Claude 3 Sonnet vs GPT-4

Compare Claude 3 Sonnet by Anthropic against GPT-4 by OpenAI, tested across 4 shared challenges. Updated April 2026.

Which is better, Claude 3 Sonnet or GPT-4?

Claude 3 Sonnet and GPT-4 are both competitive models. Claude 3 Sonnet costs $3/M input tokens vs $30/M for GPT-4. Compare their real outputs side by side below.

Key Differences Between Claude 3 Sonnet and GPT-4

Claude 3 Sonnet is made by anthropic while GPT-4 is from openai. On pricing, Claude 3 Sonnet costs $3/M input tokens vs $30/M for GPT-4.

Our Verdict
Claude 3 Sonnet
Claude 3 Sonnet
GPT-4
GPT-4

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

Claude 3 Sonnet is 4.0x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
96%

GPT-4 uses 82.3x more bold

Claude 3 Sonnet
GPT-4
48%Vocabulary59%
14wSentence Length18w
0.32Hedging1.10
0.0Bold0.8
3.6Lists2.5
0.00Emoji0.00
0.00Headings0.00
0.38Transitions0.45
Based on 4 + 15 text responses
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Claude 3 SonnetGPT-4

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
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