Bert-Nebulon AlphavsMuse Spark 1.3
Muse Spark 1.3 is the newer model, released after Bert-Nebulon Alpha.
| Spec | Bert-Nebulon Alpha | Muse Spark 1.3 |
|---|---|---|
| Input price | — | $1.25/M tokens |
| Output price | — | $4.25/M tokens |
| Context window | — | 1.0M tokens |
| Weights | — | Closed |
| Free API (OpenRouter) | No | No |
| Released | Nov 2025 | Sep 2026 |
Our Verdict
Muse Spark 1.3
Bert-Nebulon AlphaRunner-up
Not enough votes to call it. On the specs, Muse Spark 1.3 has the edge: newer, bigger context window, major provider backing.
Too close to call
API pricing
Cost per 1M tokens
Bert-Nebulon Alpha
Input
—
Output
—
Muse Spark 1.3
Input
$1.25
Output
$4.25
Where to run it
1 host
Bert-Nebulon Alpha
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
54%
Bert-Nebulon Alpha uses 42.4x more emoji
Bert-Nebulon Alpha
Muse Spark 1.3
55%Vocabulary59%
21wSentence Length14w
0.28Hedging0.28
10.9Bold2.6
5.7Lists2.3
0.42Emoji0.00
1.40Headings0.48
0.04Transitions0.02
Based on 14 + 27 text responses
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