Claude 3 Sonnet vs Claude Sonnet 4
Compare Claude 3 Sonnet and Claude Sonnet 4, both from Anthropic, tested across 13 shared challenges. Updated June 2026.
Which is better, Claude 3 Sonnet or Claude Sonnet 4?
Claude 3 Sonnet and Claude Sonnet 4 are both competitive models. Claude 3 Sonnet costs $3/M input tokens vs $3/M for Claude Sonnet 4. Compare their real outputs side by side below.
Key Differences Between Claude 3 Sonnet and Claude Sonnet 4
Claude 3 Sonnet is made by anthropic while Claude Sonnet 4 is from anthropic. On pricing, Claude 3 Sonnet costs $3/M input tokens vs $3/M for Claude Sonnet 4.
API pricing
Per 1M tokens
Claude 3 Sonnet
Input
$3.00
Output
$15.00
Claude Sonnet 4
Input
$3.00
Output
$15.00
Our Verdict
Claude 3 Sonnet
Claude Sonnet 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
Writing DNA
Style Comparison
Similarity
46%
Claude Sonnet 4 uses 503.7x more bold
Claude 3 Sonnet
Claude Sonnet 4
48%Vocabulary62%
14wSentence Length111w
0.32Hedging0.40
0.0Bold5.0
3.6Lists9.3
0.00Emoji0.88
0.00Headings2.16
0.38Transitions0.33
Based on 4 + 17 text responses
FAQ
