Claude 3 Sonnet vs Claude Opus 4
Compare Claude 3 Sonnet and Claude Opus 4, both from Anthropic, tested across 13 shared challenges. Updated June 2026.
Which is better, Claude 3 Sonnet or Claude Opus 4?
Claude 3 Sonnet and Claude Opus 4 are both competitive models. Claude 3 Sonnet costs $3/M input tokens vs $15/M for Claude Opus 4. Compare their real outputs side by side below.
Key Differences Between Claude 3 Sonnet and Claude Opus 4
Claude 3 Sonnet is made by anthropic while Claude Opus 4 is from anthropic. On pricing, Claude 3 Sonnet costs $3/M input tokens vs $15/M for Claude Opus 4.
API pricing
Per 1M tokens
Claude 3 Sonnet
Input
$3.00
5.0× cheaper
Output
$15.00
5.0× cheaper
Claude Opus 4
Input
$15.00
Output
$75.00
Claude 3 Sonnet is cheaper on both — 5.0× input, 5.0× output
Our Verdict
Claude Opus 4
Claude 3 SonnetRunner-up
No community votes yet. On paper, Claude Opus 4 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
Writing DNA
Style Comparison
Similarity
38%
Claude Opus 4 uses 444.0x more bold
Claude 3 Sonnet
Claude Opus 4
48%Vocabulary64%
14wSentence Length62w
0.32Hedging0.52
0.0Bold4.4
3.6Lists9.1
0.00Emoji0.11
0.00Headings1.87
0.38Transitions0.27
Based on 4 + 16 text responses
FAQ
