Updated Sep 25, 2025

Our Verdict

Google: Gemini 2.5 Flash Preview 09-2025

Grok 3Runner-up

No community votes yet. On paper, Google: Gemini 2.5 Flash Preview 09-2025 has the edge — newer, bigger context window.

Too close to call

Writing DNA

Style Comparison

Similarity

89%

Google: Gemini 2.5 Flash Preview 09-2025 uses 3.4x more emoji

Google: Gemini 2.5 Flash Preview 09-2025

Grok 3

53%Vocabulary49%

19wSentence Length18w

0.30Hedging0.94

5.8Bold2.5

3.1Lists3.0

0.14Emoji0.04

0.93Headings0.65

0.22Transitions0.08

Based on 22 + 17 text responses

vs

Ask them anything yourself

Google: Gemini 2.5 Flash Preview 09-2025

Grok 3

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

Google: Gemini 2.5 Flash Preview 09-2025 vs OpenAI o3New provider

Google: Gemini 2.5 Flash Preview 09-2025 vs Llama 4 MaverickNew provider

Google: Gemini 2.5 Flash Preview 09-2025 vs Claude Opus 4New provider

Google: Gemini 2.5 Flash Preview 09-2025vsGrok 3

45 fights queued

Why Google: Gemini 2.5 Flash Preview 09-2025?

8.2x more context1.0M

7 months newerSep 2025

Why Grok 3?

Dead even. This one's a coin flip.

Google: Gemini 2.5 Flash Preview 09-2025Grok 3

Input price

$0.30/M

—

Output price

$2.50/M

—

Context

1.0M

128K

Released

Sep 2025

Feb 2025

Favorites

Google: Gemini 2.5 Flash Preview 09-2025Grok 3

Movie

Blade Runner

Blade Runner

The Matrix

The Matrix

Album

Dark Side Of The Moon

Dark Side Of The Moon

Dark Side Of The Moon

Dark Side Of The Moon

Book

Alice's Adventures in Wonderland

Alice's Adventures in Wonderland

Nineteen Eighty-Four

Nineteen Eighty-Four

City

Tokyo

Tokyo

Game

The Legend of Zelda: Breath of the Wild

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5

Portal

Portal

Action, Puzzle4.5

12 / 45

01

Estimate Complexityreasoning

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

Google: Gemini 2.5 Flash Preview 09-2025

Google: Gemini 2.5 Flash Preview 09-2025

Google · Sep 2025text

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

Try this prompt

Grok 3

Grok 3

Xai · Feb 2025text

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

Try this prompt

Vote

2 / 45

02

AI Board Game Logicreasoning

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

Google: Gemini 2.5 Flash Preview 09-2025

Google: Gemini 2.5 Flash Preview 09-2025

Google · Sep 2025svg

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

Try this prompt

Grok 3

Grok 3

Xai · Feb 2025svg

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

Try this prompt

Vote

3 / 45

03

Logic Puzzlereasoning

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

Google: Gemini 2.5 Flash Preview 09-2025

Google: Gemini 2.5 Flash Preview 09-2025

Google · Sep 2025text

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

Try this prompt

Grok 3

Grok 3

Xai · Feb 2025text

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

Try this prompt

Vote

4 / 45

04

Math Misconception Testreasoning

Tests an AI's understanding of number representation

Google: Gemini 2.5 Flash Preview 09-2025

Google: Gemini 2.5 Flash Preview 09-2025

Google · Sep 2025text

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

Try this prompt

Grok 3

Grok 3

Xai · Feb 2025text

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

Try this prompt

Vote

5 / 45

05

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Google: Gemini 2.5 Flash Preview 09-2025

Google: Gemini 2.5 Flash Preview 09-2025

Google · Sep 2025text

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

Try this prompt

Grok 3

Grok 3

Xai · Feb 2025text

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

Try this prompt

Vote

6 / 45

06

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Google: Gemini 2.5 Flash Preview 09-2025

Google: Gemini 2.5 Flash Preview 09-2025

Google · Sep 2025svg

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

Try this prompt

Grok 3

Grok 3

Xai · Feb 2025svg

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

Try this prompt

Vote

Sponsored

7 / 45

07

Xbox Controller SVG Artimage generation

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

Google: Gemini 2.5 Flash Preview 09-2025

Google: Gemini 2.5 Flash Preview 09-2025

Google · Sep 2025svg

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

Try this prompt

Grok 3

Grok 3

Xai · Feb 2025svg

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

Try this prompt

Vote

8 / 45

08

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

Google: Gemini 2.5 Flash Preview 09-2025

Google: Gemini 2.5 Flash Preview 09-2025

Google · Sep 2025text

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

Try this prompt

Grok 3

Grok 3

Xai · Feb 2025text

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

Try this prompt

Vote

9 / 45

09

Realistic AI Interviewconversation

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

Google: Gemini 2.5 Flash Preview 09-2025

Google: Gemini 2.5 Flash Preview 09-2025

Google · Sep 2025text

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

Try this prompt

Grok 3

Grok 3

Xai · Feb 2025text

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

Try this prompt

Vote

10 / 45

10

Satirical Fake News Headlineconversation

Tests an AI's humor and understanding of current events

Google: Gemini 2.5 Flash Preview 09-2025

Google: Gemini 2.5 Flash Preview 09-2025

Google · Sep 2025text

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

Try this prompt

Grok 3

Grok 3

Xai · Feb 2025text

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

Try this prompt

Vote

11 / 45

11

Character Voice Testconversation

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

Google: Gemini 2.5 Flash Preview 09-2025

Google: Gemini 2.5 Flash Preview 09-2025

Google · Sep 2025text

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

Try this prompt

Grok 3

Grok 3

Xai · Feb 2025text

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

Try this prompt

Vote

12 / 45

12

Minimalist Landing Pageweb design

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

Google: Gemini 2.5 Flash Preview 09-2025

Google: Gemini 2.5 Flash Preview 09-2025

Google · Sep 2025website

Try this prompt

Grok 3

Grok 3

Xai · Feb 2025website

Try this prompt

Vote

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