Claude Sonnet 4 vs Gemini 3 Pro Preview

Compare Claude Sonnet 4 by Anthropic against Gemini 3 Pro Preview by Google AI, tested across 32 shared challenges. Updated April 2026.

Which is better, Claude Sonnet 4 or Gemini 3 Pro Preview?

Claude Sonnet 4 and Gemini 3 Pro Preview are both competitive models. Compare their real outputs side by side below.

Key Differences Between Claude Sonnet 4 and Gemini 3 Pro Preview

Claude Sonnet 4 is made by anthropic while Gemini 3 Pro Preview is from google.

Our Verdict
Gemini 3 Pro Preview
Gemini 3 Pro Preview
Claude Sonnet 4
Claude Sonnet 4Runner-up

No community votes yet. On paper, Gemini 3 Pro Preview has the edge — bigger model tier, newer.

Too close to call
Writing DNA

Style Comparison

Similarity
96%

Claude Sonnet 4 uses 87.9x more emoji

Claude Sonnet 4
Gemini 3 Pro Preview
62%Vocabulary58%
111wSentence Length17w
0.40Hedging0.37
5.0Bold7.7
9.3Lists4.8
0.88Emoji0.00
2.16Headings0.90
0.33Transitions0.25
Based on 17 + 23 text responses
vs

Ask them anything yourself

Claude Sonnet 4Gemini 3 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
FAQ

Common questions