GPT-5vsMercury
GPT-5 is cheaper than Mercury at $1.25/M vs $10/M input tokens.
| Spec | GPT-5 | Mercury |
|---|---|---|
| Input price | $1.25/M tokens | $10/M tokens |
| Output price | $10/M tokens | $10/M tokens |
| Context window | 400K tokens | 32K tokens |
| Parameters | Not disclosed | Not disclosed |
| Weights | Closed | — |
| Free API (OpenRouter) | No | No |
| Released | Aug 2025 | Jun 2025 |
Our Verdict
GPT-5
MercuryRunner-up
Not enough votes to call it. On the specs, GPT-5 has the edge: bigger model tier, newer, bigger context window, major provider backing.
GPT-5 takes Image Generation.
Slight edge
API pricing
Cost per 1M tokens
GPT-5
Input
$1.25
8.0× cheaper
Output
$10.00
Mercury
Input
$10.00
Output
$10.00
Where to run it
2 hosts
Mercury
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 9 Sep 2026.
Writing DNA
Style Comparison
Similarity
48%
Mercury uses 2.8x more emoji
GPT-5
Mercury
65%Vocabulary60%
13wSentence Length31w
0.20Hedging0.78
0.2Bold4.1
4.6Lists2.8
0.00Emoji0.03
0.16Headings0.88
0.03Transitions0.06
Based on 16 + 26 text responses
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