Gemini 3.1 Pro PreviewvsGrok Code Fast 1
Grok Code Fast 1 is cheaper than Gemini 3.1 Pro Preview at $0.2/M vs $2/M input tokens.
| Spec | Gemini 3.1 Pro Preview | Grok Code Fast 1 |
|---|---|---|
| Input price | $2/M tokens | $0.2/M tokens |
| Output price | $12/M tokens | $1.5/M tokens |
| Context window | 1.0M tokens | 256K tokens |
| Released | Feb 2026 | Aug 2025 |
| SWE-bench Verified | 80.6% | 70.8% |
Our Verdict
Gemini 3.1 Pro Preview
Grok Code Fast 1Runner-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.
Grok Code Fast 1 costs 8.0x less per token.
Slight edge
API pricing
Cost per 1M tokens
Gemini 3.1 Pro Preview
Input
$2.00
Output
$12.00
Grok Code Fast 1
Input
$0.20
10× cheaper
Output
$1.50
8.0× cheaper
Grok Code Fast 1 is cheaper on both — 10× input, 8.0× output
Writing DNA
Style Comparison
Similarity
47%
Grok Code Fast 1 uses 6.0x more emoji
Gemini 3.1 Pro Preview
Grok Code Fast 1
54%Vocabulary60%
18wSentence Length17w
0.29Hedging0.97
4.9Bold2.8
3.3Lists2.5
0.00Emoji0.06
0.72Headings0.89
0.14Transitions0.11
Based on 23 + 23 text responses
Research
What we learned reading every model
FAQ
Common questions
Keep exploring
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