Updated May 7, 2025

Our Verdict

Mistral Medium 3

OpenAI o3

Genuinely even. Both are strong choices.

Mistral Medium 3 is 20x cheaper per token — worth considering if cost matters.

Too close to call

Writing DNA

Style Comparison

Similarity

99%

Mistral Medium 3 uses 6.0x more emoji

Mistral Medium 3

OpenAI o3

57%Vocabulary68%

17wSentence Length14w

0.73Hedging0.26

8.6Bold0.7

6.5Lists3.0

0.06Emoji0.00

1.18Headings0.38

0.15Transitions0.12

Based on 15 + 16 text responses

vs

Ask them anything yourself

Mistral Medium 3

OpenAI o3

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

Keep going

Mistral Medium 3 vs Gemini 2.5 Pro Preview 06-05New provider

Mistral Medium 3 vs MiniMax M2.5New provider

Mistral Medium 3 vs Aurora AlphaNew provider

Mistral Medium 3vsOpenAI o3

27 fights queued

Why Mistral Medium 3?

20.6x cheaper overall$0.40/M in · $2.00/M out

Why OpenAI o3?

Dead even. This one's a coin flip.

Mistral Medium 3OpenAI o3

Input price

$0.40/M

$10.00/M

Output price

$2.00/M

$40.00/M

Context

131K

—

Released

May 2025

Apr 2025

Favorites

Mistral Medium 3OpenAI o3

Movie

The Shawshank Redemption

The Shawshank Redemption

Blade Runner

Blade Runner

Album

The Dark Side of the Moon

The Dark Side of the Moon

—

Book

Братья Карамазовы

Братья Карамазовы

Фёдор Михайлович Достоевский

—

City

Kyoto

Kyoto

Game

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

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

OpenAI o3

OpenAI o3

Openai · Apr 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

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

OpenAI o3

OpenAI o3

Openai · Apr 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

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

OpenAI o3

OpenAI o3

Openai · Apr 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

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

OpenAI o3

OpenAI o3

Openai · Apr 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

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

OpenAI o3

OpenAI o3

Openai · Apr 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

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

OpenAI o3

OpenAI o3

Openai · Apr 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

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

OpenAI o3

OpenAI o3

Openai · Apr 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

Mistral Medium 3

Mistral Medium 3

Mistral · May 2025website

Try this prompt

OpenAI o3

OpenAI o3

Openai · Apr 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.

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

OpenAI o3

OpenAI o3

Openai · Apr 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.

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

OpenAI o3

OpenAI o3

Openai · Apr 2025website

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

Try this prompt

Vote

11 / 27

11

Interactive Catan Boardweb design

Tests an AI's ability to create interactive web elements

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

OpenAI o3

OpenAI o3

Openai · Apr 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

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

OpenAI o3

OpenAI o3

Openai · Apr 2025svg

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

Try this prompt

Vote

This matchup has more rounds

15+ more head-to-head results. Free. Not a trick.

Free account. No card required. By continuing, you agree to Rival's Terms and Privacy Policy