Claude Opus 4 vs GPT-5 Nano
Compare Claude Opus 4 by Anthropic against GPT-5 Nano by OpenAI, tested across 53 shared challenges. Updated May 2026.
Which is better, Claude Opus 4 or GPT-5 Nano?
Claude Opus 4 and GPT-5 Nano are both competitive models. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4 and GPT-5 Nano
Claude Opus 4 is made by anthropic while GPT-5 Nano is from openai.
API pricing
Per 1M tokens
Claude Opus 4
Input
$15.00
Output
$75.00
GPT-5 Nano
Input
—
Output
—
Our Verdict
Claude Opus 4
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
49%
Claude Opus 4 uses 444.0x more bold
Claude Opus 4
GPT-5 Nano
64%Vocabulary59%
62wSentence Length25w
0.52Hedging0.23
4.4Bold0.0
9.1Lists4.2
0.11Emoji0.00
1.87Headings0.00
0.27Transitions0.01
Based on 16 + 14 text responses
FAQ
