Claude Sonnet 4.5vsOpenAI o4 Mini High
OpenAI o4 Mini High is cheaper than Claude Sonnet 4.5 at $1.1/M vs $3/M input tokens.
| Spec | Claude Sonnet 4.5 | OpenAI o4 Mini High |
|---|---|---|
| Input price | $3/M tokens | $1.1/M tokens |
| Output price | $15/M tokens | $4.4/M tokens |
| Context window | 200K tokens | 200K tokens |
| Released | Sep 2025 | Apr 2025 |
| SWE-bench Verified | 77.2% | 68.1% |
Our Verdict
Claude Sonnet 4.5
OpenAI o4 Mini HighRunner-up
Not enough votes to call it. On the specs, Claude Sonnet 4.5 has the edge: bigger model tier, newer.
OpenAI o4 Mini High costs 3.4x less per token.
Too close to call
API pricing
Cost per 1M tokens
Claude Sonnet 4.5
Input
$3.00
Output
$15.00
OpenAI o4 Mini High
Input
$1.10
2.7× cheaper
Output
$4.40
3.4× cheaper
OpenAI o4 Mini High is cheaper on both — 2.7× input, 3.4× output
Writing DNA
Style Comparison
Similarity
45%
Claude Sonnet 4.5 uses 490.1x more bold
Claude Sonnet 4.5
OpenAI o4 Mini High
64%Vocabulary70%
94wSentence Length18w
0.48Hedging0.33
4.9Bold0.0
8.0Lists1.3
0.45Emoji0.02
1.91Headings0.00
0.07Transitions0.04
Based on 20 + 14 text responses
Research
What we learned reading every model
FAQ
Common questions
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