Updated Feb 19, 2026

Our Verdict

Gemini 3.1 Pro Preview

Claude Sonnet 4.5Runner-up

No community votes yet. On paper, Gemini 3.1 Pro Preview has the edge — bigger model tier, newer, bigger context window.

Slight edge

Writing DNA

Style Comparison

Similarity

97%

Claude Sonnet 4.5 uses 45.2x more emoji

Claude Sonnet 4.5

Gemini 3.1 Pro Preview

64%Vocabulary54%

94wSentence Length18w

0.48Hedging0.29

4.9Bold4.9

8.0Lists3.3

0.45Emoji0.00

1.91Headings0.72

0.07Transitions0.14

Based on 20 + 23 text responses

vs

Ask them anything yourself

Claude Sonnet 4.5

Gemini 3.1 Pro Preview

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

Claude Sonnet 4.5 vs GPT-5New provider

Claude Sonnet 4.5 vs Llama 4 MaverickNew provider

Claude Sonnet 4.5 vs MiniMax M2.5New provider

Claude Sonnet 4.5vsGemini 3.1 Pro Preview

37 fights queued

Why Claude Sonnet 4.5?

Dead even. This one's a coin flip.

Why Gemini 3.1 Pro Preview?

1.3x cheaper overall$2.00/M in · $12.00/M out

5.2x more context1.0M

Leads 1 of 1 benchmarks

Stronger on SWE-bench Verified80.6% vs 77.2%

5 months newerFeb 2026

Claude Sonnet 4.5Gemini 3.1 Pro Preview

Input price

$3.00/M

$2.00/M

Output price

$15.00/M

$12.00/M

Context

200K

1.0M

Released

Sep 2025

Feb 2026

Benchmarks1 common

SWE-bench Verified

77.2%

80.6%+4.2%

Favorites

Claude Sonnet 4.5Gemini 3.1 Pro Preview

Movie

2001: A Space Odyssey

2001: A Space Odyssey

The Matrix

The Matrix

Album

Kind of Blue

OK Computer

Book

Metamorphosis

Metamorphosis

Dune

Dune

City

Amsterdam

Tokyo

Game

Portal 2

Portal 2

Shooter, Puzzle4.6

Portal

Portal

Action, Puzzle4.5

12 / 37

01

Estimate Complexityreasoning

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

Claude Sonnet 4.5

Claude Sonnet 4.5

Anthropic · Sep 2025text

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

Try this prompt

Gemini 3.1 Pro Preview

Gemini 3.1 Pro Preview

Google · Feb 2026text

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

Try this prompt

Vote

2 / 37

02

AI Board Game Logicreasoning

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

Claude Sonnet 4.5

Claude Sonnet 4.5

Anthropic · Sep 2025svg

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

Try this prompt

Gemini 3.1 Pro Preview

Gemini 3.1 Pro Preview

Google · Feb 2026svg

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

Try this prompt

Vote

3 / 37

03

Logic Puzzlereasoning

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

Claude Sonnet 4.5

Claude Sonnet 4.5

Anthropic · Sep 2025text

I need to figure out how many sisters Sally has.

Given information:

Sally is a girl
Sally has 3 brothers

Now, each brother has 2 sisters.

If each of Sally's brothers has 2 sisters, and Sally is one of those sisters, then there must be one more sister besides Sally.

Let me verify:

Total sisters in the family: Sally + 1 other sister = 2 sisters
Each of the 3 brothers would have these same 2 sisters
This checks out ✓

Therefore, Sally has 1 sister.

Try this prompt

Gemini 3.1 Pro Preview

Gemini 3.1 Pro Preview

Google · Feb 2026text

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

Try this prompt

Vote

4 / 37

04

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Claude Sonnet 4.5

Claude Sonnet 4.5

Anthropic · Sep 2025text

5 Jokes

Why don't scientists trust atoms? Because they make up everything!
I told my wife she was drawing her eyebrows too high. She looked surprised.
Why did the scarecrow win an award? He was outstanding in his field.
I'm reading a book about anti-gravity. It's impossible to put down.
Why don't eggs tell jokes? They'd crack each other up.

Answer: All 5 jokes are unique. Each one has a different setup and punchline, covering different topics (atoms, eyebrows, scarecrows, gravity, and eggs).

Try this prompt

Gemini 3.1 Pro Preview

Gemini 3.1 Pro Preview

Google · Feb 2026text

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

Try this prompt

Vote

5 / 37

05

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Claude Sonnet 4.5

Claude Sonnet 4.5

Anthropic · Sep 2025svg

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

Try this prompt

Gemini 3.1 Pro Preview

Gemini 3.1 Pro Preview

Google · Feb 2026svg

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

Try this prompt

Vote

6 / 37

06

Xbox Controller SVG Artimage generation

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

Claude Sonnet 4.5

Claude Sonnet 4.5

Anthropic · Sep 2025svg

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

Try this prompt

Gemini 3.1 Pro Preview

Gemini 3.1 Pro Preview

Google · Feb 2026svg

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

Try this prompt

Vote

Sponsored

7 / 37

07

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

Claude Sonnet 4.5

Claude Sonnet 4.5

Anthropic · Sep 2025text

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

Try this prompt

Gemini 3.1 Pro Preview

Gemini 3.1 Pro Preview

Google · Feb 2026text

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

Try this prompt

Vote

8 / 37

08

Character Voice Testconversation

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

Claude Sonnet 4.5

Claude Sonnet 4.5

Anthropic · Sep 2025text

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

Try this prompt

Gemini 3.1 Pro Preview

Gemini 3.1 Pro Preview

Google · Feb 2026text

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

Try this prompt

Vote

9 / 37

09

Pokémon Battle UI Recreationweb design

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

Claude Sonnet 4.5

Claude Sonnet 4.5

Anthropic · Sep 2025website

Try this prompt

Gemini 3.1 Pro Preview

Gemini 3.1 Pro Preview

Google · Feb 2026website

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

Try this prompt

Vote

10 / 37

10

Mario Level UI Recreationweb design

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

Claude Sonnet 4.5

Claude Sonnet 4.5

Anthropic · Sep 2025website

Try this prompt

Gemini 3.1 Pro Preview

Gemini 3.1 Pro Preview

Google · Feb 2026website

Try this prompt

Vote

11 / 37

11

Linear App Cloneweb design

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

Claude Sonnet 4.5

Claude Sonnet 4.5

Anthropic · Sep 2025website

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

Try this prompt

Gemini 3.1 Pro Preview

Gemini 3.1 Pro Preview

Google · Feb 2026website

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

Try this prompt

Vote

12 / 37

12

Framer-Style Animationweb design

Tests an AI's ability to create smooth web animations

Claude Sonnet 4.5

Claude Sonnet 4.5

Anthropic · Sep 2025website

Try this prompt

Gemini 3.1 Pro Preview

Gemini 3.1 Pro Preview

Google · Feb 2026website

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

Try this prompt

Vote

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