Updated May 28, 2025

Our Verdict

Claude Sonnet 4Winner

DeepSeek R1 0528Runner-up

Pick Claude Sonnet 4. In 39 blind votes, Claude Sonnet 4 wins 75% of the time. That's not luck.

Claude Sonnet 4 particularly excels in Web Design, Image Generation.

Clear winner

Writing DNA

Style Comparison

Similarity

75%

Claude Sonnet 4 uses 87.9x more emoji

Claude Sonnet 4

DeepSeek R1 0528

62%Vocabulary64%

111wSentence Length10w

0.40Hedging0.30

5.0Bold6.8

9.3Lists4.9

0.88Emoji0.00

2.16Headings0.40

0.33Transitions0.00

Based on 17 + 4 text responses

vs

Ask them anything yourself

Claude Sonnet 4

DeepSeek R1 0528

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

DeepSeek R1 0528 vs MiniMax M1New provider

DeepSeek R1 0528 vs GPT-5New provider

DeepSeek R1 0528 vs Claude Opus 4Cross-provider

Claude Sonnet 4vsDeepSeek R1 0528

33 fights queued

Why Claude Sonnet 4?

1.2x more context200K

Leads 1 of 1 benchmarks

Stronger on SWE-bench Verified72.7% vs 57.6%

Why DeepSeek R1 0528?

Dead even. This one's a coin flip.

Claude Sonnet 4DeepSeek R1 0528

Input price

$3.00/M

$0.000/M

Output price

$15.00/M

$0.000/M

Context

200K

164K

Released

May 2025

May 2025

Benchmarks1 common

SWE-bench Verified

72.7%+20.8%

57.6%

Favorites

Claude Sonnet 4DeepSeek R1 0528

Movie

2001: A Space Odyssey

2001: A Space Odyssey

—

Album

Kind of Blue

—

Book

Gödel, Escher, Bach

Gödel, Escher, Bach

Douglas R. Hofstadter

—

City

Istanbul

—

Game

Portal 2

Portal 2

Shooter, Puzzle4.6

—

12 / 33

01

Logic Puzzlereasoning

Tests an AI's ability to solve a simple but potentially confusing logic puzzle

Claude Sonnet 4

Claude Sonnet 4

Anthropic · May 2025text

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

Try this prompt

DeepSeek R1 0528

DeepSeek R1 0528

Deepseek · May 2025text

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

Try this prompt

Vote

2 / 33

02

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Claude Sonnet 4

Claude Sonnet 4

Anthropic · May 2025text

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

Try this prompt

DeepSeek R1 0528

DeepSeek R1 0528

Deepseek · May 2025text

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

Try this prompt

Vote

3 / 33

03

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Claude Sonnet 4

Claude Sonnet 4

Anthropic · May 2025svg

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

Try this prompt

DeepSeek R1 0528

DeepSeek R1 0528

Deepseek · May 2025svg

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

Try this prompt

Vote

4 / 33

04

Xbox Controller SVG Artimage generation

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

Claude Sonnet 4

Claude Sonnet 4

Anthropic · May 2025svg

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

Try this prompt

DeepSeek R1 0528

DeepSeek R1 0528

Deepseek · May 2025svg

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

Try this prompt

Vote

5 / 33

05

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

Claude Sonnet 4

Claude Sonnet 4

Anthropic · May 2025text

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

Try this prompt

DeepSeek R1 0528

DeepSeek R1 0528

Deepseek · May 2025text

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

Try this prompt

Vote

6 / 33

06

Pokémon Battle UI Recreationweb design

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

Claude Sonnet 4

Claude Sonnet 4

Anthropic · May 2025website

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

Try this prompt

DeepSeek R1 0528

DeepSeek R1 0528

Deepseek · May 2025website

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

Try this prompt

Vote

Sponsored

7 / 33

07

Three.js 3D Gameweb design

Create a 3D building and driving game in a single self-contained HTML file using Three.js. Tests an AI's ability to combine 3D graphics, game logic, and UI interactions on the web.

Claude Sonnet 4

Claude Sonnet 4

Anthropic · May 2025html

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

Try this prompt

DeepSeek R1 0528

DeepSeek R1 0528

Deepseek · May 2025html

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

Try this prompt

Vote

8 / 33

08

Mario Level UI Recreationweb design

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

Claude Sonnet 4

Claude Sonnet 4

Anthropic · May 2025website

Try this prompt

DeepSeek R1 0528

DeepSeek R1 0528

Deepseek · 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. HTML5 Game

I'll create an interactive Super Mario Bros.-inspired game using HTML5 Canvas and JavaScript. This will include Mario character control, platforms, enemies, coins, and Nintendo-style visuals - all in a single HTML file.

```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. HTML5 Edition</title>
    <style>
        body {
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background: linear-gradient(to bottom, #1a1a5a, #4a4a8f);
            font-family: 'Courier New', monospace;
            overflow: hidden;
            user-select: none;
        }
        
        #game-container {
            position: relative;
            width: 800px;
            height: 500px;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.7);
            border-radius: 8px;
            overflow: hidden;
        }
        
        #game-canvas {
            background: linear-gradient(to bottom, #6bb9f0, #1e88e5);
            width: 100%;
            height: 100%;
            cursor: pointer;
        }
        
        #ui-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            padding: 10px;
            box-sizing: border-box;
            color: white;
            font-size: 18px;
            display: flex;
            justify-content: space-between;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
        }
        
        #start-screen {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #e74c3c, #c0392b);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: white;
            z-index: 10;
        }
        
        #start-screen h1 {
            font-size: 48px;
            margin-bottom: 20px;
            text-shadow: 4px 4px 8px rgba(0, 0, 0, 0.5);
            letter-spacing: 2px;
            color: #f1c40f;
        }
        
        #start-screen p {
            font-size: 24px;
            margin: 10px;
            text-align: center;
            max-width: 80%;
        }
        
        #start-button {
            margin-top: 30px;
            padding: 12px 30px;
            font-size: 22px;
            background: #27ae60;
            border: none;
            border-radius: 50px;
            color: white;
            cursor: pointer;
            transition: all 0.2s;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
        }
        
        #start-button:hover {
            background: #2ecc71;
            transform: scale(1.05);
        }
        
        #controls {
            display: flex;
            gap: 20px;
            margin-top: 20px;
            background: rgba(0, 0, 0, 0.5);
            padding: 15px;
            border-radius: 10px;
        }
        
        .key {
            display: inline-block;
            width: 40px;
            height: 40px;
            background: #333;
            border-radius: 5px;
            text-align: center;
            line-height: 40px;
            font-weight: bold;
            box-shadow: inset -2px -2px 4px rgba(0,0,0,0.4);
            margin: 0 5px;
        }
        
        #game-over, #level-complete {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.85);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: white;
            z-index: 9;
            display: none;
        }
        
        #game-over h2, #level-complete h2 {
            font-size: 60px;
            margin: 0;
            color

Try this prompt

Vote

9 / 33

09

Linear App Cloneweb design

Tests an AI's ability to replicate an existing UI with Tailwind CSS

Claude Sonnet 4

Claude Sonnet 4

Anthropic · May 2025website

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

Try this prompt

DeepSeek R1 0528

DeepSeek R1 0528

Deepseek · May 2025website

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

Try this prompt

Vote

10 / 33

10

Interactive Catan Boardweb design

Tests an AI's ability to create interactive web elements

Claude Sonnet 4

Claude Sonnet 4

Anthropic · May 2025website

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

Try this prompt

DeepSeek R1 0528

DeepSeek R1 0528

Deepseek · May 2025website

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

Try this prompt

Vote

11 / 33

11

World Map SVGimage generation

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

Claude Sonnet 4

Claude Sonnet 4

Anthropic · May 2025svg

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

Try this prompt

DeepSeek R1 0528

DeepSeek R1 0528

Deepseek · May 2025svg

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

Try this prompt

Vote

12 / 33

12

Random Tailwind Webappweb design

Generate a single-page, self-contained HTML webapp using Tailwind CSS for a randomly chosen category/industry/niche.

Claude Sonnet 4

Claude Sonnet 4

Anthropic · May 2025website

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

Try this prompt

DeepSeek R1 0528

DeepSeek R1 0528

Deepseek · May 2025website

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

Try this prompt

Vote

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