Updated Jul 9, 2025

Our Verdict

Claude Opus 4Winner

xAI: Grok 4Runner-up

Pick Claude Opus 4. In 61 blind votes, Claude Opus 4 wins 80% of the time. That's not luck.

Claude Opus 4 particularly excels in Web Design, Image Generation, Analysis. xAI: Grok 4 is 5.0x cheaper per token — worth considering if cost matters.

Clear winner

Writing DNA

Style Comparison

Similarity

97%

Claude Opus 4 uses 6.2x more transitions

xAI: Grok 4

Claude Opus 4

53%Vocabulary64%

18wSentence Length62w

0.67Hedging0.52

2.7Bold4.4

2.7Lists9.1

0.07Emoji0.11

0.86Headings1.87

0.04Transitions0.27

Based on 21 + 16 text responses

vs

Ask them anything yourself

xAI: Grok 4

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

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

FAQ

Common questions

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xAI: Grok 4 vs MiniMax M1New provider

xAI: Grok 4 vs GPT-5New provider

xAI: Grok 4 vs Claude Sonnet 4Cross-provider

xAI: Grok 4vsClaude Opus 4

28 fights queued

Why xAI: Grok 4?

5x cheaper overall$3.00/M in · $15.00/M out

1.3x more context256K

2 months newerJul 2025

Why Claude Opus 4?

Dead even. This one's a coin flip.

xAI: Grok 4Claude Opus 4

Input price

$3.00/M

$15.00/M

Output price

$15.00/M

$75.00/M

Context

256K

200K

Released

Jul 2025

May 2025

Favorites

xAI: Grok 4Claude Opus 4

Movie

The Matrix

The Matrix

Arrival

Arrival

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

The Hitch Hiker's Guide to the Galaxy

The Hitch Hiker's Guide to the Galaxy

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 / 28

01

Logic Puzzlereasoning

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

xAI: Grok 4

xAI: Grok 4

Xai · Jul 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.

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2 / 28

02

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

xAI: Grok 4

xAI: Grok 4

Xai · Jul 2025text

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

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025text

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

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3 / 28

03

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

xAI: Grok 4

xAI: Grok 4

Xai · Jul 2025svg

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

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025svg

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

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4 / 28

04

Xbox Controller SVG Artimage generation

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

xAI: Grok 4

xAI: Grok 4

Xai · Jul 2025svg

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

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025svg

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

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5 / 28

05

Pokémon Battle UI Recreationweb design

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

xAI: Grok 4

xAI: Grok 4

Xai · Jul 2025website

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

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025website

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

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6 / 28

06

Mario Level UI Recreationweb design

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

xAI: Grok 4

xAI: Grok 4

Xai · Jul 2025website

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025website

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Sponsored

7 / 28

07

Linear App Cloneweb design

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

xAI: Grok 4

xAI: Grok 4

Xai · Jul 2025website

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

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Claude Opus 4

Claude Opus 4

Anthropic · May 2025website

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

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8 / 28

08

Random Tailwind Webappweb design

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

xAI: Grok 4

xAI: Grok 4

Xai · Jul 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.

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9 / 28

09

Surprise Animal SVGimage generation

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

xAI: Grok 4

xAI: Grok 4

Xai · Jul 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.

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10 / 28

10

Simple 7-Ingredient Recipeconversation

Generate a unique and simple recipe with common ingredients.

xAI: Grok 4

xAI: Grok 4

Xai · Jul 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

Midnight Comfort Pasta

Ingredients:

12 oz spaghetti or any pasta
3 tablespoons olive oil
4 cloves garlic, minced
1/2 teaspoon red pepper flakes
1 can (14.5 oz) diced tomatoes
1/2 cup grated Parmesan cheese
Salt to taste

Instructions:

Cook the pasta according to package directions in salted water until al d ente. Reserve 1 cup of pasta water before draining.
Heat olive oil in a large skillet over medium heat. Add minced garlic and red pepper flakes. Sauté fo r 1-2 minutes until fragrant but not brown.
Add the tomatoes with their juice to the skillet. Simmer for 5-7 minutes, breaking up larger pieces w ith a spoon. Season with salt.
Toss the pasta with the tomato mixture. Add pasta water gradually to achi eve desired consistency.
Remove from heat and stir in half the Parmesan cheese. Serve immediately topped with remaining cheese .

Time:

Prep time: 5 minutes
Cook time: 15 minutes
Total time: 20 minutes

Serves: 4

Why "Midnight Comfort"? Because this is the pasta you make when it's late, you' re hungry, and these ingredi ents are always waiting in your pantry!

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11 / 28

11

Beginner's Longevity Planreasoning

Create a starter plan for improving long-term health.

xAI: Grok 4

xAI: Grok 4

Xai · Jul 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

Your 1-Month Health & Longevity Kickstart Plan

Week-by-Week Overview

Week 1: Foundation Building

Focus on establishing basic habits without overwhelming yourself.

Week 2: Consistency

Solidify Week 1 habits and add small challenges.

Week 3: Expansion

Introduce variety and slightly increase intensity.

Week 4: Integration

Make these habits feel like a natural part of your lifestyle.

🥗 NUTRITION: Simple, Sustainable Changes

Week 1-2: The Basics

Add, don't subtract: Include 1 serving of vegetables with lunch and dinner
Hydration first: Drink a full glass of water upon waking and before each meal
Protein priority: Ensure each meal contains a palm-sized portion of protein

Week 3-4: Level Up

Colorful plates: Aim for 3 different colored vegetables daily
Smart swaps: Replace one processed snack with whole foods (nuts, fruit, yogurt)
Meal prep Sunday: Prepare 3 healthy lunches for the week

Daily Target: 5 servings of fruits/vegetables, 8 glasses of water

🏃 MOVEMENT: Start Where You Are

Week 1-2: Build the Habit

Morning activation: 5-minute stretch routine upon waking
Daily walk: 10-minute walk after lunch or dinner
Strength basics: 2 days/week, 10 minutes of bodyweight exercises (push-ups, squats, planks)

Week 3-4: Progress Gradually

Extended walks: Increase to 20 minutes, add hills or stairs
Strength progression: 3 days/week, 15 minutes, add more reps
Fun factor: Try one new activity (dance video, bike ride, swimming)

Weekly Target: 150 minutes of movement total

😴 SLEEP: Your Recovery Superpower

Week 1-2: Sleep Hygiene Basics

Consistent schedule: Same bedtime and wake time (even weekends)
Wind-down routine: 30 minutes before bed - no screens, dim lights
Bedroom setup: Cool (65-68°F), dark, and quiet

Week 3-4: Optimize Quality

Morning sunlight: 10 minutes of natural light within 30 minutes of waking
Caffeine cutoff: No caffeine after 2 PM
Sleep tracking: Use a simple app or journal to monitor patterns

Daily Target: 7-8 hours of sleep

📋 Your Daily Checklist

Print this and check off each day:

Drank water first thing in morning
Ate vegetables with 2 meals
Moved for at least 20 minutes
Started wind-down routine by designated time
Avoided screens 30 minutes before bed

💡 Success Tips

Start small: Better to do 5 minutes consistently than 30 minutes sporadically
Track visually: Use a calendar to mark successful days
Prepare for obstacles: Have backup plans (indoor exercises, pre-cut veggies)
Celebrate wins: Acknowledge every small victory
Find accountability: Share your plan with a friend or family member

🎯 End-of-Month Goals

By Day 30, you should:

Feel more energetic throughout the day
Have established a consistent sleep schedule
Complete 20+ minutes of daily movement without struggle
Naturally reach for healthier food options
Have a sustainable routine you actually enjoy

Remember: This month is about building momentum, not perfection. Focus on progress over perfection, and thes e small changes will compound into significant long-term health improvements.

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12 / 28

12

Minimalist Logo SVGimage generation

Design a clean SVG logo for a fictional brand.

xAI: Grok 4

xAI: Grok 4

Xai · Jul 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.

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Vote

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