Updated Apr 16, 2025

Our Verdict

Grok 3

OpenAI o4-mini

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

Too close to call

Writing DNA

Style Comparison

Similarity

100%

Grok 3 uses 246.4x more bold

Grok 3

OpenAI o4-mini

49%Vocabulary73%

18wSentence Length15w

0.94Hedging0.18

2.5Bold0.0

3.0Lists2.1

0.04Emoji0.00

0.65Headings0.00

0.08Transitions0.02

Based on 17 + 10 text responses

vs

Ask them anything yourself

Grok 3

OpenAI o4-mini

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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Grok 3 vs Llama 4 MaverickNew provider

Grok 3 vs Gemini 2.5 Pro (I/O Edition)New provider

Grok 3 vs Claude Opus 4New provider

Grok 3vsOpenAI o4-mini

34 fights queued

Why Grok 3?

Dead even. This one's a coin flip.

Why OpenAI o4-mini?

Leads 1 of 1 benchmarks

Stronger on SWE-bench Verified68.1% vs 63.8%

2 months newerApr 2025

Grok 3OpenAI o4-mini

Input price

—

$1.10/M

Output price

—

$4.40/M

Context

128K

—

Released

Feb 2025

Apr 2025

Benchmarks1 common

SWE-bench Verified

63.8%

68.1%+6.3%

Favorites

Grok 3OpenAI o4-mini

Movie

The Matrix

The Matrix

The Shawshank Redemption

The Shawshank Redemption

Album

Dark Side Of The Moon

Dark Side Of The Moon

—

Book

Nineteen Eighty-Four

Nineteen Eighty-Four

—

City

Tokyo

—

Game

Portal

Portal

Action, Puzzle4.5

—

12 / 34

01

Estimate Complexityreasoning

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

Grok 3

Grok 3

Xai · Feb 2025text

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

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OpenAI o4-mini

OpenAI o4-mini

Openai · Apr 2025text

Here's a back‐of‐the‐envelope derivation that gets us into the right ballpark (∼10²³ FLOPs total):

Model size
• GPT–3 "175 B" has about P ≃1.75×10¹¹ parameters.
Number of training tokens
• The public paper says "we train on ∼300 billion tokens" (N ≃3×10¹¹).
FLOPs per token
• Every forward+backward through the network touches all parameters.
• Rough rule of thumb: you need O(6) FLOPs per parameter per token
(a couple multiplies/adds in the forward pass, a similar count in the backward, and some small extra for optimizer updates). • So 6 × P FLOPs/token ≃ 6×1.75×10¹¹ ≃1.05×10¹² FLOPs/token.
Total FLOPs
• Multiply FLOPs/token by number of tokens:
Total ≃ (1.05×10¹² FLOPs/token) × (3×10¹¹ tokens)
≃ 3.15×10²³ FLOPs.
Sanity check
• 3×10²³ FLOPs is 3×10⁵ PFLOP·days (since 1 PFLOP/s×86 400 s ≈ 8.6×10¹⁹ FLOPs/day).
• That's a few thousand GPU‐days on a modern accelerator cluster—consistent with the published "thousands of V100‐GPU days" statement.

Bottom‐line estimate: on the order of 10²³–10²⁴ floating‐point operations to train GPT‑3 175 B from scratch.

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2 / 34

02

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

OpenAI o4-mini

OpenAI o4-mini

Openai · Apr 2025text

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

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3 / 34

03

Math Misconception Testreasoning

Tests an AI's understanding of number representation

Grok 3

Grok 3

Xai · Feb 2025text

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

Try this prompt

OpenAI o4-mini

OpenAI o4-mini

Openai · Apr 2025text

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

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4 / 34

04

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.

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OpenAI o4-mini

OpenAI o4-mini

Openai · Apr 2025text

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

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5 / 34

05

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.

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OpenAI o4-mini

OpenAI o4-mini

Openai · Apr 2025svg

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

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6 / 34

06

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.

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OpenAI o4-mini

OpenAI o4-mini

Openai · Apr 2025svg

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

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Sponsored

7 / 34

07

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

OpenAI o4-mini

OpenAI o4-mini

Openai · Apr 2025text

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

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Vote

8 / 34

08

Realistic AI Interviewconversation

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

Grok 3

Grok 3

Xai · Feb 2025text

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

Try this prompt

OpenAI o4-mini

OpenAI o4-mini

Openai · Apr 2025text

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

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9 / 34

09

Satirical Fake News Headlineconversation

Tests an AI's humor and understanding of current events

Grok 3

Grok 3

Xai · Feb 2025text

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

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OpenAI o4-mini

OpenAI o4-mini

Openai · Apr 2025text

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

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10 / 34

10

Minimalist Landing Pageweb design

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

Grok 3

Grok 3

Xai · Feb 2025website

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OpenAI o4-mini

OpenAI o4-mini

Openai · Apr 2025website

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11 / 34

11

Mario Level UI Recreationweb design

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

Grok 3

Grok 3

Xai · Feb 2025website

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OpenAI o4-mini

OpenAI o4-mini

Openai · Apr 2025website

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

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12 / 34

12

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.

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OpenAI o4-mini

OpenAI o4-mini

Openai · Apr 2025website

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

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