Gemini 3.1 Pro PreviewvsSonar Pro Search
Gemini 3.1 Pro Preview is cheaper than Sonar Pro Search at $2/M vs $3/M input tokens.
| Spec | Gemini 3.1 Pro Preview | Sonar Pro Search |
|---|---|---|
| Input price | $2/M tokens | $3/M tokens |
| Output price | $12/M tokens | $15/M tokens |
| Context window | 1.0M tokens | 200K tokens |
| Released | Feb 2026 | Oct 2025 |
Our Verdict
Gemini 3.1 Pro Preview
Sonar Pro SearchRunner-up
Not enough votes to call it. On the specs, Gemini 3.1 Pro Preview has the edge: bigger model tier, newer, bigger context window, major provider backing.
Slight edge
API pricing
Cost per 1M tokens
Gemini 3.1 Pro Preview
Input
$2.00
1.5× cheaper
Output
$12.00
1.3× cheaper
Sonar Pro Search
Input
$3.00
Output
$15.00
Gemini 3.1 Pro Preview is cheaper on both — 1.5× input, 1.3× output
Writing DNA
Style Comparison
Similarity
43%
Sonar Pro Search uses 2.9x more headings
Gemini 3.1 Pro Preview
Sonar Pro Search
54%Vocabulary60%
18wSentence Length22w
0.29Hedging0.30
4.9Bold2.7
3.3Lists2.6
0.00Emoji0.00
0.72Headings2.08
0.14Transitions0.07
Based on 23 + 25 text responses
Research
What we learned reading every model
FAQ
Common questions
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