Claude 3 Opus vs GPT-5 Nano
Compare Claude 3 Opus by Anthropic against GPT-5 Nano by OpenAI, tested across 12 shared challenges. Updated May 2026.
Which is better, Claude 3 Opus or GPT-5 Nano?
Claude 3 Opus and GPT-5 Nano are both competitive models. Compare their real outputs side by side below.
Key Differences Between Claude 3 Opus and GPT-5 Nano
Claude 3 Opus is made by anthropic while GPT-5 Nano is from openai.
API pricing
Per 1M tokens
Claude 3 Opus
Input
$15.00
Output
$75.00
GPT-5 Nano
Input
—
Output
—
Our Verdict
Claude 3 Opus
GPT-5 Nano
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Too close to call
Writing DNA
Style Comparison
Similarity
52%
Claude 3 Opus uses 5.4x more transitions
Claude 3 Opus
GPT-5 Nano
54%Vocabulary59%
14wSentence Length25w
0.48Hedging0.23
0.0Bold0.0
3.0Lists4.2
0.00Emoji0.00
0.00Headings0.00
0.06Transitions0.01
Based on 3 + 14 text responses
FAQ
