Claude Sonnet 4.5 vs GPT-4
Compare Claude Sonnet 4.5 by Anthropic against GPT-4 by OpenAI, context windows of 200K vs 8K, tested across 26 shared challenges.
Our Verdict
Claude Sonnet 4.5
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 Sonnet 4.5 is 4.0x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Sonnet 4.5
Input
$3.00
10× cheaper
Output
$15.00
4.0× cheaper
GPT-4
Input
$30.00
Output
$60.00
Claude Sonnet 4.5 is cheaper on both — 10× input, 4.0× output
Writing DNA
Style Comparison
Similarity
54%
Claude Sonnet 4.5 uses 45.2x more emoji
Claude Sonnet 4.5
GPT-4
64%Vocabulary59%
94wSentence Length18w
0.48Hedging1.10
4.9Bold0.8
8.0Lists2.5
0.45Emoji0.00
1.91Headings0.00
0.07Transitions0.45
Based on 20 + 15 text responses
Research
What we learned reading every model
FAQ
