MercuryvsMuse Spark 1.3
Muse Spark 1.3 is cheaper than Mercury at $1.25/M vs $10/M input tokens.
| Spec | Mercury | Muse Spark 1.3 |
|---|---|---|
| Input price | $10/M tokens | $1.25/M tokens |
| Output price | $10/M tokens | $4.25/M tokens |
| Context window | 32K tokens | 1.0M tokens |
| Weights | — | Closed |
| Free API (OpenRouter) | No | No |
| Released | Jun 2025 | Sep 2026 |
Our Verdict
Muse Spark 1.3
MercuryRunner-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.
Slight edge
API pricing
Cost per 1M tokens
Mercury
Input
$10.00
Output
$10.00
Muse Spark 1.3
Input
$1.25
8.0× cheaper
Output
$4.25
2.4× cheaper
Muse Spark 1.3 is cheaper on both: 8.0× input, 2.4× output.
Where to run it
1 host
Mercury
No hosts listed on OpenRouter.
Muse Spark 1.31 host
Per million tokens. Prices and uptime via OpenRouter, checked 9 Sep 2026.
Writing DNA
Style Comparison
Similarity
44%
Mercury uses 2.8x more emoji
Mercury
Muse Spark 1.3
60%Vocabulary59%
31wSentence Length14w
0.78Hedging0.28
4.1Bold2.6
2.8Lists2.3
0.03Emoji0.00
0.88Headings0.48
0.06Transitions0.02
Based on 26 + 27 text responses
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