Claude Sonnet 5 vs GPT-5.4
Compare Claude Sonnet 5 by Anthropic against GPT-5.4 by OpenAI, context windows of 1.0M vs 1.1M, tested across 53 shared challenges.
Our Verdict
Claude Sonnet 5
GPT-5.4
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
API pricing
Cost per 1M tokens
Claude Sonnet 5
Input
$2.00
1.3× cheaper
Output
$10.00
1.5× cheaper
GPT-5.4
Input
$2.50
Output
$15.00
Claude Sonnet 5 is cheaper on both — 1.3× input, 1.5× output
Writing DNA
Style Comparison
Similarity
55%
Claude Sonnet 5 uses 79.4x more emoji
Claude Sonnet 5
GPT-5.4
59%Vocabulary54%
35wSentence Length28w
0.53Hedging0.69
3.5Bold4.1
3.5Lists8.1
0.79Emoji0.00
1.25Headings1.84
0.06Transitions0.02
Based on 27 + 22 text responses
Research
What we learned reading every model
FAQ
