Claude 3 Sonnet vs Claude Opus 4.1
Compare Claude 3 Sonnet and Claude Opus 4.1, both from Anthropic, tested across 13 shared challenges.
Our Verdict
Claude Opus 4.1
Claude 3 SonnetRunner-up
No community votes yet. On paper, Claude Opus 4.1 has the edge — bigger model tier, newer, bigger context window.
Claude 3 Sonnet is 5.0x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude 3 Sonnet
Input
$3.00
5.0× cheaper
Output
$15.00
5.0× cheaper
Claude Opus 4.1
Input
$15.00
Output
$75.00
Claude 3 Sonnet is cheaper on both — 5.0× input, 5.0× output
Writing DNA
Style Comparison
Similarity
41%
Claude Opus 4.1 uses 509.5x more bold
Claude 3 Sonnet
Claude Opus 4.1
48%Vocabulary61%
14wSentence Length87w
0.32Hedging0.54
0.0Bold5.1
3.6Lists6.7
0.00Emoji0.38
0.00Headings1.68
0.38Transitions0.13
Based on 4 + 17 text responses
Research
What we learned reading every model
FAQ
