Updated Mar 12, 2026

Our Verdict

Claude Opus 4.5

Grok 4.20 Beta

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

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Claude Opus 4.5vsGrok 4.20 Beta

47 fights queued

Why Claude Opus 4.5?

Dead even. This one's a coin flip.

Why Grok 4.20 Beta?

4 months newerMar 2026

Favorites

Claude Opus 4.5Grok 4.20 Beta

Movie

Blade Runner

Blade Runner

The Matrix

The Matrix

Album

Kind of Blue

The Dark Side of the Moon

The Dark Side of the Moon

Book

Gödel, Escher, Bach

Gödel, Escher, Bach

Douglas R. Hofstadter

The Hitch Hiker's Guide to the Galaxy

The Hitch Hiker's Guide to the Galaxy

City

Tokyo

Tokyo

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 / 47

01

Estimate Complexityreasoning

Tests an AI's ability to make educated estimates based on technical knowledge

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025text

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

Try this prompt

Grok 4.20 Beta

Grok 4.20 Beta

Xai · Mar 2026text

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

Try this prompt

Vote

2 / 47

02

AI Board Game Logicreasoning

Tests an AI's ability to understand game rules and strategy

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025svg

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

Try this prompt

Grok 4.20 Beta

Grok 4.20 Beta

Xai · Mar 2026svg

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

Try this prompt

Vote

3 / 47

03

Logic Puzzlereasoning

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

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025text

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

Try this prompt

Grok 4.20 Beta

Grok 4.20 Beta

Xai · Mar 2026text

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

Try this prompt

Vote

4 / 47

04

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025text

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

Try this prompt

Grok 4.20 Beta

Grok 4.20 Beta

Xai · Mar 2026text

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

Try this prompt

Vote

5 / 47

05

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025svg

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

Try this prompt

Grok 4.20 Beta

Grok 4.20 Beta

Xai · Mar 2026svg

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

Try this prompt

Vote

6 / 47

06

Xbox Controller SVG Artimage generation

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

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025svg

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

Try this prompt

Grok 4.20 Beta

Grok 4.20 Beta

Xai · Mar 2026svg

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

Try this prompt

Vote

7 / 47

07

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025text

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

Try this prompt

Grok 4.20 Beta

Grok 4.20 Beta

Xai · Mar 2026text

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

Try this prompt

Vote

8 / 47

08

Realistic AI Interviewconversation

Tests an AI's ability to simulate personalities and predict future trends

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025text

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

Try this prompt

Grok 4.20 Beta

Grok 4.20 Beta

Xai · Mar 2026text

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

Try this prompt

Vote

Which one handles your task better?

Paste your actual prompt. Same models, your work. 30 seconds.

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9 / 47

09

Satirical Fake News Headlineconversation

Tests an AI's humor and understanding of current events

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025text

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

Try this prompt

Grok 4.20 Beta

Grok 4.20 Beta

Xai · Mar 2026text

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

Try this prompt

Vote

10 / 47

10

Character Voice Testconversation

Tests an AI's ability to write in distinct character voices

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025text

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

Try this prompt

Grok 4.20 Beta

Grok 4.20 Beta

Xai · Mar 2026text

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

Try this prompt

Vote

11 / 47

11

Minimalist Landing Pageweb design

Tests an AI's ability to generate a complete, working landing page

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025website

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Grok 4.20 Beta

Grok 4.20 Beta

Xai · Mar 2026website

Try this prompt

Vote

12 / 47

12

Pokémon Battle UI Recreationweb design

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

Claude Opus 4.5

Claude Opus 4.5

Anthropic · Nov 2025website

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

Try this prompt

Grok 4.20 Beta

Grok 4.20 Beta

Xai · Mar 2026website

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

Try this prompt

Vote

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