Gemini 3.1 Pro PreviewvsOpenAI o3
Gemini 3.1 Pro Preview is cheaper than OpenAI o3 at $2/M vs $10/M input tokens.
| Spec | Gemini 3.1 Pro Preview | OpenAI o3 |
|---|---|---|
| Input price | $2/M tokens | $10/M tokens |
| Output price | $12/M tokens | $40/M tokens |
| Context window | 1.0M tokens | — |
| Released | Feb 2026 | Apr 2025 |
| SWE-bench Verified | 80.6% | 69.1% |
Our Verdict
Gemini 3.1 Pro Preview
OpenAI o3
Not enough votes to call it. On the specs, nothing separates them.
Gemini 3.1 Pro Preview costs 3.3x less per token.
Too close to call
API pricing
Cost per 1M tokens
Gemini 3.1 Pro Preview
Input
$2.00
5.0× cheaper
Output
$12.00
3.3× cheaper
OpenAI o3
Input
$10.00
Output
$40.00
Gemini 3.1 Pro Preview is cheaper on both — 5.0× input, 3.3× output
Writing DNA
Style Comparison
Similarity
36%
Gemini 3.1 Pro Preview uses 7.0x more bold
Gemini 3.1 Pro Preview
OpenAI o3
54%Vocabulary68%
18wSentence Length14w
0.29Hedging0.26
4.9Bold0.7
3.3Lists3.0
0.00Emoji0.00
0.72Headings0.38
0.14Transitions0.12
Based on 23 + 16 text responses
Research
What we learned reading every model
FAQ
Common questions
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