Updated May 22, 2025

Our Verdict

Claude Opus 4Winner

DeepSeek R1Runner-up

Pick Claude Opus 4. In 16 blind votes, Claude Opus 4 wins 58% of the time. That's not luck.

Claude Opus 4 particularly excels in Web Design. DeepSeek R1 is 34x cheaper per token — worth considering if cost matters.

Clear winner

Writing DNA

Style Comparison

Similarity

84%

Claude Opus 4 uses 4.2x more sentence length

Claude Opus 4

DeepSeek R1

64%Vocabulary62%

62wSentence Length15w

0.52Hedging0.52

4.4Bold8.0

9.1Lists5.7

0.11Emoji0.04

1.87Headings0.62

0.27Transitions0.28

Based on 16 + 22 text responses

vs

Ask them anything yourself

Claude Opus 4

DeepSeek R1

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 vs MiniMax M1New provider

DeepSeek R1 vs GPT-5New provider

DeepSeek R1 vs Claude Sonnet 4Cross-provider

Claude Opus 4vsDeepSeek R1

34 fights queued

Why Claude Opus 4?

1.6x more context200K

Leads 1 of 1 benchmarks

Stronger on SWE-bench Verified72.5% vs 49.2%

4 months newerMay 2025

Why DeepSeek R1?

33.2x cheaper overall$0.55/M in · $2.19/M out

Claude Opus 4DeepSeek R1

Input price

$15.00/M

$0.55/M

Output price

$75.00/M

$2.19/M

Context

200K

128K

Released

May 2025

Feb 2025

Benchmarks1 common

SWE-bench Verified

72.5%+32.1%

49.2%

Favorites

Claude Opus 4DeepSeek R1

Movie

Arrival

Arrival

The Godfather

The Godfather

Album

The Dark Side of the Moon

The Dark Side of the Moon

The Dark Side of the Moon

The Dark Side of the Moon

Book

Cien años de soledad

Cien años de soledad

Gabriel García Márquez

Pride and Prejudice

Pride and Prejudice

City

Istanbul

Kyoto

Game

Portal 2

Portal 2

Shooter, Puzzle4.6

The Legend of Zelda: Ocarina of Time

The Legend of Zelda: Ocarina of Time

Adventure, Action4.4

12 / 34

01

Logic Puzzlereasoning

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

Claude Opus 4

Claude Opus 4

Anthropic · May 2025text

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

Try this prompt

DeepSeek R1

DeepSeek R1

Deepseek · Feb 2025text

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

Try this prompt

Vote

2 / 34

02

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Claude Opus 4

Claude Opus 4

Anthropic · May 2025text

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

Try this prompt

DeepSeek R1

DeepSeek R1

Deepseek · Feb 2025text

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

Try this prompt

Vote

3 / 34

03

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Claude Opus 4

Claude Opus 4

Anthropic · May 2025svg

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

Try this prompt

DeepSeek R1

DeepSeek R1

Deepseek · Feb 2025svg

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

Try this prompt

Vote

4 / 34

04

Xbox Controller SVG Artimage generation

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

Claude Opus 4

Claude Opus 4

Anthropic · May 2025svg

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

Try this prompt

DeepSeek R1

DeepSeek R1

Deepseek · Feb 2025svg

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

Try this prompt

Vote

5 / 34

05

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

Claude Opus 4

Claude Opus 4

Anthropic · May 2025text

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

Try this prompt

DeepSeek R1

DeepSeek R1

Deepseek · Feb 2025text

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

Try this prompt

Vote

6 / 34

06

Pokémon Battle UI Recreationweb design

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

Claude Opus 4

Claude Opus 4

Anthropic · May 2025website

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

Try this prompt

DeepSeek R1

DeepSeek R1

Deepseek · Feb 2025website

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

Try this prompt

Vote

Sponsored

7 / 34

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 Opus 4

Claude Opus 4

Anthropic · May 2025html

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

Try this prompt

DeepSeek R1

DeepSeek R1

Deepseek · Feb 2025html

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

Try this prompt

Vote

8 / 34

08

Mario Level UI Recreationweb design

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

Claude Opus 4

Claude Opus 4

Anthropic · May 2025website

Try this prompt

DeepSeek R1

DeepSeek R1

Deepseek · Feb 2025website

Try this prompt

Vote

9 / 34

09

Linear App Cloneweb design

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

Claude Opus 4

Claude Opus 4

Anthropic · May 2025website

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

Try this prompt

DeepSeek R1

DeepSeek R1

Deepseek · Feb 2025website

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

Try this prompt

Vote

10 / 34

10

Interactive Catan Boardweb design

Tests an AI's ability to create interactive web elements

Claude Opus 4

Claude Opus 4

Anthropic · May 2025website

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

Try this prompt

DeepSeek R1

DeepSeek R1

Deepseek · Feb 2025website

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

Try this prompt

Vote

11 / 34

11

World Map SVGimage generation

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

Claude Opus 4

Claude Opus 4

Anthropic · May 2025svg

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

Try this prompt

DeepSeek R1

DeepSeek R1

Deepseek · Feb 2025svg

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

Try this prompt

Vote

12 / 34

12

Random Tailwind Webappweb design

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

Claude Opus 4

Claude Opus 4

Anthropic · May 2025website

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

Try this prompt

DeepSeek R1

DeepSeek R1

Deepseek · Feb 2025website

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

Try this prompt

Vote

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