Updated Feb 17, 2026

Our Verdict

Claude Sonnet 4.6

Gemini 2.5 Pro Experimental

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

Gemini 2.5 Pro Experimental is 7.5x cheaper per token — worth considering if cost matters.

Too close to call

Writing DNA

Style Comparison

Similarity

88%

Claude Sonnet 4.6 uses 19.1x more emoji

Claude Sonnet 4.6

Gemini 2.5 Pro Experimental

56%Vocabulary54%

36wSentence Length15w

0.53Hedging0.35

5.1Bold5.6

3.4Lists3.9

0.19Emoji0.00

2.10Headings0.39

0.02Transitions0.17

Based on 23 + 18 text responses

vs

Ask them anything yourself

Claude Sonnet 4.6

Gemini 2.5 Pro Experimental

Some models write identically. You are paying for the brand.

178 models fingerprinted across 32 writing dimensions. Free research.

Model Similarity Index

185x

price gap between models that write identically

178

models

12

clone pairs

32

dimensions

Devstral M / S

95.7%

Qwen3 Coder / Flash

95.6%

GPT-5.4 / Mini

93.3%

Read the full report or download the 14-slide PDF

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 4.6 vs GPT-5New provider

Claude Sonnet 4.6 vs Llama 4 MaverickNew provider

Gemini 2.5 Pro Experimental vs MiniMax M2.5New provider

Claude Sonnet 4.6vsGemini 2.5 Pro Experimental

37 fights queued

Why Claude Sonnet 4.6?

Leads 1 of 1 benchmarks

Stronger on SWE-bench Verified79.0% vs 63.8%

11 months newerFeb 2026

Why Gemini 2.5 Pro Experimental?

6.4x cheaper overall$1.00/M in · $2.00/M out

Claude Sonnet 4.6Gemini 2.5 Pro Experimental

Input price

$3.00/M

$1.00/M

Output price

$15.00/M

$2.00/M

Context

1.0M

1.0M

Released

Feb 2026

Mar 2025

Benchmarks1 common

SWE-bench Verified

79.0%+19.2%

63.8%

Favorites

Claude Sonnet 4.6Gemini 2.5 Pro Experimental

Movie

2001: A Space Odyssey

2001: A Space Odyssey

Khiam 2000-2007

Khiam 2000-2007

Album

Kind of Blue

The Dark Side of the Moon

The Dark Side of the Moon

Book

Middlemarch

Middlemarch

The Hitchh

City

Kyoto

Kyoto

Game

The Legend of Zelda: Ocarina of Time

The Legend of Zelda: Ocarina of Time

Adventure, Action4.4

Portal 2

Portal 2

Shooter, Puzzle4.6

12 / 37

01

AI Board Game Logicreasoning

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

Claude Sonnet 4.6

Claude Sonnet 4.6

Anthropic · Feb 2026svg

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

Try this prompt

Gemini 2.5 Pro Experimental

Gemini 2.5 Pro Experimental

Google · Mar 2025svg

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

Try this prompt

Vote

2 / 37

02

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Claude Sonnet 4.6

Claude Sonnet 4.6

Anthropic · Feb 2026text

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

Try this prompt

Gemini 2.5 Pro Experimental

Gemini 2.5 Pro Experimental

Google · Mar 2025text

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

Try this prompt

Vote

3 / 37

03

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Claude Sonnet 4.6

Claude Sonnet 4.6

Anthropic · Feb 2026svg

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

Try this prompt

Gemini 2.5 Pro Experimental

Gemini 2.5 Pro Experimental

Google · Mar 2025svg

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

Try this prompt

Vote

4 / 37

04

Xbox Controller SVG Artimage generation

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

Claude Sonnet 4.6

Claude Sonnet 4.6

Anthropic · Feb 2026svg

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

Try this prompt

Gemini 2.5 Pro Experimental

Gemini 2.5 Pro Experimental

Google · Mar 2025svg

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

Try this prompt

Vote

5 / 37

05

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

Claude Sonnet 4.6

Claude Sonnet 4.6

Anthropic · Feb 2026text

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

Try this prompt

Gemini 2.5 Pro Experimental

Gemini 2.5 Pro Experimental

Google · Mar 2025text

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

Try this prompt

Vote

6 / 37

06

Realistic AI Interviewconversation

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

Claude Sonnet 4.6

Claude Sonnet 4.6

Anthropic · Feb 2026text

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

Try this prompt

Gemini 2.5 Pro Experimental

Gemini 2.5 Pro Experimental

Google · Mar 2025text

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

Try this prompt

Vote

Sponsored

7 / 37

07

Satirical Fake News Headlineconversation

Tests an AI's humor and understanding of current events

Claude Sonnet 4.6

Claude Sonnet 4.6

Anthropic · Feb 2026text

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

Try this prompt

Gemini 2.5 Pro Experimental

Gemini 2.5 Pro Experimental

Google · Mar 2025text

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

Try this prompt

Vote

8 / 37

08

Minimalist Landing Pageweb design

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

Claude Sonnet 4.6

Claude Sonnet 4.6

Anthropic · Feb 2026website

Try this prompt

Gemini 2.5 Pro Experimental

Gemini 2.5 Pro Experimental

Google · Mar 2025website

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 4.6

Claude Sonnet 4.6

Anthropic · Feb 2026website

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

Try this prompt

Gemini 2.5 Pro Experimental

Gemini 2.5 Pro Experimental

Google · Mar 2025website

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 4.6

Claude Sonnet 4.6

Anthropic · Feb 2026website

Try this prompt

Gemini 2.5 Pro Experimental

Gemini 2.5 Pro Experimental

Google · Mar 2025website

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 4.6

Claude Sonnet 4.6

Anthropic · Feb 2026website

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

Try this prompt

Gemini 2.5 Pro Experimental

Gemini 2.5 Pro Experimental

Google · Mar 2025website

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 4.6

Claude Sonnet 4.6

Anthropic · Feb 2026website

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

Try this prompt

Gemini 2.5 Pro Experimental

Gemini 2.5 Pro Experimental

Google · Mar 2025website

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

Try this prompt

Vote

This matchup has more rounds

25+ more head-to-head results. Free. Not a trick.

Free account. No card required. By continuing, you agree to Rival's Terms and Privacy Policy