Grok Code Fast 1vsMercury 2.5 Preview
Mercury 2.5 Preview is cheaper than Grok Code Fast 1 at $0.04/M vs $0.2/M input tokens.
| Spec | Grok Code Fast 1 | Mercury 2.5 Preview |
|---|---|---|
| Input price | $0.2/M tokens | $0.04/M tokens |
| Output price | $1.5/M tokens | $0.15/M tokens |
| Context window | 256K tokens | 260K tokens |
| Free API (OpenRouter) | No | No |
| Released | Aug 2025 | Aug 2026 |
Our Verdict
Grok Code Fast 1
Mercury 2.5 Preview
Not enough votes to call it. On the specs, nothing separates them.
Mercury 2.5 Preview costs 10x less per token.
Too close to call
API pricing
Cost per 1M tokens
Grok Code Fast 1
Input
$0.20
Output
$1.50
Mercury 2.5 Preview
Input
$0.04
5.0× cheaper
Output
$0.15
10× cheaper
Mercury 2.5 Preview is cheaper on both: 5.0× input, 10× output.
Where to run it
1 host
Grok Code Fast 1
No hosts listed on OpenRouter.
Mercury 2.5 Preview1 host
Per million tokens. Prices and uptime via OpenRouter, checked 9 Sep 2026.
Writing DNA
Style Comparison
Similarity
57%
Grok Code Fast 1 uses 4.7x more emoji
Grok Code Fast 1
Mercury 2.5 Preview
61%Vocabulary65%
18wSentence Length14w
0.82Hedging0.44
2.5Bold4.9
2.3Lists3.3
0.05Emoji0.00
0.82Headings0.79
0.09Transitions0.20
Based on 29 + 26 text responses
Research
What we learned reading every model
FAQ
Common questions
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