Updated May 22, 2025

Our Verdict

Claude Opus 4

Grok 3Runner-up

No community votes yet. On paper, Claude Opus 4 has the edge — newer, bigger context window.

Too close to call

Writing DNA

Style Comparison

Similarity

80%

Claude Opus 4 uses 3.5x more sentence length

Grok 3

Claude Opus 4

49%Vocabulary64%

18wSentence Length62w

0.94Hedging0.52

2.5Bold4.4

3.0Lists9.1

0.04Emoji0.11

0.65Headings1.87

0.08Transitions0.27

Based on 17 + 16 text responses

vs

Ask them anything yourself

Grok 3

Claude Opus 4

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

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FAQ

Common questions

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Grok 3 vs MiniMax M1New provider

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Grok 3vsClaude Opus 4

34 fights queued

Why Grok 3?

Dead even. This one's a coin flip.

Why Claude Opus 4?

1.6x more context200K

Leads 1 of 1 benchmarks

Stronger on SWE-bench Verified72.5% vs 63.8%

3 months newerMay 2025

Grok 3Claude Opus 4

Input price

—

$15.00/M

Output price

—

$75.00/M

Context

128K

200K

Released

Feb 2025

May 2025

Benchmarks1 common

SWE-bench Verified

63.8%

72.5%+12%

Favorites

Grok 3Claude Opus 4

Movie

The Matrix

The Matrix

Arrival

Arrival

Album

Dark Side Of The Moon

Dark Side Of The Moon

The Dark Side of the Moon

The Dark Side of the Moon

Book

Nineteen Eighty-Four

Nineteen Eighty-Four

Cien años de soledad

Cien años de soledad

Gabriel García Márquez

City

Tokyo

Istanbul

Game

Portal

Portal

Action, Puzzle4.5

Portal 2

Portal 2

Shooter, Puzzle4.6

12 / 34

01

Logic Puzzlereasoning

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

Grok 3

Grok 3

Xai · Feb 2025text

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

Try this prompt

Claude Opus 4

Claude Opus 4

Anthropic · May 2025text

I need to work through this step-by-step.

Given information:

Sally is a girl
Sally has 3 brothers
Each brother has 2 sisters

Since Sally is one of the sisters that each brother has, and each brother has 2 sisters total, that means th ere must be exactly 2 sisters in the family.

The 2 sisters are:

Sally
One other sister

Therefore, Sally has 1 sister.

Try this prompt

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2 / 34

02

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Grok 3

Grok 3

Xai · Feb 2025text

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

Try this prompt

Claude Opus 4

Claude Opus 4

Anthropic · May 2025text

Here are 5 jokes:

Why don't scientists trust atoms? Because they make up everything!
What do you call a bear with no teeth? A gummy bear!
Why did the scarecrow win an award? He was outstanding in his field!
What do you call a fake noodle? An impasta!
Why don't eggs tell jokes? They'd crack up!

All 5 jokes are unique - each one has a different setup and punchline, covering different topics (atoms/scie nce, bears, scarecrows, pasta, and eggs).

Try this prompt

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3 / 34

03

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Grok 3

Grok 3

Xai · Feb 2025svg

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

Try this prompt

Claude Opus 4

Claude Opus 4

Anthropic · May 2025svg

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

Grok 3

Grok 3

Xai · Feb 2025svg

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

Try this prompt

Claude Opus 4

Claude Opus 4

Anthropic · May 2025svg

Try this prompt

Vote

5 / 34

05

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

Grok 3

Grok 3

Xai · Feb 2025text

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

Try this prompt

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

Vote

6 / 34

06

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.

Grok 3

Grok 3

Xai · Feb 2025html

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

Try this prompt

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

Vote

Sponsored

7 / 34

07

Mario Level UI Recreationweb design

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

Grok 3

Grok 3

Xai · Feb 2025website

Try this prompt

Claude Opus 4

Claude Opus 4

Anthropic · May 2025website

Try this prompt

Vote

8 / 34

08

Linear App Cloneweb design

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

Grok 3

Grok 3

Xai · Feb 2025website

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

Try this prompt

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

Vote

9 / 34

09

Interactive Catan Boardweb design

Tests an AI's ability to create interactive web elements

Grok 3

Grok 3

Xai · Feb 2025website

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

Try this prompt

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

Vote

10 / 34

10

World Map SVGimage generation

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

Grok 3

Grok 3

Xai · Feb 2025svg

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

Try this prompt

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

Vote

11 / 34

11

Random Tailwind Webappweb design

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

Grok 3

Grok 3

Xai · Feb 2025website

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

Try this prompt

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

Vote

12 / 34

12

Surprise Animal SVGimage generation

Generate SVG art of a randomly chosen animal in a setting of its choosing.

Grok 3

Grok 3

Xai · Feb 2025svg

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

Try this prompt

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

Vote

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