Claude Sonnet 4vso1
Claude Sonnet 4 is cheaper than o1 at $3/M vs $15/M input tokens.
| Spec | Claude Sonnet 4 | o1 |
|---|---|---|
| Input price | $3/M tokens | $15/M tokens |
| Output price | $15/M tokens | $60/M tokens |
| Context window | 200K tokens | 128K tokens |
| Released | May 2025 | Dec 2024 |
| SWE-bench Verified | 72.7% | 48.9% |
Our Verdict
Claude Sonnet 4
o1Runner-up
Not enough votes to call it. On the specs, Claude Sonnet 4 has the edge: bigger model tier, newer, bigger context window.
Claude Sonnet 4 costs 4.0x less per token.
Slight edge
API pricing
Cost per 1M tokens
Claude Sonnet 4
Input
$3.00
5.0× cheaper
Output
$15.00
4.0× cheaper
o1
Input
$15.00
Output
$60.00
Claude Sonnet 4 is cheaper on both — 5.0× input, 4.0× output
Writing DNA
Style Comparison
Similarity
54%
Claude Sonnet 4 uses 87.9x more emoji
Claude Sonnet 4
o1
62%Vocabulary64%
111wSentence Length16w
0.40Hedging0.76
5.0Bold5.0
9.3Lists2.6
0.88Emoji0.00
2.16Headings0.44
0.33Transitions0.40
Based on 17 + 13 text responses
Research
What we learned reading every model
FAQ
