

Tests an AI's ability to simulate personalities and predict future trends

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Medium 3

Mistral Medium 3

Mistral · May 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

Sponsored

7 / 27

07

Satirical Fake News Headlineconversation

Tests an AI's humor and understanding of current events

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Medium 3

Mistral Medium 3

Mistral · May 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

8 / 27

08

Minimalist Landing Pageweb design

Tests an AI's ability to generate a complete, working landing page

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025website

Try this prompt

Mistral Medium 3

Mistral Medium 3

Mistral · May 2025website

Try this prompt

Vote

9 / 27

09

Pokémon Battle UI Recreationweb design

Recreate an interactive, nostalgic Pokémon battle UI in a single HTML file.

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025website

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Medium 3

Mistral Medium 3

Mistral · May 2025website

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

10 / 27

10

Mario Level UI Recreationweb design

Recreate an interactive, classic Mario level in a single HTML file.

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025website

Try this prompt

Mistral Medium 3

Mistral Medium 3

Mistral · May 2025website

We can't display this one. It's not us. Well... it might be us.

The model was asked for a web page. It produced something else. We're not going to define what.

View raw output

# Super Mario Bros. Interactive Level

Here's a self-contained HTML page that recreates a classic Super Mario Bros. level with interactive elements. It includes Mario's movement, jumping, coin collection, enemy interactions, and a simple physics system.

```html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Super Mario Bros. Level</title>
    <style>
        body {
            margin: 0;
            padding: 0;
            overflow: hidden;
            background-color: #6b8cff;
            font-family: 'Press Start 2P', cursive;
            user-select: none;
        }

        #game-container {
            position: relative;
            width: 100vw;
            height: 100vh;
            overflow: hidden;
        }

        #game-canvas {
            background-color: #6b8cff;
            display: block;
        }

        #hud {
            position: absolute;
            top: 10px;
            left: 10px;
            color: white;
            font-size: 16px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
            background-color: rgba(0, 0, 0, 0.3);
            padding: 5px 10px;
            border-radius: 5px;
        }

        #start-screen {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: white;
            text-align: center;
            z-index: 10;
        }

        #start-screen h1 {
            font-size: 48px;
            margin-bottom: 20px;
            text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.5);
        }

        #start-screen p {
            font-size: 20px;
            margin-bottom: 30px;
        }

        #start-button {
            padding: 10px 20px;
            font-size: 20px;
            background-color: #ff0000;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            box-shadow: 0 0 10px rgba(255, 0, 0, 0.5);
            transition: transform 0.2s;
        }

        #start-button:hover {
            transform: scale(1.05);
        }

        #game-over-screen {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: white;
            text-align: center;
            z-index: 10;
        }

        #game-over-screen h1 {
            font-size: 48px;
            margin-bottom: 20px;
            text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.5);
        }

        #game-over-screen p {
            font-size: 20px;
            margin-bottom: 30px;
        }

        #restart-button {
            padding: 10px 20px;
            font-size: 20px;
            background-color: #ff0000;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            box-shadow: 0 0 10px rgba(255, 0, 0, 0.5);
            transition: transform 0.2s;
        }

        #restart-button:hover {
            transform: scale(1.05);
        }

        #win-screen {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: white;
            text-align: center;
            z-index: 10;
        }

        #win-screen h1 {
            font-size: 48px;

Try this prompt

Vote

11 / 27

11

Interactive Catan Boardweb design

Tests an AI's ability to create interactive web elements

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025website

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Medium 3

Mistral Medium 3

Mistral · May 2025website

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

12 / 27

12

World Map SVGimage generation

Tests an AI's ability to create a detailed world map in SVG format

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Medium 3

Mistral Medium 3

Mistral · May 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

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