Mercury 2vsMuse Spark 1.3
Mercury 2 is cheaper than Muse Spark 1.3 at $0.25/M vs $1.25/M input tokens.
| Spec | Mercury 2 | Muse Spark 1.3 |
|---|---|---|
| Input price | $0.25/M tokens | $1.25/M tokens |
| Output price | $0.75/M tokens | $4.25/M tokens |
| Context window | 128K tokens | 1.0M tokens |
| Weights | — | Closed |
| Free API (OpenRouter) | No | No |
| Released | Mar 2026 | Sep 2026 |
Our Verdict
Muse Spark 1.3
Mercury 2Runner-up
Not enough votes to call it. On the specs, Muse Spark 1.3 has the edge: bigger model tier, newer, bigger context window, major provider backing.
Mercury 2 costs 5.7x less per token.
Slight edge
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
Mercury 2
Input
$0.25
5.0× cheaper
Output
$0.75
5.7× cheaper
Muse Spark 1.3
Input
$1.25
Output
$4.25
Mercury 2 is cheaper on both: 5.0× input, 5.7× output.
Where to run it
2 hosts
Mercury 21 host
Muse Spark 1.31 host
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Writing DNA
Style Comparison
Similarity
28%
Mercury 2 uses 8.2x more emoji
Mercury 2
Muse Spark 1.3
53%Vocabulary59%
22wSentence Length14w
0.40Hedging0.28
6.6Bold2.6
2.6Lists2.3
0.08Emoji0.00
0.87Headings0.48
0.14Transitions0.02
Based on 23 + 27 text responses
Research
What we learned reading every model
FAQ
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