GPT-5 MinivsMercury 2.5 Preview
Mercury 2.5 Preview is cheaper than GPT-5 Mini at $0.04/M vs $0.25/M input tokens.
| Spec | GPT-5 Mini | Mercury 2.5 Preview |
|---|---|---|
| Input price | $0.25/M tokens | $0.04/M tokens |
| Output price | $2/M tokens | $0.15/M tokens |
| Context window | — | 260K tokens |
| Weights | Closed | — |
| Free API (OpenRouter) | No | No |
| Released | Aug 2025 | Aug 2026 |
Our Verdict
GPT-5 Mini
Mercury 2.5 Preview
Not enough votes to call it. On the specs, nothing separates them.
Mercury 2.5 Preview costs 13x less per token.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
GPT-5 Mini
Input
$0.25
Output
$2.00
Mercury 2.5 Preview
Input
$0.04
6.3× cheaper
Output
$0.15
13× cheaper
Mercury 2.5 Preview is cheaper on both: 6.3× input, 13× output.
Where to run it
3 hosts
Mercury 2.5 Preview1 host
Per million tokens. Prices and uptime via OpenRouter, checked 11 Sep 2026.
Writing DNA
Style Comparison
Similarity
50%
Mercury 2.5 Preview uses 487.4x more bold
GPT-5 Mini
Mercury 2.5 Preview
62%Vocabulary65%
22wSentence Length14w
0.21Hedging0.44
0.0Bold4.9
3.8Lists3.3
0.00Emoji0.00
0.00Headings0.79
0.04Transitions0.20
Based on 21 + 26 text responses
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