Claude Opus 4 vs GPT-5.4 Nano
Compare Claude Opus 4 by Anthropic against GPT-5.4 Nano by OpenAI, context windows of 200K vs 400K, tested across 53 shared challenges.
Our Verdict
Claude Opus 4
GPT-5.4 Nano
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
GPT-5.4 Nano is 60x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Opus 4
Input
$15.00
Output
$75.00
GPT-5.4 Nano
Input
$0.20
75× cheaper
Output
$1.25
60× cheaper
GPT-5.4 Nano is cheaper on both — 75× input, 60× output
Writing DNA
Style Comparison
Similarity
53%
Claude Opus 4 uses 11.2x more emoji
Claude Opus 4
GPT-5.4 Nano
64%Vocabulary51%
62wSentence Length21w
0.52Hedging0.58
4.4Bold7.1
9.1Lists5.5
0.11Emoji0.01
1.87Headings1.39
0.27Transitions0.05
Based on 16 + 23 text responses
Research
What we learned reading every model
FAQ
